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Graphics Cards not detected, rest of system runs fine

Upgraded my Graphics Card which hasn't caused trouble for a month.

Once I booted the PC one day, though, neither the recent nor the old GPU could be detected.

iGPU works fine.
The entire system boots without problems, the only issue being that there's no detected GPU.

Two Monitors, Two VGA Cables and two PSUs have been tested to no avail for neither of the two GPUs.
Both GPUs are being powered, fans running.

Booting with 1 RAM stick didn't change anything.
Troubleshooting page got me nowhere.
Dust is not an issue.
BIOS priority is at PCIe -> PCI -> iGPU.
Reseating of the GPUs has happened often enough.

What is causing my PC to not detect my GPU anymore?

Specs:
MBO: ASUS M2N-VM/S
PSU: CORSAIR VS450, 450W
CPU: AMD Athlon 64x 4800+, 2x2.5GHz
RAM: 4x1GB DDR2
GPU: Original: GeForce 210
New : GeForce GTX 960 4GB
Monitor: 16:9 24" LG 24M45HQ-B
OS: Windows 7
Reply to Icesterz
5 answers Last reply Best Answer
More about graphics cards detected rest system runs fine
  1. Did you try a different PCI-e slot?
    Reply to Darkseiders
  2. Darkseiders,

    This MoBo only has one PCI-e slot.
    Reply to Icesterz
  3. In that case, have you tried a different motherboard?
    Reply to Darkseiders
  4. No.

    With no secondary motherboard currently available to me, I won't be able to test that.
    Thank you, though, a fault with the motherboard could be the issue.
    I will attempt to find a motherboard to experiment on ASAP, although it might take a while.

    Are there by chance any software issues that could have caused this?
    I'm still unclear about how this coud just happen overnight.
    Reply to Icesterz
  5. Best answer
    It may have just failed, which can happen. Your motherboard seems to be a bit old, so it's probably nearing end of life.
    Reply to Darkseiders
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