From Nvidia's specification, which has a 980MHz core and 1502MHz (6008MHz DDR) memory clock, we were able to push the GTX 660 to 1113MHz and 1602MHz (6408MHz DDR) -- a 14% core clock increase and 8% higher than Gigabyte's factory overclock.
When testing Deus Ex: Human Revolution, our overclock allowed for 11% more performance than a standard GTX 660 and 7% more than Gigabyte's overclocked GTX 660.
Our overclock yeilded 9% more performance in Crysis 2 at 1920x1200, a 6% increase over Gigabyte's factory overclock.
In Max Payne 3, our custom clock settings produced 15% more performance than Nvidia's default specification and 8% more than Gigabyte's overclock.
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