Problem with bfg 8800gt oc

[drover_brad]

I got a bfg 8800gt oc in a hp m9040n pc i have the latest drivers and 630watt psu, my monitor keeps shutting off during gaming. the temperature doesn't go above 75c, also i under-clocked it and it ran kinda good but when it is at factory setting it shuts off could this be a voltage problem or a card error. if there is software to help me determine this can somebody send me a link. any help would be good.

 

[RazberyBandit]

Try completely disabling the monitor shutdown time within your Power Options in Control Panel. Set it to "Never." You may also want to set the power mode to "High Performance."

 

[drover_brad]

did not work it seems as though when i turn the core clock up it shuts down is there anyway to test the card, also if some one could help me set it up manually