Uninterruptible Power Supply inquiry

alonbl

Member
Apr 25, 2013
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Hello I wanted to know what UPS do I need. I found some nice UPS that I think will be enough what do you think: http://www.fsp-europe.com/professional/ep850.php

Motherboard: Gigabyte GA-Z77-D3H
CPU: Intel i7-3770K @4.3Ghz stock volt
RAM: Corsair Vengeance 2x4GB 1600MHz LP 1.35V
PSU: Seasonic SS-750JS 750W
Cooler: Noctua NH-U12P SE2
Case: NZXT Whisper 4-fans
GPU: EVGA GeForce GTX 770 SC w/ACX Cooler
Hitachi 1tb & HDD #2: Seagate 2tb & External HDD Lacie 2tb
Optical Drive: LG DVD Black Sata
Monitor #1: Dell WA2209 22" IPS Panel
Monitor #2: Panasonic 3D Plasma 42" TH-P42UT30M (not always on)
Speakers: 5.1 Yamaha NX-P120
Receiver: Sharwood RD-6405R
 

mfenn

Elite Member
Jan 17, 2010
22,400
5
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www.mfenn.com
You'd need to buy a truly monstrous UPS to handle that plasma, I definitely wouldn't put it on one.

Leaving out the plasma, the 480W is cutting it a little close if you plan to run the PC at full load when the UPS is active. Your computer will draw ~350W while gaming, which only leaves 130W for everything else. Probably best to step up to the EP1000 from your vendor.
 

mikeymikec

Lifer
May 19, 2011
18,597
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OP, is your intention for a UPS to shut down your computer cleanly, or continue gaming, or working, or what?
 

alonbl

Member
Apr 25, 2013
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My intention is for a clean shut down after 5-15 minutes. Even better will be if there is an option that when I'm not near the PC that it will shut down windows properly. I don't live in USA or Canada so I cant buy from there newegg. The stores here have very small selection of UPS. If I exit the game right away 850 is enough?
 
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Charles Kozierok

Elite Member
May 14, 2012
6,762
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If you look at the bottom of the page, you'll find a table with estimated runtimes for various loads. The 850 probably is enough if you're just going to use it for a safe shutdown or putting the unit into sleep mode, and it seems to come with control software (though it appears to be third party.) Notice how ridiculously low the runtimes are near full load.

This appears to be the software they use, so you can check it out and see what it does.

Bear in mind that batteries degrade in capacity almost immediately so some extra headroom is a good idea.
 
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sm625

Diamond Member
May 6, 2011
8,172
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Good luck finding a UPS the can keep that beast up and running for 10 minutes. If its idling maybe, but I would completely discard the idea of being able to do anymore than save and exit your game and shut down.
 

Compman55

Golden Member
Feb 14, 2010
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I will add somthing important that people often overlook. UPS units will degrade a battery in approx 3 yrs. In rare cases certain combinations of good quality batteries, or a good charging system, you *may* get 5 yrs. After which the battery will become unusable.

On mine I have found the batteries to cost 50% to 75% of the cost of a new UPS.
 

Charles Kozierok

Elite Member
May 14, 2012
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I will add somthing important that people often overlook. UPS units will degrade a battery in approx 3 yrs. In rare cases certain combinations of good quality batteries, or a good charging system, you *may* get 5 yrs. After which the battery will become unusable.

Batteries rarely become entirely unusable unless they're abused; they just slowly fade away.

That's why I suggested oversizing to some extent. I have a 1500 VA rated UPS that's now, oh, 7 years old, and while it won't keep my full-sized tower/desktop system running for very long, it will keep it going long enough to let me shut it down or sleep it.

Temperature is also an important factor. The old battery paradox is that the cooler the battery is, the less power you can extract from it, but the longer it will last.