TheBR Posted April 21, 2009 Share Posted April 21, 2009 I think the thread title says it all, but I picked up a Power Sentry UPS rated at 850 VA for a little bit of cash. Now, whenever I run it on battery power or its test mode, the PSU (Not the UPS) starts buzzing. When switched back to normal AC power, the buzzing stops. Is this in any way harmful to my PSU and should I refrain from using the UPS? For the record, the system operates fine while running on battery power. Thanks for the help! Link to comment Share on other sites More sharing options...
Corsair Employee RAM GUY Posted April 22, 2009 Corsair Employee Share Posted April 22, 2009 The noise would not indicate any functionality issue with the UPS or the PSU, and there will be no risk of damaging anything. Some battery backups which do not use a true sine wave (sounds like yours could be a simulated sine wave) can cause a mild buzzing noise, but it is nothing to worry about. Link to comment Share on other sites More sharing options...
TheBR Posted April 22, 2009 Author Share Posted April 22, 2009 The noise would not indicate any functionality issue with the UPS or the PSU, and there will be no risk of damaging anything. Some battery backups which do not use a true sine wave (sounds like yours could be a simulated sine wave) can cause a mild buzzing noise, but it is nothing to worry about. Okay sounds great. Is it also okay that this happens if the computer is powered off (PSU is still on, and LED is on on my Mobo) and not running? Link to comment Share on other sites More sharing options...
Corsair Employee RAM GUY Posted April 22, 2009 Corsair Employee Share Posted April 22, 2009 That should not cause any problems, does it still do it if you have the PSU plugged directly into the wall? Link to comment Share on other sites More sharing options...
TheBR Posted April 22, 2009 Author Share Posted April 22, 2009 That should not cause any problems, does it still do it if you have the PSU plugged directly into the wall? Nope, and same for the surge protector. Completely silent. Link to comment Share on other sites More sharing options...
Corsair Employee RAM GUY Posted April 22, 2009 Corsair Employee Share Posted April 22, 2009 Sounds like its likely just due the simulated sine wave of the battery backup when running with a high efficiency PSU, shouldn't be anything to worry about. Link to comment Share on other sites More sharing options...
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