ATX voltage fluctuation spec

[dredd2929]

I have a PC Power and Cooling 510 SLI in my system. I read the results of Tom's Hardware's PSU recent stress test of this unit, and he reported that it stayed within tolerance on all rails. That's all well and good, but the author states that the ATX spec allows for 120mV fluctuatin on the 12V rail. Using my ASUS PC Proe utility, I'm seeing the +12V rail fluctuate from 11.84V to 11.776V; the latter voltage is a drop of 224mV. Is this something I should be worried about? I'm thinking this may be because the motherboard probe is reading the voltage at a different point, perhaps some minute resistance between the PSU and the "virtual voltmenter" is giving rise to the increased voltage drop?

J. J.

 

[imported_Kensai]

Wrong forum. The ATX spec allows 5% fluctuation.

 

[Peter]

... and 10% on 12V.

 

[Bassyhead]

Verify that with an actual meter. Your 12V supply is well within 5% and of course the 10% that Peter noted.