Anyone using simulated sine wave UPS w/ active PFC power supply?

bgc99

Senior member
Aug 13, 2004
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I'm building a system with a Seasonic Platinum rated power supply and I'm wondering how a UPS with a simulated sine wave output will affect it, if at all?

Thanks,
BGC
 

OlyAR15

Senior member
Oct 23, 2014
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I bought an APC simulated sine wave ups, did not work reliably with my power supply, was very unstable. Ended up buying a cyberpower pure sine wave ups and relegating the APC unit to my cable modem and router. That way I still have Internet access in the event of a blackout.

Of course, your mileage may vary and your particular power supply may be fine with a simulated sine wave.
 

bgc99

Senior member
Aug 13, 2004
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Cyberpower is really the only choice if you want a true sine wave unit that is affordable for home use.
 

bgc99

Senior member
Aug 13, 2004
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I assume the APC units have fans, do they run all the time or just when the unit is on battery power? How loud are the fans? I'm trying to build a quiet pc which will be moot if the UPS has a loud fan.
 

WilliamM2

Platinum Member
Jun 14, 2012
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The SUA750's and 1000's have no fans.

The 2200's we use at work do have a fan, it runs when on battery, or charging. Probably a bit more than you need though, unless you are running servers.
 
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bgc99

Senior member
Aug 13, 2004
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No servers. I7-4770k, gtx 970, 3 or 4 case fans plus cpu cooler, 1 ssd, 3 hard drives.

I've been looking at the cyberpower pfc true sine wave series, but I'm open to others. I'm wondering if the 1500va unit is worth $40+ more than the 1350va unit in my case.

I turn off my pc when I'm not using it so I would be at it or nearby if a power outage occurs in order to shut down pretty quickly.
 

Blain

Lifer
Oct 9, 1999
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I'm building a system with a Seasonic Platinum rated power supply and I'm wondering how a UPS with a simulated sine wave output will affect it, if at all?
Yes, a 1500AVR Cyberpower (Simulated Sine Wave), and Seasonic SS-520GB active PFC.
I've been running this combo for 2 or 3 years now without any issues.
 

Red Squirrel

No Lifer
May 24, 2003
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Are Supermicro PSUs active PFC? Most of my servers are Supermicro and they're on a square wave UPS. I wish they'd make most UPSes and inverters pure sine though, I really don't get why they don't. It can't be that much more expensive to produce.

This is what a "simulated" sine wave looks like:



Another UPS, switching to inverter:



And back to AC: (that's the same UPS as first pic I think)