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Help me diagnose this shit
Ixarku:
--- Quote from: GoGeTa006 on November 30, 2012, 05:48:37 PM ---he should need 485W and he has a 530W PSU
--- End quote ---
Honestly, when I saw this, it had me wondering if the PSU was getting overloaded even though the load was less than the rated maximum, though I didn't think the PSU was actually the problem. So when building a machine, what's the tolerance that one should allow for on PSUs? 20% below the stated maximum? Or does it depend on the quality of the PSU in question?
rostheferret:
--- Quote from: Ixarku on December 01, 2012, 11:57:52 PM ---
--- Quote from: GoGeTa006 on November 30, 2012, 05:48:37 PM ---he should need 485W and he has a 530W PSU
--- End quote ---
Honestly, when I saw this, it had me wondering if the PSU was getting overloaded even though the load was less than the rated maximum, though I didn't think the PSU was actually the problem. So when building a machine, what's the tolerance that one should allow for on PSUs? 20% below the stated maximum? Or does it depend on the quality of the PSU in question?
--- End quote ---
I know that for peak efficiency 20% is a good margin to use. Else it seems to depend on the quality of the PSU. I've seen cheap 1500W ones which I bet suck balls. Just go with a reliable brand. I mean, they aren't expensive, and do you really want to quibble over a few quid when buying the one component capable of frying every other? :P
Ixarku:
Yah, really. If I'm going to spend the money and go to the trouble of building a PC myself, my philosophy is to spend money on quality parts, or don't bother with it at all. I've personally had good experiences with Corsair PSUs, although I'm not as exacting about my system requirements as some people.
buchno:
--- Quote from: rostheferret on December 02, 2012, 01:15:40 AM ---I know that for peak efficiency 20% is a good margin to use. Else it seems to depend on the quality of the PSU. I've seen cheap 1500W ones which I bet suck balls. Just go with a reliable brand. I mean, they aren't expensive, and do you really want to quibble over a few quid when buying the one component capable of frying every other? :P
--- End quote ---
I just added together 4 FX-8350 and 4 Geforce 690 in the PSU calculator, and they didn't reach 1500W.
Who needs such a PSU...?
kitamesume:
--- Quote from: Ixarku on December 02, 2012, 01:27:14 AM ---Yah, really. If I'm going to spend the money and go to the trouble of building a PC myself, my philosophy is to spend money on quality parts, or don't bother with it at all. I've personally had good experiences with Corsair PSUs, although I'm not as exacting about my system requirements as some people.
--- End quote ---
not really, you have to compute by amperes not wattage, ignoring the 5v and 3.3v loads(they're too tiny to be of concern), you'll need to compute all the total wattage of components then divide it by 12v(this is to include all the loses induced since you're factoring in the efficiency with this setting), once you get your final amperage you'll need to distribute them to rails, load balancing as well.
you don't need to add much margin on top of the peak conditions, even on stress tests you barely see them go out of spec on their power consumptions right? at most only powerbugs can induce a rather disturbing power draw.
but in my opinion adding about 3-5A of margin just in case it wouldn't hurt to add some more fans and harddrives.
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