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  #1  
Old 09-15-2009, 12:40 PM
Foobster Foobster is offline
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Default Low voltage from HX520W?

Hi!

I have a HX520W PSU. When I look at the voltages reported in BIOS I get the following:

(approximate min and max recorded during observation)

Vcore 1,35 to 1,38
3,3V 3,3
+5V 4,3 to 4,4
+12V 11,6 to 11,8
-12V -10,4 to -10,5
Battery 3
+5V SB 4,9 to 5,0

What I would like to know is whether these values are acceptable and according to specs?

I found an answer to a similar question regarding the +12V rail on another PSU, claiming that a deviation by 5% is ok. Does this percentage apply to all PSUs and rails?

Some of my voltages are outside of the 5%-interval. Is there a problem with my PSU?


Kind regards,
Foobster
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  #2  
Old 09-15-2009, 10:28 PM
FEAR6655 FEAR6655 is offline
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Test the voltages using a multi meter.
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  #3  
Old 09-15-2009, 11:47 PM
Foobster Foobster is offline
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Thank you for answering.

I will check the voltages manually this weekend.

With my previous PSU (in the same system) I had the correct voltages, when checking in BIOS...

Furthermore, I still need to know what the acceptable deviations are. Any ideas about that? Is there a technical specification I can read somewhere?
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  #4  
Old 09-16-2009, 01:20 AM
FEAR6655 FEAR6655 is offline
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Rails +3.3v, +5v, +5vSB and +12v must all be within 5%.
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  #5  
Old 09-17-2009, 06:32 PM
stevieu stevieu is offline
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Post your finds :)

I am just waiting for a multimeter to arrive, as I'm getting worryingly low software readings from both my TX550 AND TX750. Even more worrying now, as for the first time since this build, the computer randomly lost power and rebooted.

I've just RMAd my GPU, but it could be the power supplies afterall. Major bummer.
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  #6  
Old 09-18-2009, 12:58 PM
Foobster Foobster is offline
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Default PSU tested with multi meter

I followed the instruction on Corsair's site, I.e. unplugged everything shorted the green pin.

I found a key to decode the colors of the ATX-connector, and have obtained these results:

Orange (3,3v) ==> 3,4v OK!
Red (5v) ==> 5,04v OK!
Yellow (12v) ==> 10,02v NOT OK!
Blue (-12v) ==> -9,37v NOT OK!

The results are disappointing. I bought an expensive PSU on purpose, in an attempt to avoid problems like this. I only installed the PSU 7 months ago, so there are a couple of years left on the warranty.

Is there something more I should test before asking for a replacement?
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  #7  
Old 09-19-2009, 06:20 AM
FEAR6655 FEAR6655 is offline
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The -12v is irrelivant now, it isn't used as all components can now create their own negative bias.

Did you test the PSU with a piece of hardware attached? That 12v reading would not even power on a system.
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Old 09-19-2009, 07:50 AM
Foobster Foobster is offline
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Default 12v retested

I connected a fan, an ODD and a HDD.

The voltage reading for yellow (12v) is now 10,01v.

Last edited by Foobster; 09-19-2009 at 07:53 AM.
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  #9  
Old 09-21-2009, 06:36 PM
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RAM GUY RAM GUY is offline
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Let's get it replaced, please use the On Line RMA Request Form and we will be happy to replace it. Be sure to check the box that says “I've already spoken to Technical Support and/or RAM Guy.”
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