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2 small vs. 1 large PSU - Page 2

post #11 of 18
480's
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Main system
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post #12 of 18
Thread Starter 
Quote:
Originally Posted by Draggin View Post
480's
want to expand on that thought?
Edited by hoth17 - 12/19/10 at 2:12pm
post #13 of 18
Quote:
Originally Posted by hoth17 View Post
, want to expand on that thought?
He was responding to me being stupid and not reading. lol
Edited by Live_free - 12/19/10 at 2:23pm
post #14 of 18
Thread Starter 
Got it, lol

I missed your original post.
post #15 of 18
Watercooling actually reduces the amount of power your computer consumes, especially for graphics cards. Cooler transistors use less power.

With your rig, you are going to be saving 100W+ of power by going to water cooling.
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Labor of Love
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post #16 of 18
Cooler transistors don't take less power... True, higher heat means more resistance, but it's a small factor, not 20%+. Maybe 2%. And that's more than compensated by the overclocking that watercooling entails.
post #17 of 18
Quote:
Originally Posted by Phaedrus2129 View Post
Cooler transistors don't take less power... True, higher heat means more resistance, but it's a small factor, not 20%+. Maybe 2%. And that's more than compensated by the overclocking that watercooling entails.
Wrong. I've actually tested this one myself! I hooked up a digital volt & current meter to my computer, and then hooked that up to the EPS12V cable. I then took readings every 100ms for an hour (while running LinX) and averaged the amount.

i5 750 @ Stock:

Air Cooling (85c average core temp) : 71.7w
Water Cooling (40c average core temp): 65.1w

That's a 10% drop!

Predicted by:

R = kT (roughly)

85c --> 40c is a 14% drop in Kelvins.

With the i5 750 @ 3.8 GHz the power difference was 12W. (105 vs. 93)

I have tested with other CPUs and at other clock speeds and the results are similar. With high power GPUs consuming 200W+ a piece you are going to be saving 25W+ per GPU.

Thus:

10W per CPU = 20W
25w per GPU = 75w

Total: 95W+, depending on overclocks.

GPUs I assume would be similar, and due to their increased power draw,
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Labor of Love
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post #18 of 18
As a rule, one PSU will cause you much less problems than multiple PSUs, among other advantages.
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