pc wont overclock anymore

[DesertWolf01]

ever since i installed my 5770 i cant overclock anymore.
when i go into bios and overclock and everything then save it and exit my computer shuts off, and when i try to turn it back on it powers up but dont display anything on screen. only way to fix this is to take gpu out then put it back in and it works but i cant overclock my cpu this happens everytime. but it used to work i had my q6600 at 3.2ghz for awhile.

 

[patonb]

What power supply?

 

[DesertWolf01]

its a ATX 500w model number psps-500

 

[patonb]

Sparkle eh.... 25A on the 1 12V.... Thats a good possibility there.

What gpu did you have?

 

[GhOsT1321]

I believe that the 5770 needs ~40Amps on the 12 volt rail. You most likely need a quality power supply. A Corsair should do the job.

 

[patonb]

No...... 40Amp is a Big psu...... AMD says:

■450 Watt or greater power supply with one 75W 6-pin PCI Express® power connectors recommended (600 Watt and two 6-pin connectors for ATI CrossFireX™ technology in dual mode)

Your psu is round about a 375-420W psu in actuallity

 

[Peter.Cort]

the 5770 takes about 10 amps under load. I'd get a new psu.