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 equal to that of the Cooler Master Silent Pro Platinum 1000W 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 3% regulation from start to finish with a total drop of .07V. The 5V rail managed to stay within 1% of specification with a total drop of .07V from start to finish. Moving towards the 3.3V rail, we see that regulation was within 1% of specification with a total voltage drop of .06V.
DC Output quality for the Silent Pro Platinum 1000W was okay, but well within specification. During Test 1, we saw 25mV of noise on our scope. When we increased the loads in Test 3, the ripple climbed to 59mV at a little over half load. During Test 6 under a load of 1000W, the oscilloscope showed a maximum of 79mv on noise on the 12V rail.
The Cooler Master Silent Pro Platinum 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 Silent Pro Platinum passed on our bench, and wasn't close to failing at any point.
I was expecting quite a bit out of this power supply from the start. The previous CM units that we have seen here at TweakTown have all been excellent power supplies all the way around. I had some very strong hopes when I pulled the unit out of the box. As soon as I opened up the enclosure to see the inside, I knew exactly what was going to happen and my hopes went out the window.
Looking at the performance of the Silent Pro Platinum 1000W, you can see exactly why my hopes went out the window. Voltage regulation just wasn't what we would expect from Cooler Master. The 12V rail just barely eked into the 3% range while both the 5V and 3.3V rails stayed within 1% of specifications. The DC output quality was exactly where we expected things to go wrong and was quite subpar compared to what we are used to seeing from Cooler Master. We saw 79mV of noise on the 12V rail and feel this just isn't acceptable from them, especially since we know they can do much better. At least the efficiency was great, more so than what we expected. Normally we see efficiency drop off a bit sharper as loads increase, but this wasn't the case.
Adding to the woes of the DC output quality for the Silent Pro Platinum 1000W is the relatively high price for the unit at $249.99. This makes it one of the most expensive 80 PLUS Platinum rated power supplies on the market and by quite a bit. Take into consideration that we have looked at a majority of these units and all have provided equal to or better performance to the Silent Pro Platinum 1000W, it looks even worse.
Don't let all of this dissuade you too much though; it is far from a bad unit. The inclusion of the two dedicated fan ports is a nice addition to the unit and something I would like to see a lot more units have. Many units already feature thermal management that keeps the fan running on the power supply for about 30 seconds more than the rest of the computer to cool the unit and remove excess heat from the case. Add this to the integrated 7V fan controller and you've got a mass adopted way to promote removal of residual heat within a case.