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PC Power Supply Discussion Troubleshooting and discussion of computer power supplies

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Old 12-04-2017
StormShadow StormShadow is offline
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Default Best way to test PSU without equipment?

Suffice to say I don't have an oscilloscope. Anyway, I bought an EVGA 650 G3, was beautiful, actually made my computer snappier I'm pretty sure. Then it died a couple weeks later. They sent me another. PC is not snappy like b4 and has had some weird crashes. Also the PCI-E cable with 2x 6+2 connectors only has one working connector.. they're sending me another cable but I have an icky feeling about this PSU, when the last one died, it borked my mobo a bit, thankfully it's a fairly tough one and has seemingly recovered now (i hope..) but don't wanna chance it again. Any help would be greatly appreciated, Thank You.

P.S. yes I know I should have listened to you and went with the rm550x, but advertising burrows in the braaaaain...
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Old 12-04-2017
Æther Tech Æther Tech is offline
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Why? The G3 is a perfectly fine unit....what does the rmx series have over the g3?

So you got a lemon, it happens. The question is...how did it die? why did it die? And if so, could it have taken other components with it? OR did the PSU dying cause some corruption with the actual data on your drives that is being slowly corrected by windows over time?
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Old 12-06-2017
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Quote:
what does the rmx series have over the g3
Quieter operation probably.
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Old 12-06-2017
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Quote:
Originally Posted by rafal_iB_PL View Post
Quieter operation probably.
People keep saying that.

I sit next to a G3 for several hours a day - still can't hear it when my other fans are running - they aren't high speed loud fans either.

How much louder is the G3 over the rmx? 1db? 5db? 20db? 0.1db?
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Old 12-07-2017
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All of that, depends on how, where and with which equipment you measure it.
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Old 12-07-2017
rafal_iB_PL rafal_iB_PL is offline
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Quote:
People keep saying that.

I sit next to a G3 for several hours a day - still can't hear it when my other fans are running - they aren't high speed loud fans either.

How much louder is the G3 over the rmx? 1db? 5db? 20db? 0.1db?
Some people live in quieter ambient conditions and have higher requirements though.

There are no one-size-fits-all answers for what is satisfactory noise output.
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Old 12-07-2017
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TO my knowledge a PSU will not affect a computer's performance at all. Sure it's not all iny our head?

The CPU has a clock rate. It does its cycles no matter what PSU it's attached to.

Same with the GPU.

Same with everything.

They don't check with the PSU first to see, what it likes, it does what it's supposed to and tells it what to do. Basically, the PSU is a slave to the computer, not the other way around.
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Old 12-12-2017
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Well, the PSU output quality does affect overclocking, which can affect the computer's performance.
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Old 02-14-2018
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Came back after a long time hunting for the "quietest PSU" as my trust old one was making quite a racket. I'm pretty happy not hearing the G3!

Both the G3 and RMx are semi-fanless, so noise level should only happen with load, at which point all your other fans are spinning faster and more loudly.

It's said that when the G3 fans kick in, it's louder than when the fan is running normally with "ECO" mode off at the same load. I don't know, never tested - I don't like the idea of fanless. Call me old-fashioned but I don't even run let my GPU fans auto when there's load, as it's semi-fanless also. This is why I like the G3, the option to have the fan engaged at all times is exactly what I want - and with a 10-year warranty on it.

As far as the fan being always on, I'm quite happy. Nothing to hear, gotta check with my hand lol. I think the loudest thing in my rig is the single secondary HDD, and it's a WD black, tho it is usually in constant use.
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Old 02-14-2018
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Quote:
Originally Posted by turkey3_scratch View Post
TO my knowledge a PSU will not affect a computer's performance at all. Sure it's not all iny our head?

The CPU has a clock rate. It does its cycles no matter what PSU it's attached to.

Same with the GPU.

Same with everything.

They don't check with the PSU first to see, what it likes, it does what it's supposed to and tells it what to do. Basically, the PSU is a slave to the computer, not the other way around.
I can't be certain, but - and this would be the place to confirm - there's something in the back of my mind that says that system power fluctuations can cause erroneous calculations, which are discarded and considered wasted compute cycles, and this is normal. If that is true then it would stand to reason that the better the parts of the power system, the lower the wasted cycles on errors, and the better the performance - or something along those lines..

I just did a quick look on the net and see nothing.. I dunno, I still feel like it's relevant. Could it be in my head? For sure, who knows what rattling around in there lol.
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