Hi ! I am using nVidia xfx geforce 8400se ! I know it is not a good gpu for gaming but i can increase my gpu performance using riva tuner ! So overclocking my gpu is one of my important job ! After installing the latest nVidia driver ( 197.45 ) i can't over clock my gpu using riva tuner ! now what ? I must need a overclock utility that support latest nvidia drivers ! can anyone help ? Without overclocking my gpu, i can't play race driver grid well :dead:! SO please help !