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Battery backup Question

post #1 of 7
Thread Starter 

I asked this once before but I have another question. I got my hands on a CyberPower 425VA SL found here. I got this for free & I am wondering if it will be a good backup for Power Surges. We Never have complete power outages just surges for a split second then the Power is right back on. It only happens once per year. the Power will surge then within 5-10 seconds power is back on. Will this be good enough for just surges.

 

The box says 255 watts im assuming my PSU is 2 much for it since my PSU is a 600 watt? I only need a UPS that will last atleast 2-3 minutes if a power outtage ever happened just for a safe shutdown. My last rig I did not have any Power protection and my apartment surged. Power came back about 5 seconds after that but the PC never did. Friend my Mobo, HDD & 1 stick of ram. I am trying to avoid this again

 

 

http://www.bestbuy.com/site/CyberPower+-+425VA+SL-Series+Battery+Back-Up+System/6201585.p?id=1069297060711&skuId=6201585

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post #2 of 7

A UPS with a battery will offer better protection against surges than a standard surge protector in most cases.

 

However, if you exceed the power maximums of the UPS, it will behave just like a surge protector and have no battery backup capability at all, which can still damage your system.

 

In your case, that UPS would be good for plugging your DSL/Cable Modem and Router into, and providing uninterrupted power for your internet connection, but worthless for your PC.

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post #3 of 7
Thread Starter 

How do you know which you would need. These are APC brands at bestbuy. Am I supposed to get something to match my PSU Power?

 

350va (200Watts)

450va (280 Watts)

550va (330 Watts)

650va (390 Watts)


Edited by 4LC4PON3 - 2/9/12 at 2:21am
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post #4 of 7
Thread Starter 

anyone?

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post #5 of 7
Pretty sure you want to match the wattage you are pulling from the wall, not necessarily what your psu is rated for. A Kil-a-Watt will tell you exactly what you are using, or you could just check out Phaedrus's psu calculator to get a general idea.
post #6 of 7
Yep the UPS only has to provide enough wattage to cover what your system pulls. You likely could get away with a 450w or maybe less. Of course if you plan on expanding, SLI/x-fire then you will want to take that into account for your choice.

APC are a great choice, I recommend Cyberpower also, have used both and they work well.

For reference, my Work Rig, listed below is pulling 320 watts from my APC UPS (according to the software), cpu isn't loaded to much right now, but I am folding on gpu so that is 100% usage.

The 2 monitors are significant though at around 50w each. Oh I also have a phone, 2 printers (idling) and router connected.
Edited by Faster_is_better - 2/9/12 at 11:15am
post #7 of 7

My system will pull 570 W from the UPS with a single GTX 580 and my i5-2500K both at 100% load. (Note that both are overclocked).

 

An APC 1500VA model gives me about 6 minutes of backup protection at that rating before it goes down.

 

An APC 850VA model gives me < 2 minutes of theoretical backup protection, but in reality will shut down almost immediately.

 

If I attach two monitors into the mix, the 1500 model lasts for 4 minutes and the 850VA model goes into overload mode and will fail when the power fails.

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