#1 the card may be low on power
#2 check pcie cable if properly inserted
#3 psu may be insufficient
#4 card must be defective
#5 if you're not doing anything, i mean when its your free time.check the backside of the card and spot if theres a blown out transistor.
#6 call tech support. caution: may irritate you instead of help you.
these are the things that i did when my old 9600gt started acting freaky. luckily it was replaced.
lol thnks but it must have been the card i have replaced it with a 9600GT OC and had no problems