Hi so I just setup my Threadripper build this is the iommu groups on an ASRock X399 Taichi:
IOMMU Group 0 00:01.0 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Device [1022:1452]
IOMMU Group 10 00:19.0 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Device [1022:1460]
IOMMU Group 10 00:19.1 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Device [1022:1461]
IOMMU Group 10 00:19.2 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Device [1022:1462]
IOMMU Group 10 00:19.3 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Device [1022:1463]
IOMMU Group 10 00:19.4 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Device [1022:1464]
IOMMU Group 10 00:19.5 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Device [1022:1465]
IOMMU Group 10 00:19.6 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Device [1022:1466]
IOMMU Group 10 00:19.7 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Device [1022:1467]
IOMMU Group 11 01:00.0 USB controller [0c03]: Advanced Micro Devices, Inc. [AMD] Device [1022:43ba] (rev 02)
IOMMU Group 11 01:00.1 SATA controller [0106]: Advanced Micro Devices, Inc. [AMD] Device [1022:43b6] (rev 02)
IOMMU Group 11 01:00.2 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Device [1022:43b1] (rev 02)
IOMMU Group 11 02:00.0 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Device [1022:43b4] (rev 02)
IOMMU Group 11 02:04.0 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Device [1022:43b4] (rev 02)
IOMMU Group 11 02:05.0 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Device [1022:43b4] (rev 02)
IOMMU Group 11 02:06.0 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Device [1022:43b4] (rev 02)
IOMMU Group 11 02:07.0 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Device [1022:43b4] (rev 02)
IOMMU Group 11 04:00.0 Ethernet controller [0200]: Intel Corporation I211 Gigabit Network Connection [8086:1539] (rev 03)
IOMMU Group 11 05:00.0 Network controller [0280]: Intel Corporation Device [8086:24fb] (rev 10)
IOMMU Group 11 06:00.0 Ethernet controller [0200]: Intel Corporation I211 Gigabit Network Connection [8086:1539] (rev 03)
IOMMU Group 12 08:00.0 VGA compatible controller [0300]: NVIDIA Corporation GK104 [GeForce GTX 660 Ti] [10de:1183] (rev a1)
IOMMU Group 12 08:00.1 Audio device [0403]: NVIDIA Corporation GK104 HDMI Audio Controller [10de:0e0a] (rev a1)
IOMMU Group 13 40:01.0 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Device [1022:1452]
IOMMU Group 14 40:02.0 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Device [1022:1452]
IOMMU Group 15 40:03.0 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Device [1022:1452]
IOMMU Group 16 40:03.1 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Device [1022:1453]
IOMMU Group 17 40:04.0 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Device [1022:1452]
IOMMU Group 18 40:07.0 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Device [1022:1452]
IOMMU Group 18 40:07.1 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Device [1022:1454]
IOMMU Group 18 42:00.0 Non-Essential Instrumentation [1300]: Advanced Micro Devices, Inc. [AMD] Device [1022:145a]
IOMMU Group 18 42:00.2 Encryption controller [1080]: Advanced Micro Devices, Inc. [AMD] Device [1022:1456]
IOMMU Group 18 42:00.3 USB controller [0c03]: Advanced Micro Devices, Inc. [AMD] USB3 Host Controller [1022:145c]
IOMMU Group 19 40:08.0 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Device [1022:1452]
IOMMU Group 19 40:08.1 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Device [1022:1454]
IOMMU Group 19 43:00.0 Non-Essential Instrumentation [1300]: Advanced Micro Devices, Inc. [AMD] Device [1022:1455]
IOMMU Group 19 43:00.2 SATA controller [0106]: Advanced Micro Devices, Inc. [AMD] FCH SATA Controller [AHCI mode] [1022:7901] (rev 51)
IOMMU Group 1 00:01.1 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Device [1022:1453]
IOMMU Group 20 41:00.0 VGA compatible controller [0300]: NVIDIA Corporation GP104 [GeForce GTX 1070] [10de:1b81] (rev a1)
IOMMU Group 20 41:00.1 Audio device [0403]: NVIDIA Corporation GP104 High Definition Audio Controller [10de:10f0] (rev a1)
IOMMU Group 2 00:02.0 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Device [1022:1452]
IOMMU Group 3 00:03.0 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Device [1022:1452]
IOMMU Group 4 00:03.1 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Device [1022:1453]
IOMMU Group 5 00:04.0 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Device [1022:1452]
IOMMU Group 6 00:07.0 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Device [1022:1452]
IOMMU Group 6 00:07.1 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Device [1022:1454]
IOMMU Group 6 09:00.0 Non-Essential Instrumentation [1300]: Advanced Micro Devices, Inc. [AMD] Device [1022:145a]
IOMMU Group 6 09:00.2 Encryption controller [1080]: Advanced Micro Devices, Inc. [AMD] Device [1022:1456]
IOMMU Group 6 09:00.3 USB controller [0c03]: Advanced Micro Devices, Inc. [AMD] USB3 Host Controller [1022:145c]
IOMMU Group 7 00:08.0 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Device [1022:1452]
IOMMU Group 7 00:08.1 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Device [1022:1454]
IOMMU Group 7 0a:00.0 Non-Essential Instrumentation [1300]: Advanced Micro Devices, Inc. [AMD] Device [1022:1455]
IOMMU Group 7 0a:00.2 SATA controller [0106]: Advanced Micro Devices, Inc. [AMD] FCH SATA Controller [AHCI mode] [1022:7901] (rev 51)
IOMMU Group 8 00:14.0 SMBus [0c05]: Advanced Micro Devices, Inc. [AMD] FCH SMBus Controller [1022:790b] (rev 59)
IOMMU Group 8 00:14.3 ISA bridge [0601]: Advanced Micro Devices, Inc. [AMD] FCH LPC Bridge [1022:790e] (rev 51)
IOMMU Group 9 00:18.0 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Device [1022:1460]
IOMMU Group 9 00:18.1 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Device [1022:1461]
IOMMU Group 9 00:18.2 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Device [1022:1462]
IOMMU Group 9 00:18.3 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Device [1022:1463]
IOMMU Group 9 00:18.4 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Device [1022:1464]
IOMMU Group 9 00:18.5 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Device [1022:1465]
IOMMU Group 9 00:18.6 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Device [1022:1466]
IOMMU Group 9 00:18.7 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Device [1022:1467]
Are these any good?
My 660 Ti will be replaced by a 1030 in a few weeks, as I don’t need all the power of the 660 Ti within Linux.