CoolerMaster GX750 -750W PSU
Posted on: 18.05.2010 01:00:00

(Pictured - my rig and - on top - my WC kit being leak-tested... the Antec 300 on top (with WC gear in) will eventually be spray-painted, and modded... but, back to the review)

Installing the CoolerMaster GX750w was quite simple - especially considering its small size! The number of cables did cause a little trouble, but not as much as expected - they easily tucked away into the bottom of my case.

The noise from this PSU was pretty good for such a powerful model - however it wasn't "silent", but what can you expect for around 80? This PSU would be inaudible if coupled with a normal system - however with my fans spinning at around 800rpm, it was ever so slightly noticeable (I'm a noise geek).

Anyway, onto the testing itself - The power supply was tested by taking voltage readings from the connectors as listed below, at both idle and load. To ensure the PSU was put under pressure during load, I ran ORTHOS, ATITools 3D mode and an AVG anti-virus scan coupling this with adding my new water-cooling loop (which is currently being leak-tested) and the fact that I racked up my overclock for load readings (from stock to 3.75Ghz). This ensured load on the main components (CPU, GPU, HDD) during testing. Readings were taken using a digital multimeter.

A dead solid performance from the GX750W - barely budging under load. The biggest difference being 0.01v! This is crazily small variation! This is tiny, and definately within the limits of the 3% "enthusiast" target. I'm particularly surprised as the such little variation on the 12v readings - especially considering the extra power being supplied during load.

I'd only expect this from the very top end of PSUs - ones within the 150+ price range - very well done CoolerMaster. Why the Multimeter is not the highest quality way of testing PSU's, using proper ones that record the data and give min, avg and max helps, also using a couple at once is the closest we can get at the moment. Hence it being called a preview.

Next Page - Conclusion

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