Hi
Basically as title says, boots to x16 gen 3 despite being set to gen 4 or Auto in BIOS (ver. 4602 agesa 1208).
The 6900 XT was running Gen 4 before on an Aorus B550i
2x gen 3 NVME SSD's
Chipset drivers are up to date
Replaced Linkup gen 4 riser cable with a new one, no difference. Testing without riser is a giant hassle due to open loop w/ hard tubes... When I've had issues with riser cables in the past it's either just refused to post until set to gen 3, or been unstable if post was successful, which aligns with other people's experiences I've seen. GPU-Z reports the bus interface as x16 gen 4, so it shouldn't be that the riser (both of them) is so broken that the motherboard doesn't even register it as gen 4, right...?
Link state power management is off in Windows.
Are there any settings in BIOS that can affect this, any PCI power saving features or whatnot that isn't mentioned anywhere on the internet?
PC runs fine otherwise, OCCT power test 1h+, tm5 absolut config no errors, no WHEA errors, no stuttering, gaming is perfect, ReBAR works. Not missing much performance but since it isn't working as intended I want to work it out so there aren't any underlying issues that may become troublesome in the future.
Happy for any feedback on things I'm hopefully overlooking
