Corsair Professional Series HX1050 Power Supply Unit Review

In a cold load test we run the PSU in an open air environment to see what the unit is capable without the limiting factor of heat. We hook the PSU up to our load tester and measure the voltage of the various rails as well as measuring the efficiency.

The results were… surprising to say the least. Bad part first; the unit was undervolting at most loads we put it at which was very disappointing for a unit of this calibre. Although it is not undervolting by any amount worth worrying about it is still not good to see that considerably cheaper units such as the NZXT HALE90 has much stronger rails.

The next bit really puzzled me, and after much consideration and in-depth scientific research I have concluded that Corsair fed this unit steroid-enriched electrons which made the efficiency massive while shrinking the voltages. But, in all seriousness, these efficiency readings were baffling. I retook all the tests 3 times to make sure there was no mistake, and what you see is the average of the three almost identical readings. After checking tests from other sites, I must tell you that what the efficiency of this particular unit is not representative of other HX1050s as it is well within the parameters for 80+ Platinum rather than Silver. The efficiency never dropped below 94% which is around 10% higher than equivalent tests from other reviewers. I still don’t know why this particular unit has such a high efficiency but rest assured that I have spent hours ensuring it is nothing to do with our test equipment!