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Does PSU affect CPU overclockability? - Page 2

post #11 of 15
Thread Starter 
Quote:
Originally Posted by Phaedrus2129;12273544 
"Gold" certification has little to do with a power supply's quality and suitability for overclocking. 80PLUS just certifies a power supply's efficiency, which was already explained earlier.

And there comes a point where even getting a higher quality power supply won't make a difference with overclocking because it's your motherboard or the CPU itself that is the bottleneck, not the PSU. The TX750 is below that point, but close to it.

Thank you for that explanation, reps are given
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post #12 of 15
Thread Starter 
Quote:
Originally Posted by Phaedrus2129 View Post
An 850W power supply will run any dual GPU setup and most tri-GPU setups. 750W would run anything but overclocked SLI 480s. A 650W will run any reasonable dual-GPU gaming system. A 550W will run any single GPU gaming system (including an OC'd i7 and a GTX480/580) and many dual GPU setups. A quality 400-450W will run 99% of single GPU setups including your sig rig.
im upgrading to crossfire 5870 and plan on ocing this as well. what do you feel about this and a 750w tx corsair
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post #13 of 15
750W should run your rig just fine, even with another 5870.
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post #14 of 15
Agreed, 750w is perfect for dual 5870s. Efficiency is a secondary consideration, the primary one for clockers is getting clean, stable power. Ripple under good control and stable voltages lets you push those clocks more easily without having to push up the voltages for your chips too high. A gold rated unit will save you money over lower rated units, but it won't help you overclock any more.
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post #15 of 15
Thread Starter 
Quote:
Originally Posted by allikat View Post
Agreed, 750w is perfect for dual 5870s. Efficiency is a secondary consideration, the primary one for clockers is getting clean, stable power. Ripple under good control and stable voltages lets you push those clocks more easily without having to push up the voltages for your chips too high. A gold rated unit will save you money over lower rated units, but it won't help you overclock any more.
whats the best psu for clean stable power without ripple?
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Raptor Raid 0 Sony Optiarc dvd and blu ray win 7 x64 Hanns G 28" 
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ocz zx series 850w gold corsair 700D w/ window panel logitech g9x 
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