To put these pc power supplies to a test we used the Coolermaster PSU test-lab in Venlo (NL), for more info about the test setup I'll link you to a previous article where we made some in-depth PSU tests using the same equipment. Although we did add one of CoolerMaster's own PC power supplies in this article you must know at all times that we did our tests on our own according to our specs and requirements with little or no help from CoolerMaster supervisor René. Our result are not biased, our goal is to give facts, not to make advertisements.

Apart from using these industrial test devices we also made a real-life test using a self-build high-end pc where we also monitor the temperature & noise levels. More info later, on to our testing candidates ->

Coolermaster SPG700 test results

Using the Chroma electronic load we set the current draw so that we got 20, 50 and 100% load condition. Our results:

Coolermasters unit completely made it through the safety tests:

- Inrush current: 50,7 Ampére

- Power Factor: 0,88~0,95

- Standby power consumption: 1,07 Watt

- 12V shortcut protection: OK

- 5V shortcut protection: OK

Corsair AX750 test results

We repeated these tests for the Corsair AX750 unit:

Safety tests:

- Inrush current: 40,9 Ampére

- Power Factor: 0,89~0,98

- Standby power consumption: 1,00 Watt

- 12V shortcut protection: OK

- 5V shortcut protection: OK

The AX750 also produces some top notch efficiency results. Protection circuitry works like a charm and inrush current remained surprisingly low at only 41 Amps. The standby power consumption (100mA load) is fairly good and so are the peak to peak noise levels found on each volt rail. Ripple is at only 10~15mV during heavy load, compare this with Coolermaster PSU and you know this is a superb score.

Let's put both PSU's head to head now ->