So let me get this straight...your 3.3V rail is ''fluctuating'' from 3.360V-to-3.376V? A difference of 0.016V or 0.476%?
AND, your 12V rail is ''fluctuating'' from 12.000V-to-12.096V? A difference of 0.096V or 0.800%?
Your ''software monitoring'' is probably reading the A/D conversion resolution error for each rail, so the ''fluctuation'' is more-than-likely
HALF OF THAT!! As DSzymborski indicated in an earlier post, software monitoring is not always reliable, and the ATX Specification on PSUs is +/-5%, or 10X what you are seeing in ''fluctuation''!
Since you only gave us the
MODEL and not the
MODEL/SERIES NUMBER, please use the following to ''look up'' your PSU :
http://www.realhardtechx.com/index_archivos/Page1354.htm
By extrapolation, I surmise that your PSU is the 2013 released Pure Power L8 Bronze BQ L8-600W built by HEC. TechPowerUP!, ''The European Edition'' of Tom's Hardware, did a review of the 500W model on July 4, 2013 here :
Be Quiet! recently revamped their Pure Power line with several new additions. They released six new non-modular units, and we will test the new 500W unit today. It promises a high price/performance ratio along with ultra-quiet and reliable operation.
www.techpowerup.com
As you can see from the graphs on page 4, it is normal for the rails to start out at higher voltages at light load, drift down to the mean voltages at 50% load (250W), and end up slightly less at 100% load (500W).
See Also :
be quiet! may not be a name we know all that well here in America when it comes to power supplies, but in the European market they have really made a name for themselves and are planning to do the same here in the states. Not that long ago we took a look at the <a...
thinkcomputers.org
In conclusion, on your specific PSU, the 12V rail is 12.096V, the 5V rail is 5.000V and the 3.3V is 3.360V? Let me assure you, if you are getting
LESS THAN 1/2% DRIFT IN LOAD REGULATION ON THE RAILS from this Bronze PSU...
REJOICE!! Can
ANYONE predict when your PSU will fail with those readings? No more than we could predict when Jesus will walk the earth, again!! ;-D If you had
CrAzY DrIfTiNg of the rails, or they were outside ATX SPEC? Yes, it would be done!! This is a 6-month-old, Bronze, budget PSU with good reviews and a 3-year manufacturers warranty, so in this case...
RELAX!!
Your intermittent POSTing failure is more-than-likely somewhere else. If, however, you feel the need to ''test'' this PSU further, buy an ''LCD PSU Tester'' that actually displays 12V1, 12V2, -12V, 5V, 3.3V, 5VSB and PG, or remove the PSU from your system, take it back to where you purchased it and have them check the PG signal timing.