So I did the mod on my 8800GTS 512. I also did 2 modifications on my motherboard (added tantalum caps in parallel and a vdroop mod) After installing everything I turn it on to find just a black screen (I also didnt hear any post beep) I thought it was OVP so I broke out my multimeter, GPU was at 1.4v and mem could not go below 2.35v no matter how much I turned the trimmer (I know the trimmer wasent at its limit, it wasent clicking) So I unsoldered the vmem mod and the mem then measured 2.1v. Still a black screen, So I unsoldered the vdroop mod, still a black screen. I didnt unsolder the caps yet (they are on the back of the board and would take a while to get everything out of my case) I know for sure that the polarity is correct on the caps, so polarity isnt the problem.

What could it be? I will be testing another GPU(unmodded) this weekend to see if its the board or the GPU. Also one other thing that may be helpful is that during the voltmod I ripped the + trace off of the pcb (the one for the vgpu mod, right below the primarion chip) but I saw that the trace led directly to the resistor right below it so I just soldered it to that. Is that ok or could that be causing the problem?

Thanks for reading and thanks for any help