GPU? PCIex? PSU?

[znsprk]

So for.. 2 years or so I've been using my 660ti with no problem powered on my 500w antec. About a month ago I went on vacation and just came back with my pc not even passing post. So I breadboard, checking step by step starting from 1 ram stick then 2 sticks and it works until I reach 3rd step and plugged in my 660ti and it won't post anymore. Tried different pci slots and still the same.
I tested on an old HD5770 Sapphire and everything seemed to past post but no display.

Unfortunately, I don't have an xtra psu to test

It's hard to see what is the problem because it was all working before I went on vacation. Thoughts?

Specs
HyperX 8gbx2 ASUS Z97 Mobo GTX 660ti Standard 500w Antec PSU

 

[clutchc]

Guessing from afar, I'd say the M/B died. But w/o trying a know-good PSU, you won't know for sure. Does it produce a display using the iGPU (no card in the PCIe slot)?

 

[znsprk]

Guessing from afar, I'd say the M/B died. But w/o trying a know-good PSU, you won't know for sure. Does it produce a display using the iGPU (no card in the PCIe slot)?

Yes it does work with iGPU. today I tried it on another mobo which is a gigabyte and they have the same problem. I've used 3 gpus now and they all have the same results for each of the two mobos. I'm really guessing it's not the mobo

 

[clutchc]

Could still be a bad M/B that is killing the cards. Or the PSU that is killing them. Or the PSU is the culprit if you are using the same PSU for all testing, and the cards and board are still fine. You almost need a complete separate system of devices to use for troubleshooting.
If the PSU is new, it is less likely it is the PSU that is at fault, tho.

 

[znsprk]

Could still be a bad M/B that is killing the cards. Or the PSU that is killing them. Or the PSU is the culprit if you are using the same PSU for all testing, and the cards and board are still fine. You almost need a complete separate system of devices to use for troubleshooting.
If the PSU is new, it is less likely it is the PSU that is at fault, tho.

I think it's my PSU (crosses fingers cause it's cheaper to replace) because it's the only hardware that I don't have a spare to compare from. I used one PSU for both tests on my 2 mbs and 3 gpus.