I have server with 2 4090, motherboard: https://www.asus.com/motherboards-components/motherboards/proart/proart-z790-creator-wifi/techspec/, cpu: Intel i9 13900K. But my server doesn't see one of 4090.
(see on screen), but as i know, it should switch to 8x and 8x automatically.
It looks like your second 4090 is not being detected in the bios. To confirm, you have the second 4090 installed in the second pcie x16 slot?
Double check the pcie power cables are fully connected.
You could try setting all link speeds to Gen 4.
if it's still not detected, have you tested the second 4090 to be sure it's working?
Yes, the second 4090 installed in the second pcie x16 slot. We haven't tested gpus separately yet, but we have 2 identical servers and both of them see only one 4090, so it looks like problem with software or something like this.
I see your motherboard has a pcie bifurcation setting that can be enabled and adjusted.
The exact steps may vary depending on the motherboard model, but here are the general steps:
Thank you, it's some progress as you've got the "Not Present" to disappear.
May I ask what power supply you're using and how you have the pcie power cables connected to both RTX 4090's.
Thank you for the pictures, that is a very good power supply, platinum rated with two pcie 5.0 connectors and comes with two 12VHPWR pcie 5.0 cables.
Do you have an ssd installed in the M.2_1 slot? If so, set the link speed to Gen 4 as well.
If the second gpu is still showing x0, it would be good to test both gpu's in the first pcie x16 slot and test with both pcie 5.0 power cables.
Experiencing a Blue Screen of Death (BSOD) error on your computer could be due to various reasons, and having two sticks of RAM installed might not necessarily be the cause. BSOD errors are typically associated with hardware or software issues, and RAM is just one component that can contribute to these problems.
Here are some steps you can take to troubleshoot and address the issue:
Check for Loose or Improperly Seated RAM:
Run a Memory Test:
Update or Roll Back Drivers: