Core i7-980X: Dialing In Efficiency With The Right Overclock

Overclocking With Minimum Voltage Increase

Multiplier 30x, 4.0 GHz (Turbo Boost 31x, 32x at: 4.13, 4.26 GHz)

Multiplier 31x (Turbo Boost 32x, 33x at 4.26, 4.4 GHz)

The same happens to the fastest reliable setting we obtained with just a moderate voltage increase. We started off with a 250mV offset, but were able to reduce to just 73mV. Even then, power efficiency decreased significantly because of power consumption growing much faster than performance.