Corsair CMPSU-620HX 620W PSU

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For testing the Corsair CMPSU-620HX PSU, we opted to build up a system based on the power hungry Pentium 4 560 which runs at 3.6GHz and we chose to overclock the system to 4GHz. From there, ATI's current 512MB flagship Radeon X1900 XTX graphics card was used in conjunction with a BFG physics card based upon Ageia's own PPU. Rounding out the system, we have 2GB of Corsair DDR2 memory and a 500GB SATA drive from Western Digital. In an effort to stress test the system, we looped 3DMark06 while concurrently running SiSoft Sandra's 2005 burn-in tests.

HotHardware Test System
Intel Pentium 4 560 3.6GHz running at 4GHz

Processor -

Motherboard -

Video Card -

Memory -

Audio -

Physics Processor -

Hard Drive -


Hardware Used:
Intel Pentium 4 560 3.6GHz running at 4GHz

Intel D975X Reference Motherboard
Intel 975 chipset

ASUS Radeon X1900XTX 512MB

2048MB Corsair XMS2 6400 DDR2 RAM

Creative Labs X-Fi XtremeMusic

BFG Ageia Physics PPU

Western Digital WD5000KS
500GB - 7,200RPM - SATA 3Gb/s


We let the test system run idle for 30 minutes and then recorded the voltages. Then we stressed the PSU and recorded the voltages about 30 minutes into the stress testing. You can see the resulting voltages below. Also recall that this PSU was used in a test machine for over two weeks, during which time we experienced no stability problems.

Test Results
Great Memory, But What About PSU's?

620W Corsair CMPSU-HX620

Idle & Load Voltages


+12V +5V +3.3V









Even though our test system was overclocked and loaded with power hungry components, we failed to make the new Corsair power supply even break a sweat. Even under full load, the highest variance in voltage we witnessed was only 0.02V. Even minus this tiny amount, the overall voltage remained well above the required amount and illustrated that the Corsair PSU had amplepower at its disposal. Overall, we could not be happier with the results from this unit as stable voltage and ample headroom are two keystones to a stable system and a successful overclock.

It should be noted that throughout testing, the unit never managed to introduce any significant noise to the system. Combining a very well-ventilated design with an ADDA fan which is specifically designed to output the hgihest CFM with a minimal amount of noise, the Corsair PSU would be well suited to nearly any application including a home media server as the noise output is minimal.

Tags:  PSU, Corsair, CM, air, rsa, AI

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