The specifications coincide with those of the original CWT DSAII 600W model and are not really up to today’s requirements. The PSU can only deliver 80% of its full output power via the most important +12V rail whereas the load capacity of the other rails is as high as 150 watts, which is hardly necessary for a modern PC.
The Corsair CMPSU-600CX V2 is certified to comply with the basic 80 PLUS standard.
Working together with our APC SmartUPS SC 620, the Corsair CMPSU-600CX V2 was stable at loads up to 362 watts when powered by the mains but couldn’t switch to the UPS’s batteries even at 280 watts.
Cross-Load Voltage Stability
The voltages are stable enough for a PSU without dedicated regulation. They only go out of the permissible range at greatly misbalanced loads, i.e. when there’s high load on the +3.3V and +5V rails and low load on the +12V rail or vice versa.
Output Voltage Ripple
The high-frequency output voltage ripple isn’t weak, yet doesn’t go out of the permissible range except for short spikes on the +3.3V and +5V rails.
We see the same picture at the double mains frequency.
Temperature and Noise
The Corsair CMPSU-600CX V2 is cooled by a 7-blade 120mm Yate Loon D12SH-12 fan which runs on a sleeve bearing and has a rated speed of 2200 RPM.
The fan starts up at 950 RPM and maintains this speed until 50% load. Then it accelerates in a linear manner, reaching 2000 RPM at full load.
Thus, the Corsair CMPSU-600CX V2 is rather quiet at low and medium loads, but louder than most of its competitors at high loads.
Efficiency and Power Factor
The Corsair CMPSU-600CX V2 is 86.1%, 86.9% and 82.3% efficient at the reference loads of 20%, 50% and 100%, respectively. It sports its peak efficiency of 87.5% at a load of 274 watts.
Overall, this model meets the 80 PLUS Bronze requirements but without any reserve at full load.
The power factor is above 98% at most loads, peaking at over 99%, which is a good result for a PSU with active power factor correction.
The standby source works blamelessly.
The Corsair CMPSU-600CX V2 is not very efficient, not very quiet and not very cheap. Its full duplicate (in electrical parameters) from CWT is about 20% cheaper (the CWT version has a simpler exterior design but its 140mm fan promises better acoustic parameters). There are many other worthy competitors in the same price category.