1000W-1200W Roundup: Five High-End PSUs
by Martin Kaffei on December 9, 2010 1:20 PM ESTCougar GX G1050 Noise
| Sound Pressure Level | |
| Load | dB(A) |
| 10% | 18 |
| 20% | 18 |
| 50% | 19 |
| 80% | 23 |
| 100% | 30 |
| 110% | 36 |
The Cougar is as silent as the OCZ at low loads, but it's louder at 100% and 110%. However, the GX series is still quieter than older designs with common Young Lin fans. It is nice to see less than 20dBA beneath 50% load.
Efficiency and PFC
| 230VAC, 50Hz | ||
| Load | Efficiency | PFC |
| 10% | 75% | 0.886 |
| 20% | 90% | 0.934 |
| 50% | 91% | 0.974 |
| 80% | 90% | 0.985 |
| 100% | 88% | 0.988 |
| 110% | 87% | 0.995 |
| 115VAC, 60Hz | ||
| Load | Efficiency | PFC |
| 10% | 73% | 0.979 |
| 20% | 88% | 0.978 |
| 50% | 90% | 0.993 |
| 80% | 88% | 0.995 |
| 100% | 86% | 0.996 |
| 110% | 84% | 0.996 |
With 89.79 % Cougar doesn't quite reach 80Plus Gold - unless you round up. Overall it does okay, and PFC is very high with both input voltages. The only real point of criticism is the low efficiency at 10% load (about 105W load); we'd recommend running high-end setups that idle at around 200W or more to get optimal efficiency from this PSU.
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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.