+3.3V and +5V amperage vs. overclocking?

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Tiago_3

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Jul 10, 2016
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So, I came to these forums just a couple of weeks ago asking whether I should upgrade my old 550W Seventeam Power Supply to a new one for my system (the topic can be read here: http://www.tomshardware.com/answers/id-3117056/psu-good-keeping-ocing-system.html). I then took the advice I got from here and bought a new Seasonic S12II 620W power supply and installed it in my system yesterday. I only just found out, however, that the amperage/electric current for both the +3.3V and +5V rails are lower in this new PSU than it was in the older one I had, as can be seen in the images below:

https://postimg.org/image/dke7cinep/

https://postimg.org/image/oql0dm3dj/

I'm a little bit upset by this, as I don't know whether it could negatively affect my performance in any way. Ever since installing this new PSU, I haven't been able to get the same clocks on my CPU as I was before (system crashes a lot more). Could this be related?

Thanks.
 
Solution
J
https://en.wikipedia.org/wiki/ATX

Supply (V)

Tolerance

Range, min. to max. (V)

Ripple, p. to p., max. (mV)

+5 ±5% (±0.25 V) +4.75 V to +5.25 50
−5 ±10% (±0.50 V) −4.50 V to −5.50 50
+12 ±5% (±0.60 V) +11.40 V to +12.60 120
−12 ±10% (±1.20 V) −10.80 V to −13.20 120
+3.3 ±5% (±0.165 V) +3.135 V to +3.465 50
+5 standby ±5% (±0.25 V) +4.75 V to +5.25 50
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DSzymborski

DSzymborski

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Nov 19, 2010
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The Seasonic is a million times better than your junk PSU. You *want* your PSU to have relatively weaker +3.3v and +5v rails because component power use has changed over the last 15 years. The +12v is what's driving the high-power parts. Your concern about the differences on the minor rails doesn't really have a factual basis.

If your system is crashing more, than there's something else going on.
 
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Zerk2012

Zerk2012

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Oct 6, 2014
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You made a very good choice getting the Sesonic PSU the 3.3 and 5 volt rails are a nonfactor.
If your PC is crashing then you have problems.
When you changed processors did you reset CMOS if not then do it. Anytime you change them reset the CMOS then the PC recognizes the new part.
 
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T

Tiago_3

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Jul 10, 2016
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Ok thanks, I'm new to the whole power supply market (and even more so mounting them inside my case) so that was very clarifying. Also, should I worry about the fact that after I installed my new PSU I had to make a pretty tight seal on the back of the case so that all the cables could go through the back and stay there? That was the best choice for cable management and the way my old PSU was also installed (with the cables going through the back holes and not the front) but I really had to exert some force on the back cover so that I could close my case with the cables there.

My real question is then, would this pressure exerted from the back cover to the cables damage them in the long term? I paid an expensive amount for this PSU so wouldn't want that at all..
 
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Tiago_3

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How does this answer my question? I don't get it..
 
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junkeymonkey

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Nov 11, 2013
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''I only just found out, however, that the amperage/electric current for both the +3.3V and +5V rails are lower in this new PSU than it was in the older one I had, as can be seen in the images below:


as long as there inline with that I posted above ??? not hard to understand that's listed as ATX PSU specs if your falling below them tolerances your unit is bad in my book and my not properly supply correct required power to your system and affect anything from performance on down to shutdowns / crashes

good luck
 
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