VFIO passthrough results

This topic is an attempt to gather results with VFIO passthrough on different motherboards and GPUs with QEMU for AmigaOS. If you managed to get it work please post:

motherboard, host CPU (model name from /proc/cpuinfo) and GPU type (lspci -vvnn output for the graphics card and its other functions like audio)
firmware settings you needed to change
host Linux version (distro version and uname -a output)
QEMU version and -machine option used
Link to benchmark results or if it was usable or not and what else you had to change such as INTERRUPT=no monitor file tool type or other symptoms you saw.

These infos may be in previous threads scattered around but it's hard to find and compare them and I won't go through all those threads to get them. So let's try to make one thread for this. To keep it organised please everybody make only one post (edit later if needed or add multiple results in same post if you tried more than one machine or GPU) and stay on topic so do not post anything else here just the data above.

Additional important info to be added from the guest OS:
Do you use INTERRUPT=Yes (default) or INTERRUPT=No (or NOINTERRUPT=Yes, which is the same, and was used in older versions instead but probably still is supported) in your DEVS:Monitors/Radeon icon ToolTypes?

Does anyone know if the QEMU vfio passthrough works with the SAM460 version machine version and the OS4.1FE for SAM?

QEmu 10 + GPU Passthrough on Ubuntu:

My System:
- Intel Core i5-7500 (LGA1151)
- Gigabyte Z170X Gaming 7 (IGP)
- 16GB DDR4 Ram
- Sapphire R9 270X 2GB
- IGP Intel HD Graphics 630

GfxBench2D - with R9 270x 2G
http://hdrlab.org.nz/Benchmark/GfxBench2D/Result/2942

GfxBench2D - with HD6950 1G
http://hdrlab.org.nz/Benchmark/GfxBench2D/Result/2943

Quake 2 with R9 270x:

640x480 GL4ES Fullscreen
- 40.2 fps

800x600 GL4ES Fullscreen
- 40.3 fps

1024x768 GL4ES Fullscreen
- 38.5 fps

1920x1080 GL4ES Fullscreen
- 36.3 fps