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Who to trust, seasonic or DMM?

post #1 of 13
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So I recently got a really sweet deal on a LNIB Seasonic X650. This is supposed to be one of the best 650 units, all gold rated and junk.

Hooked it up in my new system (sig rig), hooked it up to the provided 16AWG cable, etc. The only thing I have running off molex power are the case fans with 3-pin to molex connectors, (3 140mms and 1 120mm) all chained together, so not sure if that'll be causing any weirdness.

Anyway, I took out the trusty DMM to check the 12 and 5V rails on the molex, just to get some information. The 5V read out @ 5.10V, but the 12V is reading out @ 12.37V. Is this cause for worry? I know that it's only 3.1% off, but still, I was expecting such a quality unit to be pegged closer to spec.
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post #2 of 13
RMA it. Any X650 should be within 1% of the rated spec. My PSU never goes below 11.88 on idle and never goes lower than 11.9 on load or higher than exactly 12V.
    
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post #3 of 13
well the x650 did hit 12.28 on the jonnyguru review
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post #4 of 13
The voltages being a few percent above spec are not a problem. The change in voltage from low to high load is more of a concern.
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post #5 of 13
Also, that is an unrealistically low load, and it's still well in spec anyway.

As mentioned above, voltages around 12.25V or so seem to be normal for the unit at low loads:
http://www.silentpcreview.com/article986-page4.html
http://www.jonnyguru.com/modules.php...tory2&reid=169
post #6 of 13
A low load voltage of 12.37v isn't anything to worry about. As long as it doesn't droop a lot under full load, there isn't a problem.

Quote:
Originally Posted by Lostintyme View Post
RMA it. Any X650 should be within 1% of the rated spec. My PSU never goes below 11.88 on idle and never goes lower than 11.9 on load or higher than exactly 12V.
Not all of them are created equal?
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post #7 of 13
Totally normal bro..
+ or - even up to about 5 % is within normal ranges.
Also you must keep in mind the power the PSU is ( from the wall ) taking in varies as well. Sometimes by as much at 10 volts.
post #8 of 13
Software voltage readings are usually inaccurate. If you're really concerned, use a quality multimeter. If it's out of ATX spec (or another spec that Seasonic advertises as being compliant with) you can RMA it, but otherwise I don't think they'll see anything wrong with it, and send you the old one back.
    
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post #9 of 13
Quote:
Originally Posted by angrysasquatch View Post
Software voltage readings are usually inaccurate. If you're really concerned, use a quality multimeter. If it's out of ATX spec (or another spec that Seasonic advertises as being compliant with) you can RMA it, but otherwise I don't think they'll see anything wrong with it, and send you the old one back.
He is using a DMM.
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post #10 of 13
Quote:
Originally Posted by Lostintyme View Post
RMA it. Any X650 should be within 1% of the rated spec. My PSU never goes below 11.88 on idle and never goes lower than 11.9 on load or higher than exactly 12V.
Since when is 1% the number? It's always been within 5% of the spec, which it is. There's no need to RMA it.
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