1000W-1200W Roundup: Five High-End PSUs
by Martin Kaffei on December 9, 2010 1:20 PM ESTAntec HCP-1200 Regulation
| +3.3V regulation | |
| Load | Voltage |
| 10% | +0.91% |
| 20% | +0.00% |
| 50% | -0.91% |
| 80% | -1.52% |
| 100% | -2.72% |
| 110% | -3.64% |
| +5V regulation | |
| Load | Voltage |
| 10% | +0.00% |
| 20% | -0.20% |
| 50% | -0.60% |
| 80% | -1.20% |
| 100% | -1.60% |
| 110% | -2.00% |
| +12V regulation | |
| Load | best/worst |
| 10% | +1.42% / +1.08% |
| 20% | +1.50% / +1.25% |
| 50% | +1.50% / +1.00% |
| 80% | +1.00% / +0.58% |
| 100% | +0.58% / +0.25% |
| 110% | +0.33% / +0.00% |
Wow! No, seriously, check out the 12V regulation. It starts just over 1% high and at 110% overload it still delivers the ideal voltage. +5V starts at the ideal and drops just 2%, which is also good. The 3.3V rail shows a more significant drop, but it's not as critical on modern systems and it's still within spec.
Ripple and Noise
| +3.3V ripple quality | |
| Load | Ripple and noise |
| 10% | 8.80mV |
| 20% | 9.20mV |
| 50% | 11.50mV |
| 80% | 16.30mV |
| 100% | 19.70mV |
| 110% | 18.70mV |
| +5V ripple quality | |
| Load | Ripple and noise |
| 10% | 13.20mV |
| 20% | 15.10mV |
| 50% | 23.70mV |
| 80% | 29.20mV |
| 100% | 31.50mV |
| 110% | 35.50mV |
| +12V ripple quality | |
| Load | Ripple and noise |
| 10% | 9.90mV |
| 20% | 9.90mV |
| 50% | 13.30mV |
| 80% | 18.20mV |
| 100% | 19.70mV |
| 110% | 19.90mV |
+5V shows some undershoots, which is why we see the higher results on that rail. The other rails have hardly any ripple or noise. Particularly impressive is the +12V result, with ripple always below 20mV. The oscilliscope showed very clean results with no transients.
Facebook
Twitter
RSS
44 Comments
View All Comments
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.