msi 760 Throttling to 500 mhz under load

cameron1274

Reputable
Mar 21, 2015
19
0
4,510
this is my card: http://www.vgastore.com/2004365/msi-n760-2gd5-oc-geforce-gtx-760-2gb-256-bit-gddr5-pci-express-3-0-sli-support-video-card


It use to run about 1000mhz but now it only runs at 535mhz when under load.
Could it be my cpu be bottle-necking it? it use to run fine when I got the card.

My specs:
Amd phenom ii x4 965
Coolermaster v6
ASUS M5A78L-M LX PLUS
2x4gb corsair xms3
sound blaster z
and a crapy psu a ultra 600w power supply
 


its max temp after a hard session is about 50c so i dont think its a heat problem

 
None only updated my drivers after I noticed the issue and that did not help I even downgraded to a older driver I know use to work.
I'm starting to think that my power supply is giving out and not giving my card enough power to run at full power