1000W-1200W Roundup: Five High-End PSUs
by Martin Kaffei on December 9, 2010 1:20 PM ESTCougar GX G1050 Regulation
| +3.3V regulation | |
| Load | Voltage |
| 10% | +3.03% |
| 20% | +2.42% |
| 50% | +1.21% |
| 80% | -0.30% |
| 100% | -0.30% |
| 110% | -1.82% |
| +5V regulation | |
| Load | Voltage |
| 10% | +2.20% |
| 20% | +1.60% |
| 50% | +0.20% |
| 80% | -1.00% |
| 100% | -2.00% |
| 110% | -2.60% |
| +12V regulation | |
| Load | Voltage best/worst |
| 10% | +2.08% / +1.83% |
| 20% | +1.83% / +1.58% |
| 50% | +1.17% / +0.67% |
| 80% | +0.42% / -0.25% |
| 100% | -0.17% / -0.83% |
| 110% | -0.42% / -1.50% |
This power supply is better than the AeroCool V12XT, and not just because of the 80Plus Gold certification. As you can see the voltage drop is lower and all the rails are clearly within specifications. The +3.3V starts high at 10% load but 3% is still not a problem.
Ripple and Noise
| +3.3V ripple quality | |
| Load | Ripple and noise |
| 10% | 9.50mV |
| 20% | 10.40mV |
| 50% | 15.10mV |
| 80% | 25.40mV |
| 100% | 30.10mV |
| 110% | 39.70mV |
| +5V ripple quality | |
| Load | Ripple and noise |
| 10% | 14.90mV |
| 20% | 15.00mV |
| 50% | 28.40mV |
| 80% | 39.70mV |
| 100% | 50.70mV |
| 110% | 55.20mV |
| +12V ripple quality | |
| Load | Ripple and noise |
| 10% | 18.40mV |
| 20% | 28.40mV |
| 50% | 29.20mV |
| 80% | 44.30mV |
| 100% | 58.30mV |
| 110% | 69.50mV |
Cougar has some problems with high ripple on +3.3V and +5V at maximum load, but +12V never reached more than about half of the maximum allowed 120mV. While the results could be better, other brands have more problems here. The most important result is the +12V rail, and it performs well enough.
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JimDDuncan - Tuesday, December 21, 2010 - link
who is your post aimed at sabresberi?mapesdhs - Monday, December 20, 2010 - link
Martin,
Just curious, how do these PSUs compare to existing units which have been out for
a while, eg. the Thermaltake Toughpower 1000W Modular? Any thoughts?
Ian.
Martin Kaffei - Monday, December 20, 2010 - link
Hey,apart from the fact that the Thermaltake (CWT 2x 500W Design) is less efficient than most actual PSUs, the voltage quality is almost perfect.
DC-DC, good caps and filtering, not faraway from Corsair HX. A proven design.
Cooling could be better, since many components are close together. However, still uncritical temps.
ghanz - Monday, January 17, 2011 - link
It would be great if Anandtech could do a roundup of a few 550w to 750w PSU units, as most mainstream users are using PSU units within this wattage range.