Discussion Forums > Technology
Help me diagnose this shit
kitamesume:
still, try swapping out the PSU, even if the PSU is plenty, if the PSU is faulty then thats a problem itself.
i had experiences with this, PC kept crashing even with a 550watt PSU, the unit is barely an i3 without a GPU which should indicate that the PSU is overkill. swapped the PSU and it stopped crashing, apparently the defective PSU had a faulty OCP and trips when theres a sharp rise in current consumption even far before it hits the target limit.
--- Quote from: GoGeTa006 on November 30, 2012, 05:48:37 PM ---although I do hear a high-pitch sound comming from it every now and then. . .
--- End quote ---
this might be an indication of it.
vuzedome:
Probably as soon as the new graphic drivers kick in the GPU starts sucking power out of the PSU and then BAM!!
No facts to back up my claim, just guessing.
kureshii:
With all the above info, it's probably down to mobo and PSU now. Swap out the PSU like kita said, and see if it still happens.
rostheferret:
Someone please point out if I'm talking out my ass, but to the best of my knowledge most PSU's (particularly cheap ones) run on rails. For example a 400W PSU may have two rails capable of handling 200W a piece. If you overload one rail, down goes the system. You'll have multiple leads coming out of the PSU - and since you're running close to the limit it seems - don't plug in all from one lead. A power spike could be all that's needed to cause the crash. Normally you'll want to allow a 20% buffer for optimum efficiency. Means he should be looking at a 600W really, but you're right in that it should still run in theory. Failing that, see if you can't get a PSU from another computer for testing purposes.
kitamesume:
--- Quote from: rostheferret on December 01, 2012, 09:52:22 AM ---Someone please point out if I'm talking out my ass, but to the best of my knowledge most PSU's (particularly cheap ones) run on rails. For example a 400W PSU may have two rails capable of handling 200W a piece. If you overload one rail, down goes the system. You'll have multiple leads coming out of the PSU - and since you're running close to the limit it seems - don't plug in all from one lead. A power spike could be all that's needed to cause the crash. Normally you'll want to allow a 20% buffer for optimum efficiency. Means he should be looking at a 600W really, but you're right in that it should still run in theory. Failing that, see if you can't get a PSU from another computer for testing purposes.
--- End quote ---
theres a flaw in this concept, you shouldn't aim for pure wattage rating, hunt for ampere capacity per rails, aim for 18A(for single-mainstream GPUs) to over 22A(required for high-end GPUs).
i've aimed for 350watt PSUs (seasonic SS-350SFE) with some awesome 12V amperage, at 18A on each of it's two rails(total Amperage mustn't exceed 26A) it can run a 180watt GPU(15Amps) for all it cares without breaking a sweat.
edit: now that i think of it, i wonder which rail is the P4 power is tapped into, or does it have it's own rail... hmmm...
ah and about the power spikes, it rarely happens on a PC, since a PC's power consumption is capped.
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