Can someone, with Sapphire HD4850, post their max core and mem OC with no hardmod but air cooled? Mine was 760mhz core and 1160mhz memory when i passed Vantage Performance run. Vantage gave graphics driver errors on 770 mhz core speed. I haven't tried out the max memory OC. I have AS1 as a heatsink with 2x120mm@800rpm. Temps dont go over 45C in Vantage.