Well I have had my AIW 9600 Pro up to 375 / 355, but I never leave it there more than to benchmark. My old 9600PRO used to do 526 / 346 on stock cooling with no volt mods. I would say that you could probably get a bit more out of your ram, but every card is different. Just play with it and see where you get. If it gets too hot, you will probably get artifacts, in which case, drop teh speed a bit and test again.