CORSAIR 650W with UPS Pro 1500 APC battery backup

[jbaccrington_apc]

This was originally posted on APC forums on 11/26/2013

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Hi

Just came back and turned my PC on, after about 5 to 10mins the PC Power Supply started buzzing and windows7 froze, couldn't move my mouse cursor. Had to turn the power off on the UPS using the power off switch.

I had posted before about my Pro 1500 APC battery backup causing my CORSAIR 650W to buzz during battery backup.

What options do I have?

Return the UPS?

thxs

Jonathan

[BillP · Accepted solution]

This reply was originally posted by Llewellyn on APC forums on 11/27/2013

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Hi Johnathan,

One possible problem might be that the UPS outputs a square wave when running on battery operation. Have a look at this post:

http://www.tomshardware.com/forum/352692-28-will-corsair-work-sinwave-square-wave#.

If the UPS is a Back UPS Pro or any kind of Back UPS it produces a square wave output. You can try and get you hands on a Smart UPS which is more expensive than the Back UPS but it produces a pure sin wave output when running on battery power. A smart UPS will also be a more efficient UPS.