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PerfCap Reason

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May 30, 2013
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#1
So im currently in the process of overclocking my GTX 660 TI, and while monitoring gpuz and running unigine heaven to benchmark the PerfCap Reason section said "Vrel", "VOp", and also at times "Pwr" but the only one that worries me is Pwr, because i noticed that the power consumption was around 97-99% TDP as well, is my power supply not enough, or is that saying i need to increase the voltage supplied to my card?