is 1100mhz enough to play top games on full details ? my card is rather far from decent (asic 58%) and when i set 1150 i must bump core voltage arround 1,22v-1,23v (1,18v reading in gpu-z) meanwhile on 1100mhz is running on 1,16v (1,11 reading in gpu-z). In both case temps are ok (below 70c...