But the question is why is my other 3090 card signed as ga 102
Did you flash the bios and failed? If you didn’t, try it and post a screenshot with the results here. Also, post a screenshot with nvidia-info and nvidia-smi commands results here.
I tried to flash it and failed and nvidia-info is showing just one card
One card is connected directly on the mobo and the other one is on the riser and pci slot žy mobo is asrock b460 phantom gaming 4
Reboot, try reflashing it again, be patient until it finishes.
I will give it a go but i dont expect much
Nothing changed
So GPU1 doesn’t get recognised? Checked the power, USB cable, riser, splitter, all connected correctly? Post some pics.
I will later
Tried changing the riser and USB cable?
Twice
Also tried to change the PCIe slot? Swap the cards, connect the dead one straight into the MOBO, disconnect the other one, see if it works?
Mobo is the latest version on the BIOS flash?
I did everything you said, but i think the problem is in this: I connected one of my 3090 in the main pcie slot and other one in pcie with the riser, tommorow i will try to put both cards on the risers
Still nothing
Load just one GPU at a time, see if it is seen.
Bios settings, make sure PCIe is set on gen 2 or 3, 4G is also enabled.
When i load one by one it is seen normally 4g is enabled
your problem is related to pci-express.zotac graphics cards dont accept other PCI-express.so you can use the card i showed in the picture,this will fix the problem.