Question PC doesn't boot with GPU connected, shorted?

[Doctor_SciFi]

I got a used 3060 12gb and have the following issue. The PC will boot up fine, even with the GPU installed in the pcie slot, but when I connect the 6+2 pin connector the PC will not power on at all. I thought it might be my PSU which is an EVGA Supernova 450 watt, but I did a continuity test on the 8-pin and the highlighted pins all pull to ground, is my card cooked?

https://imgur.com/a/Xd9lfIq

Specs:
MoBo: Aorus B450 i PRO WiFi
Cpu: Ryzen 5 2600
Gpu: Nvidia 3060 12Gb
Psu: EVGA SuperNova 450w SFX
RAM: 2x8 G.Skill 3600MHz

 

[helpstar]

update the bios to the latest version your cpu still supports
is the 6+2 PCIe cable the original delivered from your PSU or are you using an adapter or third party cable?

 

[Ralston18]

Google "gpu 6 + 2 pinouts diagram"

Then map your test results to the applicable diagram(s).

Were only the cables that came wth the GPU used. Or perhaps the cables that came with the PSU.

 

[Doctor_SciFi]

update the bios to the latest version your cpu still supports
is the 6+2 PCIe cable the original delivered from your PSU or are you using an adapter or third party cable?

I'm using the power cable from my PSU. I also probed the 8 pin while it was on and the two uncolored pins on my picture pull 3 and -3v to ground, not sure if one of those should be pulling 12 or not.