PSU power consumption question

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PSU power consumption question

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Author	Thread : PSU power consumption question

nick111

Profile: member

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12-21-2007 at 09:15:58 AM

I'm building my computer with much thought on power consumption. I will not be overclocking and have the E6750 CPU, P5k-E mobo, 2 gigs of ram,1 DVD writer, 2 hard drives. I have an Antec NeoHe 500 watt available to use and has plenty of amperage. Now I know I can get away with a smaller psu. Will the 500 watt be too wastefull? How much more electricity will the 500 watt consume versus a smaller psu, say a 400 watt? Or does it not matter since the only consumption is what the components are drawing? Thanks

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cfvh600

Profile: old hand

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12-21-2007 at 10:53:13 AM

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The consumption will be limited to what the components are drawing.

jsc

Overclocking since 1978: 1.77 MHz Z80 to 2.01 MHz.
Profile: old hand

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12-21-2007 at 12:08:53 PM

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Plus PSU losses.

All other factors being equal, a 500 watt PSU operating at 80% load will be more efficient than a 400 watt PSU operating at 100% load. Losses will show up as heat, so the more efficient PSU will run cooler.

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