i recently bought an MSI geforce 7900 GTO graphics card from ocuk, installed it and it runs no better than my last card, ( a geforce 6610xl). i phoned ocuk and they advised me to upgrade my psu, which i did. from a generic 350w to a hiper 530w psu. i didnt make any real difference. next they advised me to format my hard drive and re-install windows, which i did. again, no difference. so i sent the card back, they tested it and sent it back to me saying it was ok. has anyone got any ideas what could be wrong. thanks in advance for your help.
p4 550 3.4ghz
1 gb ram