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What size UPS do I need? - Page 2

post #11 of 15
Thread Starter 
Quote:
Originally Posted by JJFIVEOH View Post

Most of the reason I got the PFC model is the pure sine wave output. I have read this is suggested for use with PFC PSU's and Corsair may or may not guaranty their PSU's if a pure sine wave UPS is not used.

Thanks for that! I'm glad I didn't go with this FS EP I was looking at. Specs say simulated sine wave, NOT pure sine wave. I googled a bit and it seems pure sine wave UPSs are recommended for PFC PSUs and my Corsair PSU is definitely PFC Active.
post #12 of 15
Quote:
Originally Posted by F4ze0ne View Post

OP,
CyberPower CP1350PFCLCD UPS 1350VA 810W PFC Compatible Pure Sine Wave
This is the UPS I'm currently using for my sig rig. It can handle Active PFC power supplies! I get about 15-20 minutes before I have to shut down in desktop mode (normal load).
From the user manual, it's recommended that the system not pull more than 80% of the UPS capacity on the "battery outlets." You can test with a "kill-a-watt" unit (under load for headroom) to see how much you really need. thumb.gif
Unfortunately, I was unable to find this unit in stores and had to order it from Amazon (It's available on Newegg as well).
One thing to note... UPS's units are usually non-refundable items because of shipping weight. Check the online store's return policy on the unit before you purchase.

I am using a pure sine wave Cyberpower too. I've got 2 of them powering 2 of the rigs in my sig. I would recommend nobody else. theyve saved my system countless times and the software for automatic shutdown after set time or before set battery power is INVALUABLE
Quote:
Originally Posted by JJFIVEOH View Post

Most of the reason I got the PFC model is the pure sine wave output. I have read this is suggested for use with PFC PSU's and Corsair may or may not guaranty their PSU's if a pure sine wave UPS is not used.

^ absolutely this
 
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post #13 of 15
Thread Starter 
After reading some more extensive discussions on the subject, here's what I've concluded so far and I hope they're accurate.

The need for pure sine wave UPS when using PFC PSU

1. If you can afford it, get it and stay with your PFC PSU. PFC PSUs apparently require less load from your UPS.

2. If you're on a 120VAC line, you're fine with a non pure sine wave UPS.

3. If you're on a 240VAC line like I am, unfortunately, non-pure sine wave UPSs are not good if used frequently or for long periods but even then, it's not exactly a death sentence for your PSU but it is a sensible warning to consider. This pertains to the battery use of course. These sine wave thingies apparently kick in when your UPS gets no power and starts running on battery.

Seeing as I don't get that much power outages in my area and I just need it to give me time to shutdown my PC properly and probably save some open files, I think I'll be fine with a non pure UPS. Also seeing that there's no widespread panic over this, somehow I feel like I've known all along. That I'd be fine that is. It's the need to know for sure that often overwhelms me. Ignorance is bliss indeed.
post #14 of 15
I own 4 of these:
http://www.amazon.com/CyberPower-CP1500PFCLCD-Pure-Sine-1500VA/dp/B00429N19W/ref=sr_1_1?ie=UTF8&qid=1331429056&sr=8-1

They use to be like $155 though. As other said, this is the lineup to get.
Quote:
Originally Posted by Cavi Mike View Post

You seriously have your subwoofer plugged into it? *faceplam*

Why would that matter? I have my sub hooked up to one of my UPS. It's a $600 subwoofer, why not?
Edited by Murlocke - 3/10/12 at 5:28pm
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post #15 of 15
Quote:
Originally Posted by Froix View Post

After reading some more extensive discussions on the subject, here's what I've concluded so far and I hope they're accurate.
The need for pure sine wave UPS when using PFC PSU
1. If you can afford it, get it and stay with your PFC PSU. PFC PSUs apparently require less load from your UPS.
2. If you're on a 120VAC line, you're fine with a non pure sine wave UPS.
3. If you're on a 240VAC line like I am, unfortunately, non-pure sine wave UPSs are not good if used frequently or for long periods but even then, it's not exactly a death sentence for your PSU but it is a sensible warning to consider. This pertains to the battery use of course. These sine wave thingies apparently kick in when your UPS gets no power and starts running on battery.
Seeing as I don't get that much power outages in my area and I just need it to give me time to shutdown my PC properly and probably save some open files, I think I'll be fine with a non pure UPS. Also seeing that there's no widespread panic over this, somehow I feel like I've known all along. That I'd be fine that is. It's the need to know for sure that often overwhelms me. Ignorance is bliss indeed.

I wouldn't recommend it. One of the issues I've read with a PFC PSU and a non pure UPS is that the computer will shut down when you take a power hit or outage. I had my old UPS combined with this current comp until it died. The battery was on it's way out, but when I took a power hit the computer would shut off immediately. If the UPS and PCU are not compatible chances are you may not even be able to shut your comp down during an outage because it will shut off as soon as the power goes out. From what I've seen the extra price for a pure sine wave UPS is very minimal. Look for Newegg specials, like I said earlier I picked up that 1350 for $150 which happened to be less than Cyberpower's 1100 non pure UPS.
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