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#31
i read most of this he is using a 650 w psu i dont think it is the driver i think it is the configuration in the bios
if you have onboard crossfire and a main gpu the main gpu should overide mine did i didn't have to adjust onboard hd4200 I fiddled with it yes but made no difference in turning it on or off so i left it on no bottle necks
could be your mobo is having issues with the pci e slot faulty card would cause damage to the slot and cause card malfuntion try using another card and see if it persist if so then i suggest taking a good look at the mobo where it could be your issue no game is that intenese to cause a hd 5770 to lag new or old this card is not a bottom feeder either so i would suggest looking deeper and as suggested
PSU might be at fault if not supplying enough voltage it can be 650 700 or what ever but if it is going bad and not supplying proper power your system will have up and down performance
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