750W PSU for 650W UPS?

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Someone Somewhere
The PSU rating is the maximum power draw of the components running off it - you aren't likely to get near 750W with that. You could go for a good 550W one I expect.

To get the input power of a PSU from output, divide the power usage of the components by the efficiency. E.g. 500W of load at 80% efficiency is 500/0.8=625W. Suggest you get a relatively high efficiency PSU with a good power factor (because UPSs are rated in apparent power (VA), not true power (W)).
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mental2013

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Apr 5, 2013
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Have bought the following:
Intel Core i7-3930K 3.2GHz 6-Core
Asus P9X79 WS SSI CEB LGA2011
Corsair Vengeance 32GB (4 x 8GB) DDR3-1866
Samsung 840 Pro Series 256GB 2.5" SSD
Western Digital Caviar Black 1TB 3.5" 7200RPM
AMD Firepro W7000 Graphics Card

Have yet to buy the following:
PSU, Cabinet, Cooler, and Writer.
Thanks


 
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Someone Somewhere

Someone Somewhere

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Sep 23, 2012
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The PSU rating is the maximum power draw of the components running off it - you aren't likely to get near 750W with that. You could go for a good 550W one I expect.

To get the input power of a PSU from output, divide the power usage of the components by the efficiency. E.g. 500W of load at 80% efficiency is 500/0.8=625W. Suggest you get a relatively high efficiency PSU with a good power factor (because UPSs are rated in apparent power (VA), not true power (W)).
 
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