יש כל מיני תוכנות לכרטיסי מסך שיש בהם אפשרות לשים אחוזים לpower target-

מה זה אומר בדיוק?

Because GPU Boost was designed to balance clock rate and voltage with thermal design power in mind, though, overclocking is really made most effective by adjusting the board’s power target upward as well. EVGA’s Precision X tweaking tool includes built-in sliders for both the power target and the GPU clock offset.

Although GeForce GTX 680’s TDP is 195 W, Nvidia says the card’s typical board power is closer to 170 W. So, increasing the power slider actually moves this number higher. At +32%, Precision X’s highest setting is designed to get you right up to the 225 W limit of what two six-pin power connectors and a PCI Express slot are specified to deliver.

http://www.tomshardware.com/reviews/geforce-gtx-680-review-benchmark,3161-4.html

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