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Corsair CX750M 750W 80 PLUS Bronze Power Supply Review

By: Zac O'Vadka | 80 PLUS Bronze PSUs in Cases, Cooling & PSU | Posted: May 6, 2015 8:05 pm
TweakTown Rating: 90%Manufacturer: Corsair

Test Results


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 higher than that of the Corsair CX750M 750W power supply, we can test it to 1000W.




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 2% regulation from start to finish, with a total drop of .18V. The 5V rail managed to stay within 2% of specification, with a total drop of .13V from start to finish. Moving towards the 3.3V rail, we see that regulation was within 2% of specification, with a total voltage drop of .09V.


DC Output quality for the Corsair CX750M 750W was excellent, and well within specifications. During Test One, we saw 10mV of noise on our scope at 30% load. When we increased the loads in Test Three, the ripple climbed to a mere 19mV at around 75% load. Increasing loads even further showed that the noise on the 12V rail climbed to 26mV at 750W.


The Corsair CX750M 750W is rated for 80 PLUS Bronze efficiency. This means that the power supply must perform at 82% / 85% / 82% efficiency, at 20% / 50% / 100% loads respectively. As you can see, the Corsair CX750M 750W is performing exactly as it should.



Final Thoughts


Time and time again we've seen quality power supply units from Corsair. There is little to be said about their units that we haven't said already. They have proven their worth and are a frequent choice for custom builds that I do on a regular basis.


The Corsair CX750M is no exception to this and is another quality unit from Corsair. Looking at the regulation of the unit, all rails are within 2% of specification. DC output quality was good with a maximum of 26mV at max load. These may not be the results that we are used to seeing from their enthusiast grade units that cost three times as much as this unit, but that is to be expect.


This is a value unit and it performs as such. Anything more and it would be competing with middle of the road units and any less would mean that it wouldn't have some of the protections and modular cables. Corsair has packed just the right features for just the right price in the CX750M and it is highly recommended for those on a budget.

Product Summary Breakdown

TweakTown award
Quality including Design and Build85%
General Features90%
Bundle and Packaging90%
Value for Money95%
Overall TweakTown Rating90%

The Bottom Line: Corsair's CX750M PSU comes in under $100 and gives you modular connections along with 750W of stable, quality power. What more can you ask out of a budget unit?

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