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The EXTREME Overclocking Forums are a place for people to learn how to overclock and tweak their PC's components like the CPU, memory (RAM), or video card in order to gain the maximum performance out of their system. There are lots of discussions about new processors, graphics cards, cooling products, power supplies, cases, and so much more!
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10-22-2004, 04:42 PM
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#1 | ||||
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Leon
Senior Member
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What To Believe?
I have a generic 'come with case' 400W PSU, and according to my motherboard the average voltages in idle are 3.3 - 3.28 5 - 4.95 12 - 11.92 but upon testing with a multimeter, with resolution of 10mV, 0.5% accuracy (@ 20V DC Reading), using the aux connector (3.3 and 5V rails) and standard molex (12V) i got 3.3 - 3.39 5 - 5.12 12 - 12.16 now these all seem very healthy, and i dont get random restarts or bsod's.. but i would have thought that with my rig, this psu would be struggling, which is why i nabbed up a Antec TruePower 550W PSU.. using this calculator http://www.jscustompcs.com/power_supply/ , im on approx 270W, and it would appear that even 400W generic could handle it, but according to the MB, it cant.. im getting the TP 550 regardless (i plan a massive oc soon hopefully.. probs get that lovely 230x11 @1.6vcore boot again), but still, just wondering who ich to believe 
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10-22-2004, 04:44 PM
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#2 | ||||
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Old Fart OverClocker
Senior Member
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Believe the multimeter!
Believe the multimeter!
  EDIT: The ATX spec is +/- 5% is you are fine either way.
Last edited by davidhammock200 : 10-22-2004 at 04:58 PM. |
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10-22-2004, 04:50 PM
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#3 | ||||
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Leon
Senior Member
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hmm, is it significant that the psu is always blowing out hot air, and under prime load, very hot air
im aware that most generic psu's get their power rating while being tested externally in a lab which is maintained at like 20C, so in real life, most rated at 400W probs bearly deliver 300W if im to believe the m,ultimeter, this thing is doing better than most leading brand psu's.. under p95 max power test, all rails are still great.. slightly over volting, yet the mb voltages seem to reflect whats really happening, and all of them drop a bit |
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