To be honest i havent seen any big increse of the performarnce with those clocks at 850/1700/2000 and 1.063.
I dont know if its my idea or not but with 802/1604/1999 and without voltage was better. I will try more tests and will decide,but its pity i cant go higher because of the $@#$ reference gtx570 and the crap VRMS
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