GeForce RTX 5080 Ti not detected by motherboard or monitor

Graphics / Linux Linux
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1

Hello!

I’ve been trying to figure out what’s going on here for several hours and I think I’m stuck. Any advice you can share would be much appreciated

Primary Issue

  • GPU powers on (fans spin)
  • No video output from any GPU port (DisplayPort or HDMI)
  • System functions normally when using integrated graphics
  • GPU is not detected by the operating system

System Configuration

  • CPU: AMD Ryzen 5 7600X
  • Motherboard: MSI PRO B650M-P
  • RAM: DDR5 6000 (32GB / ~30GB usable)
  • PSU: Phanteks AMP GH 750W
  • OS: Pop!_OS

Hardware Checks Performed

  • GPU fully seated in PCIe slot (audible click confirmed)
  • PCIe power cables fully connected (dedicated PCIe cables used, not daisy-chained)
  • Tried all GPU display ports

System Behavior

  • System boots successfully using CPU integrated graphics
  • System remains stable without GPU installed
  • No crashes, restarts, or instability when GPU is removed
  • GPU fans spin on power-on

BIOS / Firmware

  • Updated motherboard BIOS to latest non-beta version
  • Cleared CMOS multiple times
  • Forced PCI-e slot to Gen3 mode

OS-Level Testing

  • Successfully booted into Linux live environment
  • System fully functional using integrated graphics
  • Ran lspci | grep -i nvidia with no results
  • About page in settings only identifies AMD Ryzen in Graphics
2

This strongly suggests either a hardware- or a firmware- level problem. Try rescanning the PCIe bus (echo 1 >/sys/bus/pci/rescan as root), if this doesn’t help then try a different PCIe slot, at least temporarily. If that doesn’t help either, test the GPU in another motherboard, if you have an access to such (like a friend’s computer or something…).