Gigabyte X570 Aorus Elite IOMMU groups?

The GPU usually is in its own group, sometimes together with their onboard sound chip. You don’t need to pass through the whole bus, just the card + sound.
Got the Aorus Pro and not Elite, but you may find an example useful nonetheless (older firmware). Second GPU got the HDMI sound in another group which you have to pass through together:

[...]
IOMMU Group 18:
	03:00.0 VGA compatible controller [0300]: NVIDIA Corporation NV40 [GeForce 6800 GT/GTO/Ultra] [10de:00f9] (rev a2)
[...]
IOMMU Group 22:
	0a:00.0 VGA compatible controller [0300]: Advanced Micro Devices, Inc. [AMD/ATI] Navi 10 [Radeon RX 5700 / 5700 XT] [1002:731f] (rev c1)
IOMMU Group 23:
	0a:00.1 Audio device [0403]: Advanced Micro Devices, Inc. [AMD/ATI] Navi 10 HDMI Audio [1002:ab38]
[...]

You can use this script to validate your IOMMU groups.
hardwareiommuids.sh.zip (316 Bytes)