EVGA GTX 660ti not being recognised by PC

[moket]

About a month ago the fan on my EVGA GTX 660ti stopped spinning. I RMA'd the card with EVGA and in the process of waiting for it to be sent back, I decided to buy another so I could still continue using my PC, with plans to upgrade to SLI later on.

I received the RMA'd card back from EVGA a couple of days ago. While the fan is now spinning, I can no longer get a display from it. The system boots up normally, however my monitors do not detect any signal. I have tried uninstalling and reinstalling drivers and upgrading my motherboards BIOS.

I am almost certain the card is not actually faulty because it works perfectly in another system with the exact same motherboard. If the motherboard is faulty then how come the replacement card I bought works flawlessly?

The RMA'd card also seems to work fine in the bottom PCIE slot, but not the top two.

The build I am having trouble with is:

i5 2500k oc'd to 4.5
Asus z77 Sabertooth
8GB of Kingston RAM
128 GB Samsung 830 SSD
750w Corsair HX+
2x EVGA GTX 660ti

TL DR GPU is not displaying an image. Works fine in another build.

 

[Xavier Tan Sync]

so you said it works well under the bottom part pcie and it's didn't work on the top 2 pcie slot? I assume it's the pcie slot problem.

 

[moket]

so you said it works well under the bottom part pcie and it's didn't work on the top 2 pcie slot? I assume it's the pcie slot problem.

But I have the other gtx 660ti which works fine in the system.

 

[akshayghai29785]

oh confusing

you new card work in the old pc with top slot but new replaced card doesnt work means neither you card or neither you mobo has problem correct me then it could be drivers issues redo the drivers & see if works but no other option i can think of

 

[Xavier Tan Sync]

try download the latest driver or revert your driver to your last time version.