If you live in the artic or anartic circles and have a very cool environment or otherwise regularly keep your PC in ambient temps below 10 C (50 F) you'll have room to increase your voltage and to a smaller extent you'll have better stability and can thus reduce your voltage but the downward limit change is smaller than the upward limit change in cold ambient temps. The odds are stacked against you that there is any headroom on a 7750 that isn't easily controlled by PowerTune. Yes for other cards that can be more common, but the 7750 is a 7770 that has already been power limited. Flemeister wrote:Many cards come with stock voltages higher than necessary.
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