When beep codes no longer make sense

[Irivaka]

First of all, thanks for reading.

I'll get straight to the point - I placed a new GPU in my build, it worked at first. Then I moved my pc and suddenly I had lost video output from both my GPU as onboard connectors. I tried my pc without the GPU and still no image. What could be wrong? I've tried breadboarding with these results:
Only cpu + hsf -> 1 long and 2 short beeps which would indicate there is a video issue... but I get the same code when using another cpu in another mobo of the same model
When I install any RAM sticks, the speaker doesn't even beep at all which is weird because it should still complain about the video issue (at least that's what I think)

 

[alexoiu]

What board using? ASUS?

 

[McVitas]

I would try different power supply.

 

[Irivaka]

I would try different power supply.

The power supply I have is a 80+ Bronze 600W. That should be plenty for a system with 1 gpu.
I've found the solution to my problem. I cleared CLR and CMOS and did a fresh boot without GPU. Then I installed DDU to uninstall all existing graphics drivers and set up my pc for safe mode boot. Then I installed my GPU the way you should, and there it was! A glorious gaming pc was born