I've now got one card running happily at 850mhz, and one at 887mhz - ie. about 670gh/s and 690gh/s
VinceSamios Nice work, what temps are you running?
Best I can do with my card so far is 625gh/s @ 850mhz running 73c using .84v.
It was tested at 689gh/s @800mhz and .88v according to the masking tape that was on it...