Hi all!
A friend of mine brought me a defective Zotac GTX 960 with a failing power detection.
Even though the 6 pin PCIe power cable is plugged in, the card says "Plugin PCIe power cable and reboot".

Since I have no schematics it is hard to find out the NVVDD_PGOOD trace.

I checked if the Controller (NCP81174) sends a Power good signal and the signal VR_RDY at pin 3 is high. So I assume the controller is not sending a bad signal (?).

As always I appreciate your help!

OK. I found out that I was measuring rubbish. Since NVVDD has nothing to do with the issue I have posted here.

I found a schematic that at least partly is common with my gtx 960.
But I have no idea to start my analysis.

Is LOWPWR_Mode high if that issue occurs? Is it GPIO12_LOW_PERF?

Are there any tutorials out there where I can start to learn what means what on Nvidia cards?
From my IT understandings would a high signal always be "true" = 1. But I am no electrician.

Would be glad if someone could tell me where to start my journey

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Posted after 2 hours 13 minutes 18 seconds:
Can someone tell me the values of R516 and R501? I cant measure their value and there is nothing printed on them (?) ...

thrinrot
Look at here:
viewtopic.php?p=887380#p887380
Use an online translator

Thanks for your advice. Found out that both resistors R516 and R501 were defective.
After changing them to 2.7k Ohm (R501) and 10k Ohm (R516) Resistors, the card is back to live again