1000W-1200W Roundup: Five High-End PSUs
by Martin Kaffei on December 9, 2010 1:20 PM ESTOCZ Z1000M Regulation
| +3.3V regulation | |
| Load | Voltage |
| 10% | +2.73% |
| 20% | +2.12% |
| 50% | +1.21% |
| 80% | -0.61% |
| 100% | -1.82% |
| 110% | -2.42% |
| +5V regulation | |
| Load | Voltage |
| 10% | +2.40% |
| 20% | +2.40% |
| 50% | +1.40% |
| 80% | +0.40% |
| 100% | -0.40% |
| 110% | -0.80% |
| +12V regulation | |
| Load | Voltage |
| 10% | +1.83% |
| 20% | +1.75% |
| 50% | +1.42% |
| 80% | +0.92% |
| 100% | +0.33% |
| 110% | +0.08% |
The +12V rail is very stable and always above 12.00V. Only the +3.3V could use better regulation, as it shows a voltage drop of more than 5.15% during our test from 10% to 110% load. +5V starts sonewhat high and ends 0.80% under the optimal value.
Ripple and Noise
| +3.3V ripple quality | |
| Load | Ripple and noise |
| 10% | 14.80mV |
| 20% | 18.40mV |
| 50% | 20.90mV |
| 80% | 28.50mV |
| 100% | 33.20mV |
| 110% | 35.30mV |
| +5V ripple quality | |
| Load | Ripple and noise |
| 10% | 20.90mV |
| 20% | 23.50mV |
| 50% | 27.90mV |
| 80% | 34.40mV |
| 100% | 42.60mV |
| 110% | 46.80mV |
| +12V ripple quality | |
| Load | Ripple and noise |
| 10% | 46.80mV |
| 20% | 57.30mV |
| 50% | 74.80mV |
| 80% | 90.30mV |
| 100% | 101.60mV |
| 110% | 118.30mV |
OCZ has some small transients on +3.3V, while +12V shows a high ripple, but they are all still within specifications. While technically satisfactory, the results certainly aren't great for a very expensive PSU. 118mV on +12V and 47mV on +5V are both very close to the 120mV and/or 50mV limit.
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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.