4 graphic card on PRO WS WRX80E- SAGE SE WIFI

[az0966]

I built PC with motherboard PRO WS WRX80E- SAGE SE WIFI and CPU AMD Ryzen Threadripper PRO 5955WX. I only can start 3 Graphic card Gigabyte 4090 on this main together Ubuntu , I see in manual it can support 4 x pcie x16 on 4-way configuration. but I don't know how to config. Anyone can help me ?

[Nate152]

That's awesome, good to hear you're able to use 6 Nvidia gpu's.

I think only you can say it will work with some more testing.

Let us know how it goes.

By the way, what 6 Nvidia gpu's are you using and which slots are you using to connect them?

[az0966]

I have 4 x 4090, 1 x 3090, and 1x 3060, all of them are PCIe gen 4, I use Ubuntu 24.04 desktop, with 4 card slots must be 1, 3, 5, 7. With 6 cards I used slots 1,3,5,7, 4, 6. nvidia-smi and nvtop show 6 cards with exactly names and power.

[Nate152]

Wow, very nice.

You can check in the bios to see if all 6 gpu's are running at pcie 4.0. If they're not, you may be able to manually set them to Gen 4.

[az0966]

I set PCIe auto in BIOS, I will try to force them to gen 4