Articles: Cases/PSU

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Unlike the above-discussed CX600, the GS series models can yield almost all of their total output power via the +12V rail. Like the senior model of the series, the 600W and 700W models comply with the 80 PLUS Bronze requirements.

UPS Compatibility

Working with our APC SmartUPS SC 620, the GS700 and GS600 were stable at loads up to 385 and 366 watts, respectively, when powered by the mains but couldn’t switch to the UPS’s batteries even at 280 watts.

Cross-Load Voltage Stability

The lower-wattage models are better than their 800W cousin in this test, but not by much.

The 600W model keeps its voltages within 2% of the required level in the typical load range but the maximum deflection is anyway no larger than 3%.

The GS700 is even better, always keeping its voltages within 2% of the ideal level. So, both PSUs are exemplary in terms of voltage stability.

Output Voltage Ripple

The GS700 is comparable to its 800W cousin in this test in terms of both high- and low-frequency output voltage ripple. The GS600 has weaker ripple, but the difference isn’t large, so we only show you the diagrams of the 700W model.

Temperature and Noise

The GS600 and GS700 are cooled by the same fans. It is the 140mm Ong Hua HA1425H12B-Z model as is employed in the GS800. The wiring differs due to different highlighting.

As you may have guessed, the top photo shows the GS600’s fan and the bottom photo, the GS700’s fan.

The fan regulation algorithm is the same as in the GS800: the fan turns on for a while at loads above 150 watts but only works constantly at loads about 300 watts. It accelerates linearly right after that, reaching almost 2000 RPM at full load. This is somewhat lower than the top speed of the GS800’s fan, but high anyway. That’s why these PSUs are silent at low loads but very noisy at high ones.

Efficiency and Power Factor

The Corsair GS600 is 85.6%, 88.3% and 84.7% efficient at the reference loads of 20%, 50% and 100%, respectively, meeting the 80 PLUS Bronze requirements by some margin. It showed its peak efficiency of 89% at a load of 256 watts.

The Corsair GS700 is 86%, 88.8% and 86.2% efficient at the reference loads of 20%, 50% and 100%, respectively, thus meeting the 80 PLUS Silver requirements even. Its peak efficiency of 89.2% could be observed at a load of 239 watts.

The power factor was above 99% with both PSUs at full load. This is an excellent result.

Standby Source

The two PSUs were similar in this test. Their standby voltage was always within the norm.


The GS600 and GS700 are affordable PSUs with modern circuit design and high efficiency but very noisy at high loads.

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