1000W-1200W Roundup: Five High-End PSUs
by Martin Kaffei on December 9, 2010 1:20 PM ESTCooler Master Silent Pro Gold 1200W Noise
| Sound Pressure Level | |
| Load | dB(A) |
| 10% | 22 |
| 20% | 22 |
| 50% | 24 |
| 80% | 30 |
| 100% | 37 |
| 110% | 45 |
"Silent" Pro? That may be the most unsuitable name for a PSU like this. At high load the Cooler Master is as loud as the old PC Power and Cooling Turbo Cool 1000W. Even at low load Cooler Master is no match for the other PSUs in this roundup. 30 dBA at 80% load is far too much for a "silent" PSU; they really need a new brand name for their higher wattage PSUs. It's no secret that such power supplies need more cooling than smaller units, and no one expects silence from a 1200W PSU.
Efficiency and PFC
| 230VAC, 50Hz | ||
| Load | Efficiency | PFC |
| 10% | 83% | 0.840 |
| 20% | 90% | 0.877 |
| 50% | 91% | 0.930 |
| 80% | 91% | 0.952 |
| 100% | 89% | 0.958 |
| 110% | 89% | 0.962 |
| 115VAC, 60Hz | ||
| Load | Efficiency | PFC |
| 10% | 82% | 0.941 |
| 20% | 88% | 0.949 |
| 50% | 90% | 0.976 |
| 80% | 88% | 0.983 |
| 100% | 87% | 0.985 |
| 110% | 86% | 0.986 |
While the other results are somewhat disappointing, Cooler Master shows a high efficieny at 230VAC. Starting from 20% the efficiency is above 89%. As usual, 115VAC is slightly lower, particularly from 80% to 110% load. The results at 10% are also decent, coming in above 80% in both our tests.
To answer our question from the last page, then, the Silent Pro Gold 1200W does end up with better results than the Cougar GX, at least in the efficiency department. Let's see how our final PSU compares before coming to a conclusion.
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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.