AM5 IOMMU VFIO - Best Motherboard

[LiKenun]

Contributing IOMMU groupings for the ASUS ROG Crosshair X670E Extreme after latest BIOS update (version 1004 from 3/30/2023):

tl;dr: yes, it still sucks because all of the networking, Thunderbolt, and some of the SATA and USB controllers are still lumped into one group. I expect the Proart, which is built very similarly to still be equally unpalatable for VFIO.

0. 1 device(s)
    * [1022:14da]     00:01.0  Host bridge                      Device 14da
1. 1 device(s)
    * [1022:14db] [R] 00:01.1  PCI bridge                       Device 14db
2. 1 device(s)
    * [1022:14db] [R] 00:01.4  PCI bridge                       Device 14db
3. 1 device(s)
    * [1022:14da]     00:02.0  Host bridge                      Device 14da
4. 1 device(s)
    * [1022:14db] [R] 00:02.1  PCI bridge                       Device 14db
5. 1 device(s)
    * [1022:14da]     00:03.0  Host bridge                      Device 14da
6. 1 device(s)
    * [1022:14da]     00:04.0  Host bridge                      Device 14da
7. 1 device(s)
    * [1022:14da]     00:08.0  Host bridge                      Device 14da
8. 1 device(s)
    * [1022:14dd] [R] 00:08.1  PCI bridge                       Device 14dd
9. 1 device(s)
    * [1022:14dd] [R] 00:08.3  PCI bridge                       Device 14dd
10. 2 device(s)
    * [1022:790b]     00:14.0  SMBus                            FCH SMBus Controller
    * [1022:790e]     00:14.3  ISA bridge                       FCH LPC Bridge
11. 8 device(s)
    * [1022:14e0]     00:18.0  Host bridge                      Device 14e0
    * [1022:14e1]     00:18.1  Host bridge                      Device 14e1
    * [1022:14e2]     00:18.2  Host bridge                      Device 14e2
    * [1022:14e3]     00:18.3  Host bridge                      Device 14e3
    * [1022:14e4]     00:18.4  Host bridge                      Device 14e4
    * [1022:14e5]     00:18.5  Host bridge                      Device 14e5
    * [1022:14e6]     00:18.6  Host bridge                      Device 14e6
    * [1022:14e7]     00:18.7  Host bridge                      Device 14e7
12. 2 device(s)
    * [10de:26b1] [R] 01:00.0  VGA compatible controller        Device 26b1
    * [10de:22ba]     01:00.1  Audio device                     Device 22ba
13. 1 device(s)
    * [8086:4140] [R] 02:00.0  Non-Volatile memory controller   NVMe Datacenter SSD [Optane]
14. 1 device(s)
    * [1022:43f4] [R] 03:00.0  PCI bridge                       Device 43f4
15. 2 device(s)
    * [1022:43f5] [R] 04:00.0  PCI bridge                       Device 43f5
    * [8086:2700] [R] 05:00.0  Non-Volatile memory controller   Optane SSD 900P Series
16. 23 device(s)
    * [1022:43f5] [R] 04:08.0  PCI bridge                       Device 43f5
    * [1022:43f4] [R] 06:00.0  PCI bridge                       Device 43f4
    * [1022:43f5] [R] 07:00.0  PCI bridge                       Device 43f5
    * [1022:43f5] [R] 07:01.0  PCI bridge                       Device 43f5
    * [1022:43f5] [R] 07:02.0  PCI bridge                       Device 43f5
    * [1022:43f5] [R] 07:03.0  PCI bridge                       Device 43f5
    * [1022:43f5] [R] 07:04.0  PCI bridge                       Device 43f5
    * [1022:43f5] [R] 07:08.0  PCI bridge                       Device 43f5
    * [1022:43f5]     07:0c.0  PCI bridge                       Device 43f5
    * [1022:43f5]     07:0d.0  PCI bridge                       Device 43f5
    * [8086:2725] [R] 08:00.0  Network controller               Wi-Fi 6 AX210/AX211/AX411 160MHz
    * [8086:15f3] [R] 09:00.0  Ethernet controller              Ethernet Controller I225-V
    * [1d6a:94c0] [R] 0a:00.0  Ethernet controller              AQC113CS NBase-T/IEEE 802.3bz Ethernet Controller [AQtion]
    * [1b21:0612] [R] 0b:00.0  SATA controller                  ASM1062 Serial ATA Controller
    * [8086:1136] [R] 0c:00.0  PCI bridge                       Thunderbolt 4 Bridge [Maple Ridge 4C 2020]
    * [8086:1136] [R] 0d:00.0  PCI bridge                       Thunderbolt 4 Bridge [Maple Ridge 4C 2020]
    * [8086:1136]     0d:01.0  PCI bridge                       Thunderbolt 4 Bridge [Maple Ridge 4C 2020]
    * [8086:1136]     0d:02.0  PCI bridge                       Thunderbolt 4 Bridge [Maple Ridge 4C 2020]
    * [8086:1136]     0d:03.0  PCI bridge                       Thunderbolt 4 Bridge [Maple Ridge 4C 2020]
    * [8086:1137] [R] 0e:00.0  USB controller                   Thunderbolt 4 NHI [Maple Ridge 4C 2020]
    * [8086:1138] [R] 3a:00.0  USB controller                   Thunderbolt 4 USB Controller [Maple Ridge 4C 2020]
        * [1d6b:0002]          Bus 001 Device 001               Linux Foundation 2.0 root hub
        * [1d6b:0003]          Bus 002 Device 001               Linux Foundation 3.0 root hub
    * [1022:43f7] [R] 67:00.0  USB controller                   Device 43f7
        * [1d6b:0002]          Bus 003 Device 001               Linux Foundation 2.0 root hub
        * [8087:0032]          Bus 003 Device 002               Intel Corp. AX210 Bluetooth
        * [2109:0103]          Bus 003 Device 003               VIA Labs, Inc. USB 2.0 BILLBOARD
        * [0b05:1a21]          Bus 003 Device 004               ASUSTek Computer, Inc. OLED Controller
        * [1d6b:0003]          Bus 004 Device 001               Linux Foundation 3.0 root hub
    * [1022:43f6] [R] 68:00.0  SATA controller                  Device 43f6
17. 2 device(s)
    * [1022:43f5]     04:0c.0  PCI bridge                       Device 43f5
    * [1022:43f7] [R] 69:00.0  USB controller                   Device 43f7
        * [1d6b:0002]          Bus 005 Device 001               Linux Foundation 2.0 root hub
        * [174c:2074]          Bus 005 Device 002               ASMedia Technology Inc. ASM1074 High-Speed hub
        * [0b05:1a53]          Bus 005 Device 003               ASUSTek Computer, Inc. USB Audio
        * [0b05:18f3]          Bus 005 Device 004               ASUSTek Computer, Inc. AURA LED Controller
        * [1d6b:0003]          Bus 006 Device 001               Linux Foundation 3.0 root hub
        * [174c:3074]          Bus 006 Device 002               ASMedia Technology Inc. ASM1074 SuperSpeed hub
18. 2 device(s)
    * [1022:43f5]     04:0d.0  PCI bridge                       Device 43f5
    * [1022:43f6] [R] 6a:00.0  SATA controller                  Device 43f6
19. 1 device(s)
    * [1002:164e] [R] 6b:00.0  VGA compatible controller        Raphael
20. 1 device(s)
    * [1002:1640] [R] 6b:00.1  Audio device                     Rembrandt Radeon High Definition Audio Controller
21. 1 device(s)
    * [1022:1649]     6b:00.2  Encryption controller            VanGogh PSP/CCP
22. 1 device(s)
    * [1022:15b6] [R] 6b:00.3  USB controller                   Device 15b6
        * [1d6b:0002]          Bus 007 Device 001               Linux Foundation 2.0 root hub
        * [1d6b:0003]          Bus 008 Device 001               Linux Foundation 3.0 root hub
23. 1 device(s)
    * [1022:15b7] [R] 6b:00.4  USB controller                   Device 15b7
        * [1d6b:0002]          Bus 009 Device 001               Linux Foundation 2.0 root hub
        * [1d6b:0003]          Bus 010 Device 001               Linux Foundation 3.0 root hub
24. 1 device(s)
    * [1022:15b8] [R] 6c:00.0  USB controller                   Device 15b8
        * [1d6b:0002]          Bus 011 Device 001               Linux Foundation 2.0 root hub
        * [1d6b:0003]          Bus 012 Device 001               Linux Foundation 3.0 root hub

---

EDIT: other IOMMU groupings collected from elsewhere to save people from extra legwork

Summary

MSI MPG X670E CARBON WIFI

@jxdking

Here is my iommu group of MSI x670e Carbon. Primary GPU on the 1st PCIE. Intel x540-t2 on the 2nd PCIE, with vfs enabled.

Group 0:        [1022:14da]     00:01.0  Host bridge                              Device 14da
Group 1:        [1022:14db] [R] 00:01.1  PCI bridge                               Device 14db
Group 2:        [1022:14db] [R] 00:01.2  PCI bridge                               Device 14db
Group 3:        [1022:14db] [R] 00:01.3  PCI bridge                               Device 14db
Group 4:        [1022:14da]     00:02.0  Host bridge                              Device 14da
Group 5:        [1022:14db] [R] 00:02.1  PCI bridge                               Device 14db
Group 6:        [1022:14db] [R] 00:02.2  PCI bridge                               Device 14db
Group 7:        [1022:14da]     00:03.0  Host bridge                              Device 14da
Group 8:        [1022:14da]     00:04.0  Host bridge                              Device 14da
Group 9:        [1022:14da]     00:08.0  Host bridge                              Device 14da
Group 10:       [1022:14dd] [R] 00:08.1  PCI bridge                               Device 14dd
Group 11:       [1022:14dd] [R] 00:08.3  PCI bridge                               Device 14dd
Group 12:       [1022:790b]     00:14.0  SMBus                                    FCH SMBus Controller
                [1022:790e]     00:14.3  ISA bridge                               FCH LPC Bridge
Group 13:       [1022:14e0]     00:18.0  Host bridge                              Device 14e0
                [1022:14e1]     00:18.1  Host bridge                              Device 14e1
                [1022:14e2]     00:18.2  Host bridge                              Device 14e2
                [1022:14e3]     00:18.3  Host bridge                              Device 14e3
                [1022:14e4]     00:18.4  Host bridge                              Device 14e4
                [1022:14e5]     00:18.5  Host bridge                              Device 14e5
                [1022:14e6]     00:18.6  Host bridge                              Device 14e6
                [1022:14e7]     00:18.7  Host bridge                              Device 14e7
Group 14:       [10de:2782] [R] 01:00.0  VGA compatible controller                Device 2782
                [10de:22bc]     01:00.1  Audio device                             Device 22bc
Group 15:       [8086:f1aa] [R] 02:00.0  Non-Volatile memory controller           Device f1aa
Group 16:       [8086:1528] [R] 03:00.0  Ethernet controller                      Ethernet Controller 10-Gigabit X540-AT2
Group 17:       [8086:1528] [R] 03:00.1  Ethernet controller                      Ethernet Controller 10-Gigabit X540-AT2
Group 18:       [1022:43f4] [R] 04:00.0  PCI bridge                               Device 43f4
Group 19:       [1022:43f5] [R] 05:00.0  PCI bridge                               Device 43f5
Group 20:       [1022:43f5] [R] 05:04.0  PCI bridge                               Device 43f5
Group 21:       [1022:43f5] [R] 05:05.0  PCI bridge                               Device 43f5
Group 22:       [1022:43f5] [R] 05:06.0  PCI bridge                               Device 43f5
Group 23:       [1022:43f5] [R] 05:07.0  PCI bridge                               Device 43f5
Group 24:       [1022:43f5] [R] 05:08.0  PCI bridge                               Device 43f5
                [1022:43f4] [R] 0b:00.0  PCI bridge                               Device 43f4
                [1022:43f5] [R] 0c:00.0  PCI bridge                               Device 43f5
                [1022:43f5] [R] 0c:05.0  PCI bridge                               Device 43f5
                [1022:43f5] [R] 0c:06.0  PCI bridge                               Device 43f5
                [1022:43f5] [R] 0c:07.0  PCI bridge                               Device 43f5
                [1022:43f5] [R] 0c:08.0  PCI bridge                               Device 43f5
                [1022:43f5]     0c:0c.0  PCI bridge                               Device 43f5
                [1022:43f5]     0c:0d.0  PCI bridge                               Device 43f5
                [10ec:8125] [R] 0e:00.0  Ethernet controller                      RTL8125 2.5GbE Controller
                [1022:43f7] [R] 12:00.0  USB controller                           Device 43f7
USB:            [1462:7d70]              Bus 001 Device 002                       Micro Star International MYSTIC LIGHT
USB:            [1d6b:0002]              Bus 001 Device 001                       Linux Foundation 2.0 root hub
USB:            [1d6b:0003]              Bus 002 Device 001                       Linux Foundation 3.0 root hub
                [1022:43f6] [R] 13:00.0  SATA controller                          Device 43f6
Group 25:       [1022:43f5]     05:0c.0  PCI bridge                               Device 43f5
                [1022:43f7] [R] 14:00.0  USB controller                           Device 43f7
Group 26:       [1022:43f5]     05:0d.0  PCI bridge                               Device 43f5
                [1022:43f6] [R] 15:00.0  SATA controller                          Device 43f6
Group 27:       [8086:f1aa] [R] 16:00.0  Non-Volatile memory controller           Device f1aa
Group 28:       [1002:164e] [R] 17:00.0  VGA compatible controller                Device 164e
Group 29:       [1002:1640] [R] 17:00.1  Audio device                             Device 1640
Group 30:       [1022:1649]     17:00.2  Encryption controller                    VanGogh PSP/CCP
Group 31:       [1022:15b6] [R] 17:00.3  USB controller                           Device 15b6
USB:            [0764:0501]              Bus 005 Device 003                       Cyber Power System, Inc. CP1500 AVR UPS
USB:            [1d6b:0002]              Bus 005 Device 001                       Linux Foundation 2.0 root hub
USB:            [1d6b:0003]              Bus 006 Device 001                       Linux Foundation 3.0 root hub
Group 32:       [1022:15b7] [R] 17:00.4  USB controller                           Device 15b7
USB:            [0930:1400]              Bus 007 Device 002                       Toshiba Corp. Memory Stick 2GB
USB:            [1d6b:0002]              Bus 007 Device 001                       Linux Foundation 2.0 root hub
USB:            [1d6b:0003]              Bus 008 Device 001                       Linux Foundation 3.0 root hub
Group 33:       [1022:15e3]     17:00.6  Audio device                             Family 17h (Models 10h-1fh) HD Audio Controller
Group 34:       [1022:15b8] [R] 18:00.0  USB controller                           Device 15b8
USB:            [1d6b:0003]              Bus 010 Device 001                       Linux Foundation 3.0 root hub
USB:            [1d6b:0002]              Bus 009 Device 001                       Linux Foundation 2.0 root hub
Group 35:       [8086:1515] [R] 03:10.1  Ethernet controller                      X540 Ethernet Controller Virtual Function
Group 36:       [8086:1515] [R] 03:10.3  Ethernet controller                      X540 Ethernet Controller Virtual Function
Group 37:       [8086:1515] [R] 03:10.5  Ethernet controller                      X540 Ethernet Controller Virtual Function
Group 38:       [8086:1515] [R] 03:10.7  Ethernet controller                      X540 Ethernet Controller Virtual Function
Group 39:       [8086:1515] [R] 03:11.1  Ethernet controller                      X540 Ethernet Controller Virtual Function
Group 40:       [8086:1515] [R] 03:11.3  Ethernet controller                      X540 Ethernet Controller Virtual Function
Group 41:       [8086:1515] [R] 03:11.5  Ethernet controller                      X540 Ethernet Controller Virtual Function
Group 42:       [8086:1515] [R] 03:11.7  Ethernet controller                      X540 Ethernet Controller Virt

---

GIGABYTE X670E AORUS MASTER (rev. 1.0)

@DS_DV

So here are my IOMMU Groups with BIOS Version F8

Group 0:	[1022:14da]     00:01.0  Host bridge                              Device 14da
Group 1:	[1022:14da]     00:02.0  Host bridge                              Device 14da
Group 2:	[1022:14db] [R] 00:02.1  PCI bridge                               Device 14db
Group 3:	[1022:14db] [R] 00:02.2  PCI bridge                               Device 14db
Group 4:	[1022:14da]     00:03.0  Host bridge                              Device 14da
Group 5:	[1022:14da]     00:04.0  Host bridge                              Device 14da
Group 6:	[1022:14da]     00:08.0  Host bridge                              Device 14da
Group 7:	[1022:14dd] [R] 00:08.1  PCI bridge                               Device 14dd
Group 8:	[1022:14dd] [R] 00:08.3  PCI bridge                               Device 14dd
Group 9:	[1022:790b]     00:14.0  SMBus                                    FCH SMBus Controller
		[1022:790e]     00:14.3  ISA bridge                               FCH LPC Bridge
Group 10:	[1022:14e0]     00:18.0  Host bridge                              Device 14e0
		[1022:14e1]     00:18.1  Host bridge                              Device 14e1
		[1022:14e2]     00:18.2  Host bridge                              Device 14e2
		[1022:14e3]     00:18.3  Host bridge                              Device 14e3
		[1022:14e4]     00:18.4  Host bridge                              Device 14e4
		[1022:14e5]     00:18.5  Host bridge                              Device 14e5
		[1022:14e6]     00:18.6  Host bridge                              Device 14e6
		[1022:14e7]     00:18.7  Host bridge                              Device 14e7
Group 11:	[1022:43f4] [R] 01:00.0  PCI bridge                               Device 43f4
Group 12:	[1022:43f5] [R] 02:00.0  PCI bridge                               Device 43f5
Group 13:	[1022:43f5] [R] 02:04.0  PCI bridge                               Device 43f5
Group 14:	[1022:43f5] [R] 02:05.0  PCI bridge                               Device 43f5
Group 15:	[1022:43f5] [R] 02:06.0  PCI bridge                               Device 43f5
Group 16:	[1022:43f5] [R] 02:08.0  PCI bridge                               Device 43f5
		[1022:43f4] [R] 07:00.0  PCI bridge                               Device 43f4
		[1022:43f5] [R] 08:00.0  PCI bridge                               Device 43f5
		[1022:43f5] [R] 08:04.0  PCI bridge                               Device 43f5
		[1022:43f5] [R] 08:06.0  PCI bridge                               Device 43f5
		[1022:43f5] [R] 08:07.0  PCI bridge                               Device 43f5
		[1022:43f5] [R] 08:08.0  PCI bridge                               Device 43f5
		[1022:43f5]     08:0c.0  PCI bridge                               Device 43f5
		[1022:43f5]     08:0d.0  PCI bridge                               Device 43f5
		[8086:15f3] [R] 0b:00.0  Ethernet controller                      Ethernet Controller I225-V
		[8086:2725] [R] 0c:00.0  Network controller                       Wi-Fi 6 AX210/AX211/AX411 160MHz
		[144d:a804] [R] 0d:00.0  Non-Volatile memory controller           NVMe SSD Controller SM961/PM961/SM963
		[1022:43f7] [R] 0e:00.0  USB controller                           Device 43f7
USB:		[8087:0032]		 Bus 001 Device 003                       Intel Corp. AX210 Bluetooth 
USB:		[090c:1000]		 Bus 001 Device 002                       xxxx
USB:		[1d6b:0002]		 Bus 001 Device 001                       Linux Foundation 2.0 root hub 
USB:		[1d6b:0003]		 Bus 002 Device 001                       Linux Foundation 3.0 root hub 
		[1022:43f6] [R] 0f:00.0  SATA controller                          Device 43f6
Group 17:	[1022:43f5]     02:0c.0  PCI bridge                               Device 43f5
		[1022:43f7] [R] 10:00.0  USB controller                           Device 43f7
USB:		[048d:5702]		 Bus 003 Device 004                       xxxx
USB:		[045e:02fe]		 Bus 003 Device 009                       xxxx
USB:		[046d:c52b]		 Bus 003 Device 010                       xxxx
USB:		[05e3:0608]		 Bus 003 Device 008                       xxxx
USB:		[04a5:8001]		 Bus 003 Device 007                       xxxx Mouse 
USB:		[1b1c:1b13]		 Bus 003 Device 005                       xxxx keyboard 
USB:		[0bda:5411]		 Bus 003 Device 003                       Realtek Semiconductor Corp. RTS5411 Hub 
USB:		[046d:c548]		 Bus 003 Device 002                       xxxx
USB:		[1e71:170e]		 Bus 003 Device 006                       xxxx 
USB:		[1d6b:0002]		 Bus 003 Device 001                       Linux Foundation 2.0 root hub 
USB:		[0bda:0411]		 Bus 004 Device 002                       Realtek Semiconductor Corp. Hub 
USB:		[1d6b:0003]		 Bus 004 Device 001                       Linux Foundation 3.0 root hub 
Group 18:	[1022:43f5]     02:0d.0  PCI bridge                               Device 43f5
		[1022:43f6] [R] 11:00.0  SATA controller                          Device 43f6
Group 19:	[144d:a80c] [R] 12:00.0  Non-Volatile memory controller           Device a80c
Group 20:	[1002:164e] [R] 13:00.0  VGA compatible controller                Raphael
Group 21:	[1002:1640] [R] 13:00.1  Audio device                             Rembrandt Radeon High Definition Audio Controller
Group 22:	[1022:1649]     13:00.2  Encryption controller                    VanGogh PSP/CCP
Group 23:	[1022:15b6] [R] 13:00.3  USB controller                           Device 15b6
USB:		[0bda:2172]		 Bus 005 Device 002                       Realtek Semiconductor Corp. BillBoard Device 
USB:		[1d6b:0002]		 Bus 005 Device 001                       Linux Foundation 2.0 root hub 
USB:		[1d6b:0003]		 Bus 006 Device 001                       Linux Foundation 3.0 root hub 
Group 24:	[1022:15b7] [R] 13:00.4  USB controller                           Device 15b7
USB:		[19f7:0003]		 Bus 007 Device 003                       xxxx
USB:		[1307:0165]		 Bus 007 Device 002                       xxxx
USB:		[1d6b:0002]		 Bus 007 Device 001                       Linux Foundation 2.0 root hub 
USB:		[1d6b:0003]		 Bus 008 Device 001                       Linux Foundation 3.0 root hub 
Group 25:	[1022:15e3]     13:00.6  Audio device                             Family 17h/19h HD Audio Controller
Group 26:	[1022:15b8] [R] 14:00.0  USB controller                           Device 15b8
USB:		[1d6b:0003]		 Bus 010 Device 001                       Linux Foundation 3.0 root hub 
USB:		[05e3:0608]		 Bus 009 Device 002                       Genesys Logic, Inc. Hub 
USB:		[1d6b:0002]		 Bus 009 Device 001                       Linux Foundation 2.0 root hub

interestingly it only shows my 950 Evo on one of the PCIe4 slots and not the 990Pro on the 1st PCIe 5 Slot o.o

---

ASUS TUF GAMING X670E-PLUS WIFI

@januszmk

here are groups from asus tuf gaming x670e-plus. please note that I do not own dedicated gpu yet

IOMMU Group 0:
	00:01.0 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Device [1022:14da]
IOMMU Group 1:
	00:01.2 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Device [1022:14db]
IOMMU Group 2:
	00:02.0 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Device [1022:14da]
IOMMU Group 3:
	00:02.1 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Device [1022:14db]
IOMMU Group 4:
	00:02.2 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Device [1022:14db]
IOMMU Group 5:
	00:03.0 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Device [1022:14da]
IOMMU Group 6:
	00:04.0 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Device [1022:14da]
IOMMU Group 7:
	00:08.0 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Device [1022:14da]
IOMMU Group 8:
	00:08.1 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Device [1022:14dd]
IOMMU Group 9:
	00:08.3 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Device [1022:14dd]
IOMMU Group 10:
	00:14.0 SMBus [0c05]: Advanced Micro Devices, Inc. [AMD] FCH SMBus Controller [1022:790b] (rev 71)
	00:14.3 ISA bridge [0601]: Advanced Micro Devices, Inc. [AMD] FCH LPC Bridge [1022:790e] (rev 51)
IOMMU Group 11:
	00:18.0 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Device [1022:14e0]
	00:18.1 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Device [1022:14e1]
	00:18.2 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Device [1022:14e2]
	00:18.3 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Device [1022:14e3]
	00:18.4 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Device [1022:14e4]
	00:18.5 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Device [1022:14e5]
	00:18.6 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Device [1022:14e6]
	00:18.7 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Device [1022:14e7]
IOMMU Group 12:
	01:00.0 Non-Volatile memory controller [0108]: Samsung Electronics Co Ltd NVMe SSD Controller PM9A1/PM9A3/980PRO [144d:a80a]
IOMMU Group 13:
	02:00.0 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Device [1022:43f4] (rev 01)
IOMMU Group 14:
	03:00.0 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Device [1022:43f5] (rev 01)
IOMMU Group 15:
	03:04.0 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Device [1022:43f5] (rev 01)
IOMMU Group 16:
	03:08.0 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Device [1022:43f5] (rev 01)
	06:00.0 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Device [1022:43f4] (rev 01)
	07:00.0 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Device [1022:43f5] (rev 01)
	07:04.0 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Device [1022:43f5] (rev 01)
	07:05.0 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Device [1022:43f5] (rev 01)
	07:08.0 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Device [1022:43f5] (rev 01)
	07:0c.0 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Device [1022:43f5] (rev 01)
	07:0d.0 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Device [1022:43f5] (rev 01)
	09:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8125 2.5GbE Controller [10ec:8125] (rev 05)
	0c:00.0 USB controller [0c03]: Advanced Micro Devices, Inc. [AMD] Device [1022:43f7] (rev 01)
	0d:00.0 SATA controller [0106]: Advanced Micro Devices, Inc. [AMD] Device [1022:43f6] (rev 01)
IOMMU Group 17:
	03:0c.0 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Device [1022:43f5] (rev 01)
	0e:00.0 USB controller [0c03]: Advanced Micro Devices, Inc. [AMD] Device [1022:43f7] (rev 01)
IOMMU Group 18:
	03:0d.0 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Device [1022:43f5] (rev 01)
	0f:00.0 SATA controller [0106]: Advanced Micro Devices, Inc. [AMD] Device [1022:43f6] (rev 01)
IOMMU Group 19:
	10:00.0 Non-Volatile memory controller [0108]: Samsung Electronics Co Ltd NVMe SSD Controller SM981/PM981/PM983 [144d:a808]
IOMMU Group 20:
	11:00.0 VGA compatible controller [0300]: Advanced Micro Devices, Inc. [AMD/ATI] Raphael [1002:164e] (rev c1)
IOMMU Group 21:
	11:00.1 Audio device [0403]: Advanced Micro Devices, Inc. [AMD/ATI] Rembrandt Radeon High Definition Audio Controller [1002:1640]
IOMMU Group 22:
	11:00.2 Encryption controller [1080]: Advanced Micro Devices, Inc. [AMD] VanGogh PSP/CCP [1022:1649]
IOMMU Group 23:
	11:00.3 USB controller [0c03]: Advanced Micro Devices, Inc. [AMD] Device [1022:15b6]
IOMMU Group 24:
	11:00.4 USB controller [0c03]: Advanced Micro Devices, Inc. [AMD] Device [1022:15b7]
IOMMU Group 25:
	11:00.6 Audio device [0403]: Advanced Micro Devices, Inc. [AMD] Family 17h/19h HD Audio Controller [1022:15e3]
IOMMU Group 26:
	12:00.0 USB controller [0c03]: Advanced Micro Devices, Inc. [AMD] Device [1022:15b8]

---

ASRock X670E Taichi

@BuzzBumbleBee

IOMMU Group 0:
	00:01.0 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Device [1022:14da]
IOMMU Group 1:
	00:01.1 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Device [1022:14db]
IOMMU Group 2:
	00:01.2 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Device [1022:14db]
IOMMU Group 3:
	00:02.0 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Device [1022:14da]
IOMMU Group 4:
	00:02.1 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Device [1022:14db]
IOMMU Group 5:
	00:02.2 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Device [1022:14db]
IOMMU Group 6:
	00:03.0 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Device [1022:14da]
IOMMU Group 7:
	00:04.0 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Device [1022:14da]
IOMMU Group 8:
	00:08.0 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Device [1022:14da]
IOMMU Group 9:
	00:08.1 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Device [1022:14dd]
IOMMU Group 10:
	00:08.3 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Device [1022:14dd]
IOMMU Group 11:
	00:14.0 SMBus [0c05]: Advanced Micro Devices, Inc. [AMD] FCH SMBus Controller [1022:790b] (rev 71)
	00:14.3 ISA bridge [0601]: Advanced Micro Devices, Inc. [AMD] FCH LPC Bridge [1022:790e] (rev 51)
IOMMU Group 12:
	00:18.0 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Device [1022:14e0]
	00:18.1 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Device [1022:14e1]
	00:18.2 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Device [1022:14e2]
	00:18.3 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Device [1022:14e3]
	00:18.4 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Device [1022:14e4]
	00:18.5 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Device [1022:14e5]
	00:18.6 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Device [1022:14e6]
	00:18.7 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Device [1022:14e7]
IOMMU Group 13:
	01:00.0 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD/ATI] Navi 10 XL Upstream Port of PCI Express Switch [1002:1478] (rev c1)
IOMMU Group 14:
	02:00.0 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD/ATI] Navi 10 XL Downstream Port of PCI Express Switch [1002:1479]
IOMMU Group 15:
	03:00.0 VGA compatible controller [0300]: Advanced Micro Devices, Inc. [AMD/ATI] Navi 21 [Radeon RX 6800/6800 XT / 6900 XT] [1002:73bf] (rev c1)
IOMMU Group 16:
	03:00.1 Audio device [0403]: Advanced Micro Devices, Inc. [AMD/ATI] Navi 21/23 HDMI/DP Audio Controller [1002:ab28]
IOMMU Group 17:
	03:00.2 USB controller [0c03]: Advanced Micro Devices, Inc. [AMD/ATI] Device [1002:73a6]
IOMMU Group 18:
	03:00.3 Serial bus controller [0c80]: Advanced Micro Devices, Inc. [AMD/ATI] Navi 21 USB [1002:73a4]
IOMMU Group 19:
	04:00.0 PCI bridge [0604]: Intel Corporation Thunderbolt 4 Bridge [Maple Ridge 4C 2020] [8086:1136] (rev 02)
IOMMU Group 20:
	05:00.0 PCI bridge [0604]: Intel Corporation Thunderbolt 4 Bridge [Maple Ridge 4C 2020] [8086:1136] (rev 02)
IOMMU Group 21:
	05:01.0 PCI bridge [0604]: Intel Corporation Thunderbolt 4 Bridge [Maple Ridge 4C 2020] [8086:1136] (rev 02)
IOMMU Group 22:
	05:02.0 PCI bridge [0604]: Intel Corporation Thunderbolt 4 Bridge [Maple Ridge 4C 2020] [8086:1136] (rev 02)
IOMMU Group 23:
	05:03.0 PCI bridge [0604]: Intel Corporation Thunderbolt 4 Bridge [Maple Ridge 4C 2020] [8086:1136] (rev 02)
IOMMU Group 24:
	06:00.0 USB controller [0c03]: Intel Corporation Thunderbolt 4 NHI [Maple Ridge 4C 2020] [8086:1137]
IOMMU Group 25:
	08:00.0 USB controller [0c03]: Intel Corporation Thunderbolt 4 USB Controller [Maple Ridge 4C 2020] [8086:1138]
IOMMU Group 26:
	45:00.0 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Device [1022:43f4] (rev 01)
IOMMU Group 27:
	46:00.0 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Device [1022:43f5] (rev 01)
IOMMU Group 28:
	46:04.0 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Device [1022:43f5] (rev 01)
	48:00.0 SATA controller [0106]: ASMedia Technology Inc. ASM1062 Serial ATA Controller [1b21:0612] (rev 02)
IOMMU Group 29:
	46:05.0 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Device [1022:43f5] (rev 01)
	49:00.0 Network controller [0280]: Intel Corporation Wi-Fi 6 AX210/AX211/AX411 160MHz [8086:2725] (rev 1a)
IOMMU Group 30:
	46:06.0 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Device [1022:43f5] (rev 01)
	4a:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. Killer E3000 2.5GbE Controller [10ec:3000] (rev 06)
IOMMU Group 31:
	46:07.0 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Device [1022:43f5] (rev 01)
	4b:00.0 SATA controller [0106]: ASMedia Technology Inc. ASM1062 Serial ATA Controller [1b21:0612] (rev 02)
IOMMU Group 32:
	46:08.0 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Device [1022:43f5] (rev 01)
	4c:00.0 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Device [1022:43f4] (rev 01)
	4d:00.0 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Device [1022:43f5] (rev 01)
	4d:04.0 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Device [1022:43f5] (rev 01)
	4d:05.0 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Device [1022:43f5] (rev 01)
	4d:06.0 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Device [1022:43f5] (rev 01)
	4d:07.0 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Device [1022:43f5] (rev 01)
	4d:08.0 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Device [1022:43f5] (rev 01)
	4d:0c.0 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Device [1022:43f5] (rev 01)
	4d:0d.0 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Device [1022:43f5] (rev 01)
	53:00.0 Non-Volatile memory controller [0108]: Micron/Crucial Technology P2 NVMe PCIe SSD [c0a9:540a] (rev 01)
	54:00.0 USB controller [0c03]: Advanced Micro Devices, Inc. [AMD] Device [1022:43f7] (rev 01)
	55:00.0 SATA controller [0106]: Advanced Micro Devices, Inc. [AMD] Device [1022:43f6] (rev 01)
IOMMU Group 33:
	46:0c.0 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Device [1022:43f5] (rev 01)
	56:00.0 USB controller [0c03]: Advanced Micro Devices, Inc. [AMD] Device [1022:43f7] (rev 01)
IOMMU Group 34:
	46:0d.0 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Device [1022:43f5] (rev 01)
	57:00.0 SATA controller [0106]: Advanced Micro Devices, Inc. [AMD] Device [1022:43f6] (rev 01)
IOMMU Group 35:
	58:00.0 Non-Volatile memory controller [0108]: Micron/Crucial Technology Device [c0a9:5407]
IOMMU Group 36:
	59:00.0 VGA compatible controller [0300]: Advanced Micro Devices, Inc. [AMD/ATI] Raphael [1002:164e] (rev c1)
IOMMU Group 37:
	59:00.1 Audio device [0403]: Advanced Micro Devices, Inc. [AMD/ATI] Rembrandt Radeon High Definition Audio Controller [1002:1640]
IOMMU Group 38:
	59:00.2 Encryption controller [1080]: Advanced Micro Devices, Inc. [AMD] VanGogh PSP/CCP [1022:1649]
IOMMU Group 39:
	59:00.3 USB controller [0c03]: Advanced Micro Devices, Inc. [AMD] Device [1022:15b6]
IOMMU Group 40:
	59:00.4 USB controller [0c03]: Advanced Micro Devices, Inc. [AMD] Device [1022:15b7]
IOMMU Group 41:
	59:00.6 Audio device [0403]: Advanced Micro Devices, Inc. [AMD] Family 17h/19h HD Audio Controller [1022:15e3]
IOMMU Group 42:
	5a:00.0 USB controller [0c03]: Advanced Micro Devices, Inc. [AMD] Device [1022:15b8]

As you can see from above although all CPU attached devices and some chipset attached devices are in their own groups the 2nd nvme drive that is attached to the chipset is bundled together with a USB and SATA controller. This does limit using the platform out of box for creating a system that can run 2 simultaneous guests with dedicated nvme and gpus passed through. Also of note is that for me passing through the last USB controller 5a:00.0 caused a system reboot (still investigating)

---

MSI PRO B650-P WIFI

@softwaretools

Here’s a MSI Pro B650-P IOMMU grouping:

1. IOMMU Group 0 00:01.0 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Device [1022:14da]
2. IOMMU Group 1 00:01.1 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Device [1022:14db]
3. IOMMU Group 2 00:01.2 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Device [1022:14db]
4. IOMMU Group 3 00:02.0 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Device [1022:14da]
5. IOMMU Group 4 00:02.1 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Device [1022:14db]
6. IOMMU Group 5 00:03.0 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Device [1022:14da]
7. IOMMU Group 6 00:04.0 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Device [1022:14da]
8. IOMMU Group 7 00:08.0 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Device [1022:14da]
9. IOMMU Group 8 00:08.1 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Device [1022:14dd]
10. IOMMU Group 9 00:08.3 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Device [1022:14dd]
11. IOMMU Group 10 00:14.0 SMBus [0c05]: Advanced Micro Devices, Inc. [AMD] FCH SMBus Controller [1022:790b] (rev 71)
12. IOMMU Group 10 00:14.3 ISA bridge [0601]: Advanced Micro Devices, Inc. [AMD] FCH LPC Bridge [1022:790e] (rev 51)
13. IOMMU Group 11 00:18.0 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Device [1022:14e0]
14. IOMMU Group 11 00:18.1 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Device [1022:14e1]
15. IOMMU Group 11 00:18.2 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Device [1022:14e2]
16. IOMMU Group 11 00:18.3 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Device [1022:14e3]
17. IOMMU Group 11 00:18.4 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Device [1022:14e4]
18. IOMMU Group 11 00:18.5 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Device [1022:14e5]
19. IOMMU Group 11 00:18.6 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Device [1022:14e6]
20. IOMMU Group 11 00:18.7 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Device [1022:14e7]
21. IOMMU Group 12 01:00.0 VGA compatible controller [0300]: NVIDIA Corporation GA106 [GeForce RTX 3060 Lite Hash Rate] [10de:2504] (rev a1)
22. IOMMU Group 12 01:00.1 Audio device [0403]: NVIDIA Corporation GA106 High Definition Audio Controller [10de:228e] (rev a1)
23. IOMMU Group 13 02:00.0 Non-Volatile memory controller [0108]: ADATA Technology Co., Ltd. XPG SX8200 Pro PCIe Gen3x4 M.2 2280 Solid State Drive [1cc1:8201] (rev 03)
24. IOMMU Group 14 03:00.0 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Device [1022:43f4] (rev 01)
25. IOMMU Group 15 04:00.0 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Device [1022:43f5] (rev 01)
26. IOMMU Group 16 04:04.0 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Device [1022:43f5] (rev 01)
27. IOMMU Group 17 04:05.0 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Device [1022:43f5] (rev 01)
28. IOMMU Group 18 04:06.0 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Device [1022:43f5] (rev 01)
29. IOMMU Group 18 08:00.0 SATA controller [0106]: ASMedia Technology Inc. Device [1b21:1064] (rev 02)
30. IOMMU Group 19 04:07.0 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Device [1022:43f5] (rev 01)
31. IOMMU Group 20 04:08.0 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Device [1022:43f5] (rev 01)
32. IOMMU Group 20 0a:00.0 InfiniBand [0c06]: Mellanox Technologies MT25408A0-FCC-QI ConnectX, Dual Port 40Gb/s InfiniBand / 10GigE Adapter IC with PCIe 2.0 x8 5.0GT/s In… (rev b0)
33. IOMMU Group 21 04:09.0 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Device [1022:43f5] (rev 01)
34. IOMMU Group 22 04:0a.0 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Device [1022:43f5] (rev 01)
35. IOMMU Group 22 0c:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8125 2.5GbE Controller [10ec:8125] (rev 05)
36. IOMMU Group 23 04:0b.0 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Device [1022:43f5] (rev 01)
37. IOMMU Group 23 0d:00.0 Network controller [0280]: MEDIATEK Corp. MT7922 802.11ax PCI Express Wireless Network Adapter [14c3:0616]
38. IOMMU Group 24 04:0c.0 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Device [1022:43f5] (rev 01)
39. IOMMU Group 24 0e:00.0 USB controller [0c03]: Advanced Micro Devices, Inc. [AMD] Device [1022:43f7] (rev 01)
40. IOMMU Group 25 04:0d.0 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Device [1022:43f5] (rev 01)
41. IOMMU Group 25 0f:00.0 SATA controller [0106]: Advanced Micro Devices, Inc. [AMD] Device [1022:43f6] (rev 01)
42. IOMMU Group 26 10:00.0 VGA compatible controller [0300]: Advanced Micro Devices, Inc. [AMD/ATI] Raphael [1002:164e] (rev c6)
43. IOMMU Group 27 10:00.1 Audio device [0403]: Advanced Micro Devices, Inc. [AMD/ATI] Rembrandt Radeon High Definition Audio Controller [1002:1640]
44. IOMMU Group 28 10:00.2 Encryption controller [1080]: Advanced Micro Devices, Inc. [AMD] VanGogh PSP/CCP [1022:1649]
45. IOMMU Group 29 10:00.3 USB controller [0c03]: Advanced Micro Devices, Inc. [AMD] Device [1022:15b6]
46. IOMMU Group 30 10:00.4 USB controller [0c03]: Advanced Micro Devices, Inc. [AMD] Device [1022:15b7]
47. IOMMU Group 31 10:00.6 Audio device [0403]: Advanced Micro Devices, Inc. [AMD] Family 17h/19h HD Audio Controller [1022:15e3]
48. IOMMU Group 32 11:00.0 USB controller [0c03]: Advanced Micro Devices, Inc. [AMD] Device [1022:15b8]

---

ASRock B650 LiveMixer

@qpok

It’s not perfect (only two SATA ports is a bit rubbish for example) but this board has been working out well for my first VFIO build.

This is with BIOS 1.18 but groups were the same and passthrough was working fine with 1.11 too (I haven’t tried the latest 1.20 beta):

# ./iommu-groups.sh 
IOMMU Group 0:
	00:01.0 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Device [1022:14da]
IOMMU Group 1:
	00:01.1 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Device [1022:14db]
IOMMU Group 2:
	00:01.2 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Device [1022:14db]
IOMMU Group 3:
	00:02.0 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Device [1022:14da]
IOMMU Group 4:
	00:02.1 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Device [1022:14db]
IOMMU Group 5:
	00:02.2 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Device [1022:14db]
IOMMU Group 6:
	00:03.0 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Device [1022:14da]
IOMMU Group 7:
	00:04.0 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Device [1022:14da]
IOMMU Group 8:
	00:08.0 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Device [1022:14da]
IOMMU Group 9:
	00:08.1 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Device [1022:14dd]
IOMMU Group 10:
	00:08.3 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Device [1022:14dd]
IOMMU Group 11:
	00:14.0 SMBus [0c05]: Advanced Micro Devices, Inc. [AMD] FCH SMBus Controller [1022:790b] (rev 71)
	00:14.3 ISA bridge [0601]: Advanced Micro Devices, Inc. [AMD] FCH LPC Bridge [1022:790e] (rev 51)
IOMMU Group 12:
	00:18.0 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Device [1022:14e0]
	00:18.1 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Device [1022:14e1]
	00:18.2 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Device [1022:14e2]
	00:18.3 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Device [1022:14e3]
	00:18.4 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Device [1022:14e4]
	00:18.5 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Device [1022:14e5]
	00:18.6 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Device [1022:14e6]
	00:18.7 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Device [1022:14e7]
IOMMU Group 13:
	01:00.0 VGA compatible controller [0300]: NVIDIA Corporation GM204 [GeForce GTX 970] [10de:13c2] (rev a1)
	01:00.1 Audio device [0403]: NVIDIA Corporation GM204 High Definition Audio Controller [10de:0fbb] (rev a1)
IOMMU Group 14:
	02:00.0 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD/ATI] Navi 10 XL Upstream Port of PCI Express Switch [1002:1478] (rev c7)
IOMMU Group 15:
	03:00.0 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD/ATI] Navi 10 XL Downstream Port of PCI Express Switch [1002:1479]
IOMMU Group 16:
	04:00.0 VGA compatible controller [0300]: Advanced Micro Devices, Inc. [AMD/ATI] Navi 24 [Radeon RX 6400/6500 XT/6500M] [1002:743f] (rev c7)
IOMMU Group 17:
	04:00.1 Audio device [0403]: Advanced Micro Devices, Inc. [AMD/ATI] Navi 21/23 HDMI/DP Audio Controller [1002:ab28]
IOMMU Group 18:
	05:00.0 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Device [1022:43f4] (rev 01)
IOMMU Group 19:
	06:00.0 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Device [1022:43f5] (rev 01)
IOMMU Group 20:
	06:04.0 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Device [1022:43f5] (rev 01)
IOMMU Group 21:
	06:06.0 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Device [1022:43f5] (rev 01)
	09:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8125 2.5GbE Controller [10ec:8125] (rev 05)
IOMMU Group 22:
	06:07.0 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Device [1022:43f5] (rev 01)
IOMMU Group 23:
	06:08.0 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Device [1022:43f5] (rev 01)
IOMMU Group 24:
	06:0c.0 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Device [1022:43f5] (rev 01)
	0c:00.0 USB controller [0c03]: Advanced Micro Devices, Inc. [AMD] Device [1022:43f7] (rev 01)
IOMMU Group 25:
	06:0d.0 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Device [1022:43f5] (rev 01)
	0d:00.0 SATA controller [0106]: Advanced Micro Devices, Inc. [AMD] Device [1022:43f6] (rev 01)
IOMMU Group 26:
	0e:00.0 Non-Volatile memory controller [0108]: Seagate Technology PLC FireCuda 530 SSD [1bb1:5018] (rev 01)
IOMMU Group 27:
	0f:00.0 VGA compatible controller [0300]: Advanced Micro Devices, Inc. [AMD/ATI] Raphael [1002:164e] (rev c1)
IOMMU Group 28:
	0f:00.1 Audio device [0403]: Advanced Micro Devices, Inc. [AMD/ATI] Rembrandt Radeon High Definition Audio Controller [1002:1640]
IOMMU Group 29:
	0f:00.2 Encryption controller [1080]: Advanced Micro Devices, Inc. [AMD] VanGogh PSP/CCP [1022:1649]
IOMMU Group 30:
	0f:00.3 USB controller [0c03]: Advanced Micro Devices, Inc. [AMD] Device [1022:15b6]
IOMMU Group 31:
	0f:00.4 USB controller [0c03]: Advanced Micro Devices, Inc. [AMD] Device [1022:15b7]
IOMMU Group 32:
	0f:00.6 Audio device [0403]: Advanced Micro Devices, Inc. [AMD] Family 17h/19h HD Audio Controller [1022:15e3]
IOMMU Group 33:
	10:00.0 USB controller [0c03]: Advanced Micro Devices, Inc. [AMD] Device [1022:15b8]

Practically speaking for the absurd number of USB ports, group #30 is the single USB-C port next to the ethernet port, group #31 is for the “lightning gaming” port nearest the edge and the single USB-B next to the ethernet and group #24 is for all the rest. Happily this works out pretty well for me.

Previous BIOS versions weren’t running stable with my RAM using the 6000 EXPO profile but 1.18 has given me no bother with that.

IMHO, I would probably go with the ASRock X670E Taichi for VFIO after all the IOMMU groupings that I’ve seen so far.