HELLO, I have the HIS Radeon HD6670 DDR3 Graphics card, on my WINDOWS 7 x64 computer..but while playing games E.g crysis3 , farcry3 , NFS rivals any games my screen started flickering CONTINOUSLY.. like monitor display goes on off..I have also checked to adjust refresh rate and reinstalling the graphics. and also i hv install latest gpu driver also the prob will be same...plzzz hlp me whats the problem