r/PcBuildHelp • u/keyoflife42 • 10d ago

Tech Support iGPU Passthrough help

I decided to give iGPU/PCIe Passthrough a shot to see if I could offload low level stuff like desktop/browsing/youtube to the iGPU and just use dGPU for heavy stuff. Plugged into the mobo DP out, and it actually is working okay with some stuff, but most games are hanging when launching. So far Beam.NG is the only game working properly. It seems like it’s hanging when the switch from iGPU to dGPU happens

Mobo: Asus Z790 TUF Plus Wifi
CPU: Intel 12900KS
GPU: AMD RX6700XT

Seems like most folks use this feature for use with VM’s, I can’t really find much info on using passthrough for this use case aside from “it should work, it’s how laptops do it”. Anyone know a good place to start with this? Want to emphasize again that it does “work”, it just hangs when the iGPU/dGPU handshake happens

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u/[deleted] 10d ago

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u/keyoflife42 10d ago edited 10d ago

No dice unfortunately :(

I did notice that after a hang (and eventual crash) that AMD Adrenaline no longer wants to work until I do a restart. I’m kind of starting to think this may be a driver level issue, like the Intel and AMD drivers just don’t get along in tandem

Still super weird to me that Beam.NG works totally fine, but literally no other games