The configuration utility supplied on the catalyst control center, ramped mine up to 662mhz core and 945mhz mem.
Just wanted to know what you lovely folks out there have managed to push yours up to. Mine hits 89C :/
PS. On a side note, in Serious Sam 2 after the glendale demo, a core 41mhz faster and mem of 45mhz fast, only seems to give me 4% more of > 60FPS (scoring being > 60fps 96% and 30-60fps 4%. Before the gfx OC it was >60fps 92% and 30-60fps 8%) Ingame settings are everything on max/optimal 1600x1200, AA = medium HDR= off as it seems to lag you after cut scenes.
How lame, I thought.