PC Power & Cooling Silencer 500W
by Christoph Katzer on June 9, 2008 2:00 AM EST- Posted in
- Cases/Cooling/PSUs
Efficiency
We are using a smaller version of our efficiency comparison graphic to improve chart readability. It is only for 600W or less power supplies and provides more detail in the lower power ranges. With 230VAC input, the Silencer 500W starts at 77% efficiency loaded with 50W. A 100W load improves efficiency to a much better result of 84%, and we reach maximum efficiency of 86% at medium load. Efficiency then slowly decreases to 81% with 550W load. As always, efficiency is lower with 120VAC and especially with 90VAC, reaching 84% and 82% maximum respectively.
Power Factor Correction
The power factor correction on the other hand is as always better with lower input voltages. While the .99 with 230VAC appears low compared to the 120VAC and 90VAC results, it is still a good result - though it is only attained with maximum load.
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xeizo - Monday, June 9, 2008 - link
I´m also positive to the importance of reporting ripple figures, the standard is max.50mV ripple but lately there is a lot of psus sold happily stating 150mV ripple in their specs even though it´s out of the standard.If such companies voluntarily reports 150mV one can only guess how high the real figures are. Or how many more companies out there are a little bit smarter and state 50mV ripple even though the real figures are mabe ~200mV.
High ripple can damage many parts in the computer, lowers performance and rises temperature. So, yes, it's pretty important and should be mentioned in all psu reviews. Not mentioning it is no guarantee that the performance is really great.
HOOfan 1 - Monday, June 9, 2008 - link
50mV is the max specification on the 3.3V and 5V rails. The max spec on the 12V rails is 120mV.