Exclusive: Antec Signature 850W
by Christoph Katzer on May 7, 2008 2:00 AM EST- Posted in
- Cases/Cooling/PSUs
DC Output Stability and Quality
Seeing the stability of the rails like this is somewhat less than expected of a truly stable performance. All rails stay within specs and are therefore fine, but we have seen better results on competing PSUs. Even though the 12V rails don't have as much voltage drop and stay within the 3% regulation, the drop is still quite large. Both smaller rails have a regulation limit of 5%, which is again quite large, and we can see both rails heading towards the lower end of the allowed area of the ATX norm.
As for the ripple measurements, we see quite a bit of fluctuation but everything stays well within specs. At lower loads we see up to 12mV on the 12V rails and it reaches up to 26mV with higher loads. The lower voltage rails deliver really nice and clean voltage with only up to 8mV ripple.
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JarredWalton - Wednesday, May 7, 2008 - link
I have used dozens of Antec cases over the years... I have not yet purchased an Antec PSU separate from a case, however. Then again, Earthwatts might make that a reasonable thing to do these days.strikeback03 - Wednesday, May 7, 2008 - link
I've used EarthWatts 380 units in a couple of systems for the lab. Seem to do fine, nice and quiet, and prices around $20-30 after rebate at Newegg, works for me.DDG - Wednesday, May 7, 2008 - link
I recently picked up the Earthwatts 650 unit and I must say I'm impressed so far. It's quiet and has 6 SATA and Molex connectors as well as 2 PCI-Express (1 6-pin and 1 6+2 pin). It replaced a Truepower 550-watt PSU that was 5 years old but still going strong (just too noisy and not energy efficient).