Return to Level1Techs.com

Why so few IOMMU groups on ASRock X470 Taichi?

I’m building up a new server on an ASRock X470 Taichi with a Ryzen 5 3600. When I check IOMMU it shows only 8 groups with both GPUs together in the same group. This doesn’t match several examples I’ve seen on this forum for the very same mobo (e.g. 20+ groups with GPUs in different ones).

I’ve read elsewhere that the BIOS and kernel can impact this, but after upgrading to the latest BIOS and moving to 5.3 I still see the same grouping.

Any ideas on why this may be? Is it the CPU limiting the groups?

For ref, below is what I see.

IOMMU Group 0 00:01.0 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Starship/Matisse PCIe Dummy Host Bridge [1022:1482]
IOMMU Group 0 00:01.1 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Starship/Matisse GPP Bridge [1022:1483]
IOMMU Group 0 00:01.3 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Starship/Matisse GPP Bridge [1022:1483]
IOMMU Group 0 01:00.0 Non-Volatile memory controller [0108]: Samsung Electronics Co Ltd NVMe SSD Controller SM981/PM981/PM983 [144d:a808]
IOMMU Group 0 02:00.0 USB controller [0c03]: Advanced Micro Devices, Inc. [AMD] Device [1022:43d0] (rev 01)
IOMMU Group 0 02:00.1 SATA controller [0106]: Advanced Micro Devices, Inc. [AMD] 400 Series Chipset SATA Controller [1022:43c8] (rev 01)
IOMMU Group 0 02:00.2 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] 400 Series Chipset PCIe Bridge [1022:43c6] (rev 01)
IOMMU Group 0 03:00.0 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] 400 Series Chipset PCIe Port [1022:43c7] (rev 01)
IOMMU Group 0 03:02.0 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] 400 Series Chipset PCIe Port [1022:43c7] (rev 01)
IOMMU Group 0 03:03.0 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] 400 Series Chipset PCIe Port [1022:43c7] (rev 01)
IOMMU Group 0 03:04.0 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] 400 Series Chipset PCIe Port [1022:43c7] (rev 01)
IOMMU Group 0 03:09.0 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] 400 Series Chipset PCIe Port [1022:43c7] (rev 01)
IOMMU Group 0 04:00.0 USB controller [0c03]: ASMedia Technology Inc. ASM2142 USB 3.1 Host Controller [1b21:2142]
IOMMU Group 0 05:00.0 SATA controller [0106]: ASMedia Technology Inc. ASM1062 Serial ATA Controller [1b21:0612] (rev 02)
IOMMU Group 0 06:00.0 PCI bridge [0604]: ASMedia Technology Inc. ASM1184e PCIe Switch Port [1b21:1184]
IOMMU Group 0 07:01.0 PCI bridge [0604]: ASMedia Technology Inc. ASM1184e PCIe Switch Port [1b21:1184]
IOMMU Group 0 07:03.0 PCI bridge [0604]: ASMedia Technology Inc. ASM1184e PCIe Switch Port [1b21:1184]
IOMMU Group 0 07:05.0 PCI bridge [0604]: ASMedia Technology Inc. ASM1184e PCIe Switch Port [1b21:1184]
IOMMU Group 0 07:07.0 PCI bridge [0604]: ASMedia Technology Inc. ASM1184e PCIe Switch Port [1b21:1184]
IOMMU Group 0 08:00.0 Network controller [0280]: Intel Corporation Dual Band Wireless-AC 3168NGW [Stone Peak] [8086:24fb] (rev 10)
IOMMU Group 0 0a:00.0 Ethernet controller [0200]: Intel Corporation I211 Gigabit Network Connection [8086:1539] (rev 03)
IOMMU Group 1 00:02.0 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Starship/Matisse PCIe Dummy Host Bridge [1022:1482]
IOMMU Group 2 00:03.0 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Starship/Matisse PCIe Dummy Host Bridge [1022:1482]
IOMMU Group 2 00:03.1 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Starship/Matisse GPP Bridge [1022:1483]
IOMMU Group 2 00:03.2 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Starship/Matisse GPP Bridge [1022:1483]
IOMMU Group 2 0e:00.0 VGA compatible controller [0300]: NVIDIA Corporation NV44 [GeForce 6200 LE] [10de:0163] (rev a1)
IOMMU Group 2 0f:00.0 VGA compatible controller [0300]: NVIDIA Corporation Device [10de:1e89] (rev a1)
IOMMU Group 2 0f:00.1 Audio device [0403]: NVIDIA Corporation Device [10de:10f8] (rev a1)
IOMMU Group 2 0f:00.2 USB controller [0c03]: NVIDIA Corporation Device [10de:1ad8] (rev a1)
IOMMU Group 2 0f:00.3 Serial bus controller [0c80]: NVIDIA Corporation Device [10de:1ad9] (rev a1)
IOMMU Group 3 00:04.0 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Starship/Matisse PCIe Dummy Host Bridge [1022:1482]
IOMMU Group 4 00:05.0 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Starship/Matisse PCIe Dummy Host Bridge [1022:1482]
IOMMU Group 5 00:07.0 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Starship/Matisse PCIe Dummy Host Bridge [1022:1482]
IOMMU Group 5 00:07.1 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Starship/Matisse Internal PCIe GPP Bridge 0 to bus[E:B] [1022:1484]
IOMMU Group 5 10:00.0 Non-Essential Instrumentation [1300]: Advanced Micro Devices, Inc. [AMD] Starship/Matisse PCIe Dummy Function [1022:148a]
IOMMU Group 6 00:08.0 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Starship/Matisse PCIe Dummy Host Bridge [1022:1482]
IOMMU Group 6 00:08.1 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Starship/Matisse Internal PCIe GPP Bridge 0 to bus[E:B] [1022:1484]
IOMMU Group 6 00:08.2 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Starship/Matisse Internal PCIe GPP Bridge 0 to bus[E:B] [1022:1484]
IOMMU Group 6 00:08.3 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Starship/Matisse Internal PCIe GPP Bridge 0 to bus[E:B] [1022:1484]
IOMMU Group 6 11:00.0 Non-Essential Instrumentation [1300]: Advanced Micro Devices, Inc. [AMD] Starship/Matisse Reserved SPP [1022:1485]
IOMMU Group 6 11:00.1 Encryption controller [1080]: Advanced Micro Devices, Inc. [AMD] Starship/Matisse Cryptographic Coprocessor PSPCPP [1022:1486]
IOMMU Group 6 11:00.3 USB controller [0c03]: Advanced Micro Devices, Inc. [AMD] Matisse USB 3.0 Host Controller [1022:149c]
IOMMU Group 6 11:00.4 Audio device [0403]: Advanced Micro Devices, Inc. [AMD] Starship/Matisse HD Audio Controller [1022:1487]
IOMMU Group 6 12:00.0 SATA controller [0106]: Advanced Micro Devices, Inc. [AMD] FCH SATA Controller [AHCI mode] [1022:7901] (rev 51)
IOMMU Group 6 13:00.0 SATA controller [0106]: Advanced Micro Devices, Inc. [AMD] FCH SATA Controller [AHCI mode] [1022:7901] (rev 51)
IOMMU Group 7 00:14.0 SMBus [0c05]: Advanced Micro Devices, Inc. [AMD] FCH SMBus Controller [1022:790b] (rev 61)
IOMMU Group 7 00:14.3 ISA bridge [0601]: Advanced Micro Devices, Inc. [AMD] FCH LPC Bridge [1022:790e] (rev 51)
IOMMU Group 8 00:18.0 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Matisse Device 24: Function 0 [1022:1440]
IOMMU Group 8 00:18.1 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Matisse Device 24: Function 1 [1022:1441]
IOMMU Group 8 00:18.2 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Matisse Device 24: Function 2 [1022:1442]
IOMMU Group 8 00:18.3 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Matisse Device 24: Function 3 [1022:1443]
IOMMU Group 8 00:18.4 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Matisse Device 24: Function 4 [1022:1444]
IOMMU Group 8 00:18.5 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Matisse Device 24: Function 5 [1022:1445]
IOMMU Group 8 00:18.6 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Matisse Device 24: Function 6 [1022:1446]
IOMMU Group 8 00:18.7 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Matisse Device 24: Function 7 [1022:1447]

It looks like the IOMMU groups your seeing online are using a kernel with the ACS override patch applied which will make more groups available to you at the risk of possible hardware stability. My x370 Taichi has a similar group layout as your board before I apply the patch.

https://lkml.org/lkml/2013/5/30/513

How you go about patching your kernel depends on what distribution your using with some people already maintaining patched kernels you can install with your package manager or if you are feeling adventurous you could patch and compile the kernel yourself.

https://queuecumber.gitlab.io/linux-acs-override/

Often times the “latest” BIOS usually make a step or two backwards in terms of advanced features like IOMMU groups. Load up the earliest bios you can find that has support for your Zen 2 CPU and go from there.

ACS patch can help, but it’s not without its pit-falls.

Have you manually set IOMMU to Enabled in the BIOS?

Enable these:


I get:

IOMMU Group 0:
	00:01.0 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 00h-1fh) PCIe Dummy Host Bridge [1022:1452]
IOMMU Group 1:
	00:01.1 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 00h-0fh) PCIe GPP Bridge [1022:1453]
IOMMU Group 10:
	00:08.0 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 00h-1fh) PCIe Dummy Host Bridge [1022:1452]
IOMMU Group 11:
	00:08.1 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 00h-0fh) Internal PCIe GPP Bridge 0 to Bus B [1022:1454]
IOMMU Group 12:
	00:14.0 SMBus [0c05]: Advanced Micro Devices, Inc. [AMD] FCH SMBus Controller [1022:790b] (rev 59)
	00:14.3 ISA bridge [0601]: Advanced Micro Devices, Inc. [AMD] FCH LPC Bridge [1022:790e] (rev 51)
IOMMU Group 13:
	00:18.0 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 00h-0fh) Data Fabric: Device 18h; Function 0 [1022:1460]
	00:18.1 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 00h-0fh) Data Fabric: Device 18h; Function 1 [1022:1461]
	00:18.2 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 00h-0fh) Data Fabric: Device 18h; Function 2 [1022:1462]
	00:18.3 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 00h-0fh) Data Fabric: Device 18h; Function 3 [1022:1463]
	00:18.4 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 00h-0fh) Data Fabric: Device 18h; Function 4 [1022:1464]
	00:18.5 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 00h-0fh) Data Fabric: Device 18h; Function 5 [1022:1465]
	00:18.6 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 00h-0fh) Data Fabric: Device 18h; Function 6 [1022:1466]
	00:18.7 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 00h-0fh) Data Fabric: Device 18h; Function 7 [1022:1467]
IOMMU Group 14:
	01:00.0 Non-Volatile memory controller [0108]: Sandisk Corp WD Black NVMe SSD [15b7:5001]
IOMMU Group 15:
	02:00.0 USB controller [0c03]: Advanced Micro Devices, Inc. [AMD] Device [1022:43d0] (rev 01)
	02:00.1 SATA controller [0106]: Advanced Micro Devices, Inc. [AMD] 400 Series Chipset SATA Controller [1022:43c8] (rev 01)
	02:00.2 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] 400 Series Chipset PCIe Bridge [1022:43c6] (rev 01)
	03:00.0 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] 400 Series Chipset PCIe Port [1022:43c7] (rev 01)
	03:02.0 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] 400 Series Chipset PCIe Port [1022:43c7] (rev 01)
	03:03.0 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] 400 Series Chipset PCIe Port [1022:43c7] (rev 01)
	03:04.0 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] 400 Series Chipset PCIe Port [1022:43c7] (rev 01)
	03:09.0 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] 400 Series Chipset PCIe Port [1022:43c7] (rev 01)
	04:00.0 USB controller [0c03]: ASMedia Technology Inc. ASM2142 USB 3.1 Host Controller [1b21:2142]
	05:00.0 SATA controller [0106]: ASMedia Technology Inc. ASM1062 Serial ATA Controller [1b21:0612] (rev 02)
	06:00.0 PCI bridge [0604]: ASMedia Technology Inc. ASM1184e PCIe Switch Port [1b21:1184]
	07:01.0 PCI bridge [0604]: ASMedia Technology Inc. ASM1184e PCIe Switch Port [1b21:1184]
	07:03.0 PCI bridge [0604]: ASMedia Technology Inc. ASM1184e PCIe Switch Port [1b21:1184]
	07:05.0 PCI bridge [0604]: ASMedia Technology Inc. ASM1184e PCIe Switch Port [1b21:1184]
	07:07.0 PCI bridge [0604]: ASMedia Technology Inc. ASM1184e PCIe Switch Port [1b21:1184]
	08:00.0 Network controller [0280]: Intel Corporation Dual Band Wireless-AC 3168NGW [Stone Peak] [8086:24fb] (rev 10)
	0a:00.0 Ethernet controller [0200]: Intel Corporation I211 Gigabit Network Connection [8086:1539] (rev 03)
IOMMU Group 16:
	0e:00.0 VGA compatible controller [0300]: Advanced Micro Devices, Inc. [AMD/ATI] Ellesmere [Radeon RX 470/480/570/570X/580/580X/590] [1002:67df] (rev e7)
	0e:00.1 Audio device [0403]: Advanced Micro Devices, Inc. [AMD/ATI] Ellesmere HDMI Audio [Radeon RX 470/480 / 570/580/590] [1002:aaf0]
IOMMU Group 17:
	0f:00.0 VGA compatible controller [0300]: NVIDIA Corporation GM200 [GeForce GTX 980 Ti] [10de:17c8] (rev a1)
	0f:00.1 Audio device [0403]: NVIDIA Corporation GM200 High Definition Audio [10de:0fb0] (rev a1)
IOMMU Group 18:
	10:00.0 Non-Essential Instrumentation [1300]: Advanced Micro Devices, Inc. [AMD] Zeppelin/Raven/Raven2 PCIe Dummy Function [1022:145a]
IOMMU Group 19:
	10:00.2 Encryption controller [1080]: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 00h-0fh) Platform Security Processor [1022:1456]
IOMMU Group 2:
	00:01.3 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 00h-0fh) PCIe GPP Bridge [1022:1453]
IOMMU Group 20:
	10:00.3 USB controller [0c03]: Advanced Micro Devices, Inc. [AMD] Zeppelin USB 3.0 Host controller [1022:145f]
IOMMU Group 21:
	11:00.0 Non-Essential Instrumentation [1300]: Advanced Micro Devices, Inc. [AMD] Zeppelin/Renoir PCIe Dummy Function [1022:1455]
IOMMU Group 22:
	11:00.2 SATA controller [0106]: Advanced Micro Devices, Inc. [AMD] FCH SATA Controller [AHCI mode] [1022:7901] (rev 51)
IOMMU Group 23:
	11:00.3 Audio device [0403]: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 00h-0fh) HD Audio Controller [1022:1457]
IOMMU Group 3:
	00:02.0 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 00h-1fh) PCIe Dummy Host Bridge [1022:1452]
IOMMU Group 4:
	00:03.0 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 00h-1fh) PCIe Dummy Host Bridge [1022:1452]
IOMMU Group 5:
	00:03.1 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 00h-0fh) PCIe GPP Bridge [1022:1453]
IOMMU Group 6:
	00:03.2 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 00h-0fh) PCIe GPP Bridge [1022:1453]
IOMMU Group 7:
	00:04.0 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 00h-1fh) PCIe Dummy Host Bridge [1022:1452]
IOMMU Group 8:
	00:07.0 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 00h-1fh) PCIe Dummy Host Bridge [1022:1452]
IOMMU Group 9:
	00:07.1 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 00h-0fh) Internal PCIe GPP Bridge 0 to Bus B [1022:1454]
1 Like

Thanks for the suggestions!

Unfortunately with this mobo I had to upgrade the BIOS to support my processor and it’s a one-way street (can’t downgrade) according to ASRock.

I don’t have the ACS option enabled in the BIOS, so I’ll try that (when I’m back in front of my box in a coulpe days).

Otherwise, I’m starting to think I need support directly from ASRock based on a thread I saw on reddit (titled “Tech support sent you a beta BIOS? Post it here!”). There seems to be a lot of ongoing patching w.r.t. X470 and ASRock BIOS. Having a new processor probably isn’t helping me.

ACS is the option that does the splitting up of the groups. That will resolve your issue. I use Beta 3.77 but the groups have not changed at all for the past 5 versions I’ve gone through.

“It stands for Access Control Services and disabling/enabling it toggles the ability to disable peer-to-peer transactions between PCIe devices, allowing IOMMU group separation.”

In case you forget where to navigate to see the option it does show the location in the top of the screenshots I took.
Advanced > AMD CBS > NBIO Common Options for ACS Enable
Advanced > AMD CBS > NBIO Common Options > NB Configuration for IOMMU Enable

@pantato, okay ACS enable in BIOS did the trick. Thanks!

However, I was surprised how different my BIOS menu options were relative to yours. With the defaults, I didn’t even have the ACS option:

IMG_1856

But then it appeared after enabling “AER Cap”:

IMG_1857

Did the beta BIOS upgrades expose all these extra options? Or I wonder if options are being gated for me based on the CPU type.

I also still have fewer groups (16) than I’ve seen in other posts for the same board (including here!). But the key thing for me is that the GPUs are now separated, as well as the NVMe, so I’ll live with that.

But any idea why the grouping on my machine is so different? I’m leaning towards the CPU micro-architecture being the culprit (Zen 2 in my case). Maybe a lower-end Ryzen 5 has poorer grouping than say a 7 or 9.

For ref, here’s what I have now:

IOMMU Group 0 00:01.0 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Device [1022:1482]
IOMMU Group 10 00:08.0 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Device [1022:1482]
IOMMU Group 10 00:08.1 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Device [1022:1484]
IOMMU Group 10 00:08.2 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Device [1022:1484]
IOMMU Group 10 00:08.3 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Device [1022:1484]
IOMMU Group 10 11:00.0 Non-Essential Instrumentation [1300]: Advanced Micro Devices, Inc. [AMD] Device [1022:1485]
IOMMU Group 10 11:00.1 Encryption controller [1080]: Advanced Micro Devices, Inc. [AMD] Device [1022:1486]
IOMMU Group 10 11:00.3 USB controller [0c03]: Advanced Micro Devices, Inc. [AMD] Device [1022:149c]
IOMMU Group 10 11:00.4 Audio device [0403]: Advanced Micro Devices, Inc. [AMD] Device [1022:1487]
IOMMU Group 10 12:00.0 SATA controller [0106]: Advanced Micro Devices, Inc. [AMD] FCH SATA Controller [AHCI mode] [1022:7901] (rev 51)
IOMMU Group 10 13:00.0 SATA controller [0106]: Advanced Micro Devices, Inc. [AMD] FCH SATA Controller [AHCI mode] [1022:7901] (rev 51)
IOMMU Group 11 00:14.0 SMBus [0c05]: Advanced Micro Devices, Inc. [AMD] FCH SMBus Controller [1022:790b] (rev 61)
IOMMU Group 11 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 [1022:1440]
IOMMU Group 12 00:18.1 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Device [1022:1441]
IOMMU Group 12 00:18.2 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Device [1022:1442]
IOMMU Group 12 00:18.3 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Device [1022:1443]
IOMMU Group 12 00:18.4 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Device [1022:1444]
IOMMU Group 12 00:18.5 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Device [1022:1445]
IOMMU Group 12 00:18.6 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Device [1022:1446]
IOMMU Group 12 00:18.7 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Device [1022:1447]
IOMMU Group 13 01:00.0 Non-Volatile memory controller [0108]: Samsung Electronics Co Ltd Device [144d:a804]
IOMMU Group 14 02:00.0 USB controller [0c03]: Advanced Micro Devices, Inc. [AMD] Device [1022:43d0] (rev 01)
IOMMU Group 14 02:00.1 SATA controller [0106]: Advanced Micro Devices, Inc. [AMD] Device [1022:43c8] (rev 01)
IOMMU Group 14 02:00.2 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Device [1022:43c6] (rev 01)
IOMMU Group 14 03:00.0 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Device [1022:43c7] (rev 01)
IOMMU Group 14 03:02.0 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Device [1022:43c7] (rev 01)
IOMMU Group 14 03:03.0 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Device [1022:43c7] (rev 01)
IOMMU Group 14 03:04.0 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Device [1022:43c7] (rev 01)
IOMMU Group 14 03:09.0 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Device [1022:43c7] (rev 01)
IOMMU Group 14 04:00.0 USB controller [0c03]: ASMedia Technology Inc. Device [1b21:2142]
IOMMU Group 14 05:00.0 SATA controller [0106]: ASMedia Technology Inc. ASM1062 Serial ATA Controller [1b21:0612] (rev 02)
IOMMU Group 14 06:00.0 PCI bridge [0604]: ASMedia Technology Inc. Device [1b21:1184]
IOMMU Group 14 07:01.0 PCI bridge [0604]: ASMedia Technology Inc. Device [1b21:1184]
IOMMU Group 14 07:03.0 PCI bridge [0604]: ASMedia Technology Inc. Device [1b21:1184]
IOMMU Group 14 07:05.0 PCI bridge [0604]: ASMedia Technology Inc. Device [1b21:1184]
IOMMU Group 14 07:07.0 PCI bridge [0604]: ASMedia Technology Inc. Device [1b21:1184]
IOMMU Group 14 08:00.0 Network controller [0280]: Intel Corporation Device [8086:24fb] (rev 10)
IOMMU Group 14 0a:00.0 Ethernet controller [0200]: Intel Corporation I211 Gigabit Network Connection [8086:1539] (rev 03)
IOMMU Group 14 0c:00.0 Non-Volatile memory controller [0108]: Samsung Electronics Co Ltd Device [144d:a808]
IOMMU Group 15 0e:00.0 VGA compatible controller [0300]: NVIDIA Corporation NV44 [GeForce 6200 LE] [10de:0163] (rev a1)
IOMMU Group 16 0f:00.0 VGA compatible controller [0300]: NVIDIA Corporation Device [10de:1e89] (rev a1)
IOMMU Group 16 0f:00.1 Audio device [0403]: NVIDIA Corporation Device [10de:10f8] (rev a1)
IOMMU Group 16 0f:00.2 USB controller [0c03]: NVIDIA Corporation Device [10de:1ad8] (rev a1)
IOMMU Group 16 0f:00.3 Serial bus controller [0c80]: NVIDIA Corporation Device [10de:1ad9] (rev a1)
IOMMU Group 1 00:01.1 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Device [1022:1483]
IOMMU Group 2 00:01.3 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Device [1022:1483]
IOMMU Group 3 00:02.0 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Device [1022:1482]
IOMMU Group 4 00:03.0 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Device [1022:1482]
IOMMU Group 5 00:03.1 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Device [1022:1483]
IOMMU Group 6 00:03.2 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Device [1022:1483]
IOMMU Group 7 00:04.0 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Device [1022:1482]
IOMMU Group 8 00:05.0 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Device [1022:1482]
IOMMU Group 9 00:07.0 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Device [1022:1482]
IOMMU Group 9 00:07.1 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Device [1022:1484]
IOMMU Group 9 10:00.0 Non-Essential Instrumentation [1300]: Advanced Micro Devices, Inc. [AMD] Device [1022:148a]

huh, that’s weird. When I enable ACS on mine, it auto disables ACS cap. Can you disable ACS cap after enabling ACS? Might allow for further expansion. It’s weird because I am fairly sure my menu has been pretty much the same for the past 3-4 updates. Maybe it’s having OC mode on in the first OC tweak menu? Very weird. Anyway, I think you definitely want the beta bios if you have Ryzen 3000, unless by zen 2 you meant zen+. For reference I have the 2700x.

EDIT: Actually I do remember the menu looking like that. Although it was a few versions ago. Which version do you have?

I’m on BIOS 3.60 for now (I know I need to update). CPU is 3600 (Zen 2 / Matisse).

Was waiting for a non-beta, and it looks like it’s finally out!

There’s now an official 3.90 on the ASRock site. Hopefully somebody can confirm that it actually works for GPU pass-through, then I’ll upgrade to that.

Make a backup of what you have now and go for it! Unless it’s one of those darned one-way upgrades.

I don’t think you have to worry about future BIOS updates bricking passthrough. Not on AM4, at least.

EDIT: Just updated to 3.90 to confirm. Works fine.

Please see the FLR patch to actually get usb/audio passthrough working now that you updated your bios. Attention: FLR Kernel Patch fixes USB/Audio passthrough issues on AGESA 1.0.0.4B

1 Like