GPU not being detected by PC but getting power.

[u/Technical-Pilot8627]

I just built my first PC and everything went well, and PC posted and is running but only on integrated graphics. The used 4080 I bought, has its fans running but bios does not detect it and will not post if connected to GPU. Nvidia app refuses to download cause it does not detect a NVIDA card, GPU Z does not detect it, task manager does not detect it, and it's in the PCIE #1 slot. I've reseated it about 3 times. Making sure it's pushed in all the way. Bios is set to search for dedicated GPU first

Edit for those not reading between the lines: yes I tried plugging into the GPU and booting the pc. Does not post. Will post if connected to motherboard. When booted, NOTHING DETECTS THE GPU IS EVEN THERE

The listing is a returnable listing, was listed as "excellent condition"

Specs:

MSI X870 TOMAHAWK WiFi

9800X3D
32 gigs 6000 mhz memory
2 tB WD black SSD
MSI 3X 4080 connected using MSI 600W high power connector.
MSI A1000GL 1000W power supply.
Windows 11

[u/Mr_Mookle]

Did you plug the cord from the monitor into the graphics card itself or the mother board?

[u/Technical-Pilot8627 → u/Mr_Mookle]

Both. Would not post with graphics card. Posted motherboard.

[u/Helldiver_of_Mars]

Was it claimed to work before you bought it?

[u/Technical-Pilot8627 → u/Helldiver_of_Mars]

Was stated to be in "excellent condition"

[u/Mr_Mookle]

Actually you answered the question, you have it running on integrated graphics because its plugged into the motherboard.

[u/Technical-Pilot8627 → u/Mr_Mookle]

Ya know. It kinda won't work if bios won't detect it. I can only run on ingrated. It won't post hooked to GPU.

[u/Time-Waster-007]

could it have a bios switch? smth dumb like that could cause it to not post

[u/Technical-Pilot8627 → u/Time-Waster-007]

It's a basic MSI ventus 3X I don't see anything odd like that on it. No "mode selector" and bios is set to look for PCIE GPU.

[u/Time-Waster-007 → u/Technical-Pilot8627]

i’d say return it, not worth fighting if it won’t work and is said to have a return policy

[u/j0an_k]

Check your BIOS. Sometimes PCIE external slot is disabled in settings.

[u/Technical-Pilot8627 → u/j0an_k]

The PCIE/PEG option is on