Our load tests utilize a couple of FAST ATE active load testers and a variety of other equipment such as an oscilloscope, power conditioner, temperature probe and a power consumption meter. You can read more about our standard testing approach here.
The tests performed are based around six conceivable setups that are out there and progressively load down the PSU up to the power supply's limits or 1000W, whichever comes first. Since our test equipment's limits are higher than that of the Rosewill SilentNight 500W power supply, we can test it to the maximum.
The above tests represent typical loads that we have measured from various systems and are meant to give a rough idea of where your computer might fall in line with our tests. Please keep in mind that each system is different and actual loads can vary greatly even with similar hardware.
Let's start by taking a look at the voltages to see how well this unit did during testing. Starting with the 12V rail, we see 2% regulation from start to finish with a total drop of .06V. The 5V rail managed to stay within 2% of specification with a total drop of .06V from start to finish. Moving towards the 3.3V rail, we see that regulation was within 2% of specification with a total voltage drop of .02V.
DC Output quality for the Rosewill SilentNight 500W was great and well within specification. During Test 1, we saw 10mV of noise on our scope. When we increased the loads in Test 2, the ripple climbed to 19mV at a little over half load. During Test 3 under a load of 500W, the oscilloscope showed a maximum of 28mv on noise on the 12V rail.
The Rosewill SilentNight 500W is rated for 80 PLUS Platinum efficiency. This means that the power supply must perform at 90%/92%/89% efficiency at 20%/50%/100% loads respectively. As you can see, the SilentNight 500W passed on our bench, and wasn't close to failing at any point.
The Rosewill SilentNight shined all the way through from start to finish. The unit is built exceptionally well inside and out. It may cost a bit more than most 500W power supplies, but silence often comes with a cost when you want it to perform well and stay reliable. As I said before with the Kingwin unit, the only thing that I don't like about the unit is that it lacks Over Temperature Protection, but with the unit being active in my HTPC for over a year with little to no active cooling on that side of the case, there is no worry here due to how cool the power supply runs.
Performance was spot on as well. Voltage regulation is nice and tight all the way through and DC Output quality is just what you'd expect from such a unit too and stays low. Even the efficiency of the unit is exactly what you'd expect for a unit that is certified as 80 PLUS Platinum certified. Even the five year warranty helps give insight that it is every bit of a quality unit and you'll be covered for years to come in the rare even that something happens to it.
Had Rosewill been on the ball with bringing the Super Flower power supply to market under their name much sooner, I'd happily award it with the same Best Features Award the Kingwin Stryker 500W was given over a year ago. Unfortunately, changing the sticker on the unit and putting it on the shelf a year later just isn't going to give it that same level of recognition to those who did it first.
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