1000W-1200W Roundup: Five High-End PSUs
by Martin Kaffei on December 9, 2010 1:20 PM ESTOCZ Z1000M Noise
| Sound Pressure Level | |
| Load | dB(A) |
| 10% | 18 |
| 20% | 18 |
| 50% | 20 |
| 80% | 22 |
| 100% | 25 |
| 110% | 29 |
The OCZ isn't very noisy at low loads, and 29dBA at 110% overload is decent for a 1000W PSU. From 0-80% load, this PSU is nearly silent. It may not be the most silent PSU we have ever seen, but we have seen (and will see again) louder offerings, including several in this roundup.
Efficiency and PFC
| 230VAC, 50Hz | ||
| Load | Efficiency | PFC |
| 10% | 84% | 0.804 |
| 20% | 89% | 0.852 |
| 50% | 91% | 0.915 |
| 80% | 91% | 0.943 |
| 100% | 89% | 0.954 |
| 110% | 88% | 0.960 |
| 115VAC, 60Hz | ||
| Load | Efficiency | PFC |
| 10% | 83% | 0.938 |
| 20% | 88% | 0.943 |
| 50% | 90% | 0.980 |
| 80% | 89% | 0.986 |
| 100% | 87% | 0.991 |
| 110% | 86% | 0.993 |
OCZ barely squeaks by and meets the 80Plus Gold requirement (87% on 115VAC, or 88% on 230VAC), but it's not quite at the same 90%+ range as some of the other PSUs. The results at 10% load are also good if not great. Interesting to note is that our measurements are slightly lower than the 80Plus organization's results.
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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.