Raible Posted February 19, 2008 Share Posted February 19, 2008 I recently got me a wattmeter and proceeded to measure my PC. What I found was.. strange. It seems my TX750 is drawing 'lots' of power while apparently doing nothing. Here are some of the numbers: Unplugged, unconnected and turned off PSU: 0W (duh!) Plugged into 230V AC: 13W PSU switched on: 27W PSU switched on and connected to the mobo: 29W PC running, showing BIOS setup: 116W For comparison I also checked with a random no-name 300W PSU, all other things being equal: PSU plugged in and connected to the mobo (doesn't have a switch): 9W PC running, showing BIOS setup: 146W Which in effect means, the cheap PSU draws 20W less while the PC is turned off, and 30W more while the PC is running. And the TX750 is drawing 13W while its switch is off(!). Which begs the question.. why? And am I the only one? Link to comment Share on other sites More sharing options...
Corsair Employee RAM GUY Posted February 19, 2008 Corsair Employee Share Posted February 19, 2008 The Active PFC circuitry of high-end PSUs interferes with wall-mounted wattage meters. Your other PSU most likely does not have Active Power Factor Correction. Link to comment Share on other sites More sharing options...
Raible Posted February 20, 2008 Author Share Posted February 20, 2008 Wondering why that might be so I did some research, and for everyone else who may be wondering, at least part of the answer seems to lay of course here: http://en.wikipedia.org/wiki/Power_factor_correction ..but also, and partly contradicting Wikipedia, here: http://www.dansdata.com/gz028.htm And the answer to whether I have to pay for those 13/27W the wattmeter is showing when the PSU is doing nothing seems to be... maybe. Perhaps Ram Guy knows a bit more about it.. A switchable power strip seems like a good idea though. Link to comment Share on other sites More sharing options...
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