1000W-1200W Roundup: Five High-End PSUs
by Martin Kaffei on December 9, 2010 1:20 PM ESTAntec HCP-1200 Noise
| Sound Pressure Level | |
| Load | dB(A) |
| 10% | 18 |
| 20% | 19 |
| 50% | 19 |
| 80% | 24 |
| 100% | 28 |
| 110% | 34 |
Antec is a little bit louder than OCZ at maximum load, but 34dBA is great for an 80mm fan, and it's also very good for a 1200W PSU. The HCP-1200 is virtually silent at anything below 50% load, though it's doubtful the rest of your system will fare as well if you're pulling 600W or more. In this case, Antec delivers better noise than several other competitors despite the use of a higher RPM 80mm fan - a testament to the quality of components and the engineering.
Efficiency and PFC
| 230VAC, 50Hz | ||
| Load | Efficiency | PFC |
| 10% | 86% | 0.885 |
| 20% | 89% | 0.975 |
| 50% | 91% | 0.989 |
| 80% | 91% | 0.989 |
| 100% | 89% | 0.995 |
| 110% | 88% | 0.995 |
| 115VAC, 60Hz | ||
| Load | Efficiency | PFC |
| 10% | 85% | 0.981 |
| 20% | 89% | 0.990 |
| 50% | 90% | 0.999 |
| 80% | 88% | 0.997 |
| 100% | 88% | 0.996 |
| 110% | 87% | 0.996 |
Delivering 85/86% efficiency even at a low 10% load is a great place to start, and it only goes up from there. Nevertheless, we did measure slightly less than ECOS Gold Certification at 50% load; the exact figure was 89.62%, but we rounded up to 90%. That could just be a slight measuring tolerance, but even so Antec could be more efficient. It's still a great PSU overall, but with the cost we wanted to see just a little bit more separation from the competition.
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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.