GPU help needed

gruiz4919

Prominent
Aug 13, 2017
2
0
510
Hi I am in need of some computer help. I built my PC using used parts I've bought online and for the past 2 months everything was going great until today .

I pressed the power button and for a split second I saw my cpu , gpu , and exhaust fan flicker for a second and then turn off, I kept pressing the power button and nothing happened.

I took everything apart and used a different power supply and the sake problem kept occurring . I eventually was able to boot up my PC , but the catch is , I unplugged my gpu and used the onboard graphics .

I later tried to plug in my gpu but not the 6 pin power connector and the fan spun so I turned it off, plugged in the 6 pin power connector , and the same thing happened again , fans flickered , but no boot up at all. PC works completely fine but without the power connector plugged in.

I need help !
 


CPU is an AMD Phenom X4 940
GPU Sapphire AMD Radeon HD 7770
4GB DDR2 400MHz RAM
450 watt Thermaltake PSU