Question MSI MEG x570 Unify - Dual GPU (RTX 3090 / 3060) Setup

[enzorevo]

Hello, I'm struggling these days with this problem. I have a MSI MEG x570 Unify motherboard with the latest bios (the one released on May 2021) and it works pretty good with one of the upper mentioned RTXs (both with 3060 and 3090, in the PCIe_1 and PCIe_3 slot). However, if I put the two graphic cards together, only the central one (the one in the PCIe_3 slot) gets visibile (both in bios, or on devices in Windows). I tried to install also the more recent NVIDIA drivers on windows as a clean install, but no luck at all. What could the problem be?
I have an AMD Ryzen 5950X.

I have also tried to clear the CMOS, but no luck.

Thank you in advance.

 

[Lutfij]

Welcome to the forums, newcomer!

You must be using that rig for mining, if so, then you should be looking towards either your BIOS version of a riser cable. If you're hoping to enable SLI for those two cards populating the board, it's not worth it.

I have a MSI MEG x570 Unify motherboard with the latest bios (the one released on May 2021)
There are two BIOS listed under the year 2021;
https://www.msi.com/Motherboard/support/MEG-X570-UNIFY
which one do you have?

Make and model of your PSU and it's age?

 

[enzorevo]

Hi, thank you for your fast reply!

I'm not going to use SLI, since they're also different cards, and that should not work. Also, I'm not using it for mining, but for machine learning purposes.
My bios version is the latest: 7C35vA9

The PSU has 1 month of life, and it's a Bequiet 1200 W : https://www.bequiet.com/en/powersupply/1772