Repairing a dead GTX 660Ti, need advice

[iamdarkyoshi]

I've bought a GTX 660Ti PCB off of ebay, listed as not working.

I've strapped a cooler onto it, and put it in an asrock motherboard as a secondary GPU.

The bios' system browser doesn't even detect anything in the pcie slot, and nvflash detects nothing.

I desoldered the bios chip, dumped it, and flashed a new bios from techpowerup's bios collection, one for the original card.

Put it back in, still the same result. I've checked the 0 ohm resistors/fuses, all are intact

What should I try next? None of the VRMs look visibly exploded...

[TiN]

Measure voltage on GPU, memory, aux rails?

[iamdarkyoshi]

Measure voltage on GPU, memory, aux rails?

How could I forget the number one rule? Thou shall check voltages!

[iamdarkyoshi]

Vcore 0.939
Vmem 1.605

These seem reasonable for an idle gpu.