Weird problem with GTX760

[Carosel43]

I have an MSI GTX760-itx and have a really strange issue. 

 

I recently sold the card and the guy who got it reported doa. sigh. 

 

I tested it before i dropped it off to him so he has busted something but i cant work out what. 

 

The card powers up, fans spin, no output. Boot into windows with onboard graphics and nothing in device manager. I have tried 2 UEFI intel sandybridge era boards (including my original test board) and no joy. 

As a punt, i slapped it into an old core 2 duo board with a non uefi bios and it booted it right away. Into windows no problems, drivers, fine, benchmarks, yep runs them although performance is down. 

 

GPUZ tells me the card reports it is capable of pcie x16 1.1 but its only running at x1 1.1. I then put another gtx 760 i have lying around on the same system and it reported the same x16 1.1 capability but was actually running at the same. Performance on this card was as it should be. 

 

I updated the bios on the disobedient card, no joy. 

 

So, what could be causing the card to only run at pcie gen 1.1 at 1x speed even under load and only work on an ancient core 2 motherboard? I am most perplexed. 

[Levent]

I wouldnt have gotten that card back. Check the PCB for any sort of damage or missing components near PCIE lanes. This sounds like the guy you sold it to fucked it up.

[Carosel43]

I have checked the board as thoroughly as i can. 

 

I found damage on the last pin of the interface on the back side of the card. Its a long story, but the pcix slot on his old board damaged it. I spotted this before i left and basically i have said 'it wasnt damaged when i dropped it off, if you busted it i cant do much'. He seemed to accept this and i took it away to try and fix it. I didnt refund him. 

 

Anyway i looked it up and its a ground pin. Checking with my multimeter it still has continuity when plugged into the board so in theory it should be ok???

 

I cant see any surface mount parts missing but i will have another look