After overvolt my graphic card by error my system...

Question

I got a X1900GT Rev 2 with volt regulator in card, when I overload the pci express to 1.6 volt from 1.5, at startup my system show character in magenta and blue at the memory test and can´t play any game rebooting continuosly. May I repair any resistance or condesador or diode or nothing to do?