Corsair TX750W Power Supply
by Christoph Katzer on October 30, 2008 3:00 AM EST- Posted in
- Cases/Cooling/PSUs
Efficiency and PFC
As mentioned already, we did not expect to see extremely high efficiency, since previous CWT manufactured power supplies generally top out at 85%. 230VAC reaches that same efficiency, but efficiency with lower input voltages is far worse, particularly in terms of the curve -- the 120VAC and 90VAC inputs both show a precipitous drop after around 400W. Differences between the three curves is rather startling, hitting two different recommendations for ideal loads. With 230VAC, you can easily run this power supply with anything from a 130W to a 700W load, which is a very large range. For 120VAC, the range shrinks to 130W to 500W for best efficiency. If you happen to use 90VAC, you would probably be best served by a different power supply, but you can at least get above 80% with a load of 200W to 500W.
Power factor correction is always much higher with lower input voltages, but people in Europe will have to make do with only .97 at medium load. The PFC results for the TX750W are definitely worse than many of the other power supplies we've tested, particularly with 230VAC.
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JarredWalton - Thursday, October 30, 2008 - link
What, like http://www.anandtech.com/casecoolingpsus/showdoc.a...">our VX450W review? :)spidey81 - Thursday, October 30, 2008 - link
sorry...don't know how I missed that. Thanks for pointing that out! :)Breogan - Thursday, October 30, 2008 - link
The TX line is built both by Seasonic and CWT too: the TX650 is built by Seasonic, while the TX750 is made by CWT.JarredWalton - Thursday, October 30, 2008 - link
That's what we stated with the following, although we didn't explicitly list any models:"Corsair power supplies come from two different ODMs, Seasonic and Channel Well (CWT). Both are very good manufacturers for high-end products, but Seasonic tends to be a more conservative company that doesn't want to grow their business too fast whereas CWT is kind of the opposite and is interested in selling a large number of power supplies through many different companies. Corsair blurs the boundaries between these ODMs, letting the two manufacturers produce different wattages for the same series."
Christoph Katzer - Thursday, October 30, 2008 - link
There was a sentence suggesting the TX650 could be also CWT, but I changed it after.Soubriquet - Thursday, October 30, 2008 - link
Thanks for the article, one suggestion for future consideration, it would be interesting to see some of the graphs comparing like for like with with other PSUs.