When it comes to testing a power supply, there are two courses to travel. One takes you down a path using a device to stress out the PSU and provide data regarding the power levels across all three rails. The second, and the one I make use of, utilizes an actual test system to give a more real-world account of what the power supply is capable of. While both methods have their merits, I prefer to use an actual computer to more closely resemble the manner of use that you, the potential customer, will put the product through.
That said, let's take a quick look at the test system. At the request of readers, I have beefed up the system to put a more realistic strain on the power supply.
Gigabyte 965P-DS4 motherboard (Supplied by Gigabyte)
Intel Core 2 Duo E6600 processor
2x 1024MB Corsair XMS2-8500-C5 memory (Supplied by Corsair)
GeCube X1900XTX graphics (Supplied by GeCube)
Sapphire X1900XT graphics (Supplied by Sapphire)
Western Digital 250GB SATA hard drive
2x Western Digital 160GB SATA hard drives
Western Digital 80GB hard drive
Sony 52x CD-ROM optical drive
Samsung 16x DVD-R optical drive
2x 120mm fans
4x 80mm fans
While this isn't a Quad-GPU setup, we are certainly in the realm of having a system that is going to put a significant power drain on any power supply. Testing will consist of checking the power levels across all three rails at idle and again while the system is under stress. This should give us a good look at the capabilities of the power supply being tested.
I have become accustomed to newer power supplies providing a very stable level of available power, but this Cooler Master Real Power Pro 1000 manages to take it to the next level. While we expect to see a slight dip in voltage across the rails when the system is under load, we also expect to see a bit of fluctuation while under that same load. This model managed to keep those slight fluctuations to no more than 1/100 of a volt! This means that no matter how hard you thrash this power supply, you can expect nothing but a near perfect flow of power to all of your components.
As noted above in the graph, this near perfect level of power also comes in a very workable voltage level. All three primary rails manage to keep their rated power levels under idle and load conditions without so much as a hiccup. Additionally, the power supply was incredibly quiet during load testing. Even when the fan kicks up under load, the noise levels are far less than other models I have tested recently. This will be a very welcome feature for those looking to create a near silent PC.
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