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Cooler Master GX 750W Power Supply

By: Kenneth Graff II | Other PSUs in Cases, Cooling & PSU | Posted: Aug 6, 2010 7:12 am
TweakTown Rating: 88%Manufacturer: Cooler Master

Test Results

Our load tests leverage a couple of FAST ATE active load testers and a variety of other equipment such as a hotbox, oscilloscope, power conditioner, temperature probe and a power consumption meter. You can read more about our standard testing approach here.

The six tests being performed are based around five concievable setups that are out there:-

- Test 1 is based around a standard gaming system that would place a load of about 20%.
- Test 2 is delving into an entry-level SLI setup, pulling about 50%.
- Test 3 starts going into an enthusiast's SLI or Crossfire setup, drawing a 65% load.
- Test 4 is for an SLi/Crossfire setup with high-end cards incl. 3-way arrangements pulling 100%.
- Test 5 takes the configuration for test four, but adds overclocking.
- Test 6 utilizes the maximum capacity of the testing equipment or the PSU; whichever is higher.

The test equipment pulls a max of 1000 Watts during these tests.






This unit does a fantastic job reaching the certified efficiency levels up until it really gets pushed. It sticks around in the mid-eighties up until test five, where it drops to 79% through test six; which is ok, I suppose, given your usage.


When something is stressed, it will lose its efficiency. Think "hot rod at the drag strip". It isn't exactly going to sip fuel while ripping down the lane. Despite having said that, it is a bit disappointing having discovered the dwindling efficiency during heavy use.


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