PC Power & Cooling Silencer 760W PSU - Testing the 760W Silencer

Article Index
PC Power & Cooling Silencer 760W PSU
Closer Look, Features and Specs
Cables and Test Setup
Inside the Silencer 760W
Testing the 760W Silencer

Testing - 5W, 412W & 776W: 

We initially plugged the PSU into an EZ PSU Tester 3 in order to power it on for our "idle" measurements.  As noticed below, the voltage rails were fairly stable with no load, but these aren't necessarily indicative of overall load performance.  According to our Kill-a-Watt, the power draw was 5W.  We thought these results would be interesting to include and compare with other power supplies to see how they manage a non-load situation, and how much power the PSU itself will draw.

12v Ripple & Noise
12v Ripple & Noise
5v Ripple & Noise
5v Ripple & Noise
   
3.3v Ripple & Noise
3.3v Ripple & Noise
-12v Ripple & Noise
-12v Ripple & Noise

 

This is the first PC Power & Cooling PSU that I've looked at and I honestly didn't know what to expect.  This PSU is not really cheap when compared to the Cooler Master Silent Pro Gold 1000W unit - so hopefully we are getting a little more quality with this unit.  As a result, I expected it to be rock stable at least.  As you can see by clicking the images above, we captured a minuscule 6mV ripple & noise measurement on the 3.3v rail, up to 20mV on the 5v rail and 50mv on the +12v line.  This is nice and clean power as ATX specifications state 50mv is allowable on the 3.3v and 5.0v rails while 120mv is acceptable on the 12v rails.  Even with a really heavy load the Silencer 760W PSU stayed well within specifications on the rails.  In fact, other than the -12v rail - the rest of the system stayed under half of the maximum allowable ripple.  This is excellent.  The -12v line was the "noisiest" at 76mV noise when under a 776W load.  That being said, we were really pushing this PSU as we've done a little tweaking to PSU Test Platform and will update that article in the near future. 

Average Ripple

Average Voltage

 

 

Other than the darn -12v rail, the voltage is very solid on the Silencer 760W PSU and while ATX specifications allow an incredible 1.2v fluctuation on the 12v lines - we measured the -12v line at -13.3v under load - coming in at 1.3v off of the specification but there was absolutely no variation on the +12v line.  The 5v and 3.3v lines were almost as solid.  Even though we are allowed a 0.5v variance on the 5v line - we saw a mere 0.01v change.  The 3.3v line is allowed to fluctuate just over 0.3v, but it stayed sock solid with a small 0.02v dip at full load.  This is an excellent showing for the most part by PC Power & Cooling. 

Conclusion:

PC Power & Cooling has been around for quite a while and they certainly are no stranger to the Power Supply arena.  They have proved this by their longevity and by continuing to put out products that are affordable, high quality and built to last.  The 760W Silencer is one of their products that shows they can perform well - even with a smaller fan.  The PSU was pretty quiet throughout testing and was audible only after extended use at over 770W.  During this process, the main voltage lines were very stable, emitted very low electrical noise and showed that the Silencer is a high-quality unit.  My only concern is how much the -12v rail dropped under load.  In fact, when we dial in a load that is just above its rated continuous output, the line strays beyond specification requirements for ATX power supplies.  I don't believe this will cause damage in your system, but it still falls outside the realm of allowance.

If this was the +12v rail, I'd fail the PSU immediately and state that it was a waste of money.  That being said, I can't help but feel let down than the rock-solid rails didn't translate over to the -12v side and this issue causes it to lose a few points here for sure.  Also, keep in mind that we are 0.1v outside of specification - when I'm putting 16W more load that it's rated for.   Still, I believe it should have enough "oomph" to deal with this "overload".

Pros:

  • Low electrical noise
  • Rated conservatively when analyzing specifications 
  • Lots of connects and SLI certified
  • +12v rail is ROCK SOLID and never budges
  • 3.3v and 5v rails are the cleanest we've seen

 

Cons:

  • 80mm fan makes noise under heavy load
  • -12v rail voltage drops a lot under load
  • Non-modular design means cable management is more challenging

 

BCCRating

I'd like to that OCZ Technology for sending over this Power Supply for us to review.  If you have any questions or comments, please post them in the forum at the "Comments" link below.