No signal mouse & keyboard have no power etc. Fans on gpu on

Hello. So I was just playing some games when my screen went all in green stripes and after rebooting monitor would say "no signal" mouse and keyboard have no power etc. Fans on gpu are spinning, cpu cooler works temperature display on front panel works etc. I tried the 30s pushing power button trick but that didn't help. I removed GPU and it posts on integrated graphics so I reset the CMOS still nothing. Tried different PCIe. Nothing. My GPU is working cause I tested it on another computer. What else could be wrong?