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What size UPS do I need?

post #1 of 15
Thread Starter 
Just had a brownout earlier and everything shutdown. Apparently my Kebos Powergarde 600VA UPS can no longer protect my PC since I got me a Corsair VX550 watt PSU. What I want to know is what size UPS do I need? What's the minimum required VA I need. Not to say that I'll be getting the least VA that'll work but I just want to get an idea of the requirements I should be looking for.

What I currently have plugged in on my UPS:

ASUS VW228T - specs say it uses < 20 watts
Sony SRSD4 - power output sat 7w+7w and subwoofer 13w

and inside my CPU

AMD Phenom II X2 550 w/ Thermaltake Contac 29 cooler overclocked at 3.7Ghz 1.5V
Sapphire HD5670 1GB GDDR5
2x2GB Team Elite DDR3 memory
Corsair VX550 PSU

As you can see, I have quite the modest build. I thought I knew what I needed until I started googling and came upon power factors, active PFC, and all sorts of stuff and now I'm not so sure. I'm plugged in on a 220 volt if that makes a difference. Any help would be great thanks. If there's a good article that will explain all this to me, thanks for the links.
post #2 of 15
http://www.apc.com/tools/ups_selector/index.cfm

Tried this? around a 750-1000w i would assume. For expansion
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post #3 of 15
You seriously have your subwoofer plugged into it? *faceplam*
APU what?
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APU what?
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post #4 of 15
How long do you have it, are you sure you dont need battery replacement on your ups instead of a new one? Just try to have only your pc plugged on it.
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post #5 of 15
I use this model the APC BACK-UPS RS 1500VA 865W. Sell around $200
Part #: BR1500G
http://www.apc.com/resource/include/techspec_index.cfm?base_sku=BR1500G

This will help in your needs, plus room to grow your system. Plus I like the LCD on it, tells ya how much watts you are pull from your system.

On the backup part only my LCD, tower and external drive is plugged in.
The surge only side, is speakers and printer.

Amazon has it for $180
http://www.amazon.com/APC-BR1500G-BACK-UPS-10-Outlet-1500VA/dp/B003Y24DEU/ref=sr_1_1?ie=UTF8&qid=1330774018&sr=8-1
    
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post #6 of 15
Thread Starter 
Thanks for the replies. Not much choices from nearby stores. I'm looking at an 850 VA, I can't afford one better for the moment.

I just had my current UPS for about a year maybe less, so I don't think it's the battery. You might be right though, from what I understand so far it shouldn't make any difference what PSU I use, my whole setup should still be pulling the same power.

I finally did get an adapter for my speaker's 2 circular power plug so I could plug it directly in the outlet. I didn't realize it was using that much. Am I reading that right? 7 watts for each speaker and 13 watts for the subwoofer? So my sound system's actually eating up more power than my 22" LED? In any case, my current UPS can now carry my PC and monitor for a little over a minute at least. Just enough time for me to shut it down.
post #7 of 15
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.
post #8 of 15
I ordered the exact same UPS the other day at Newegg, it's on sale for $150. http://www.newegg.com/Product/Product.aspx?Item=N82E16842102133

My last UPS died and I got this as it's replacement. I highly recommend it, easy to use, nice LCD display and pretty good battery life...... at least according to it's own estimation. At idle with my monitor plugged in it's telling me I have 45-47 minutes of battery life.
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My Desktop PC
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My recent build
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Crucial M4 256GB WD Caviar Black 1.5TB 7200 RPM 6.0Gb/s Corsair H50 Windows 8.1 Pro 
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SAMSUNG XL2370-1 23" LED Corsair HX 750W NZXT Phantom Logitech Performance MX 
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Intel 4670K MSI Z87-GD65 EVAG 660 GTX Superclocked Mushkin 2X4 
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post #9 of 15
Well, just to let you know, I have my Rig, + monitor + External HDD plugged into a APC 750va... Didn't tried how long my computer will last, but I don't think you need a 1500va one.. if your computer can shutdown after 3-4 minutes normally, this is fine.. if while you play, you want more power to be able to close and shutdown the game, maybe a 1500va coule be good.

I used to have a 500va for a sempron 2600+, 4x HDD, running as a server, can keep 20mins on the UPS at idle.


My rig at the wall, idle doing nothing, it's about 80-90w... My 750va is 450w battery. if you keep you CPU with cool n quiet, that should do the work if computer is idling.

I think a 1000va should be fine for your computer, to last a couple of minutes.
Edited by ChristTheGreat - 3/6/12 at 7:18pm
post #10 of 15
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.
My Desktop PC
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My recent build
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CPUMotherboardGraphicsRAM
Intel i7-2600K ASRock Z77 Formula OC GeForce 470GTX Mushkin Blackline Ridgeback 2x4GB DDR3 2000 
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Crucial M4 256GB WD Caviar Black 1.5TB 7200 RPM 6.0Gb/s Corsair H50 Windows 8.1 Pro 
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SAMSUNG XL2370-1 23" LED Corsair HX 750W NZXT Phantom Logitech Performance MX 
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Samsung EVO 840 Asus DVD H100i 8.1 
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Corsair 650 Gold Rosewill R5 
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My Desktop PC
(15 items)
 
My recent build
(10 items)
 
 
CPUMotherboardGraphicsRAM
Intel i7-2600K ASRock Z77 Formula OC GeForce 470GTX Mushkin Blackline Ridgeback 2x4GB DDR3 2000 
Hard DriveHard DriveCoolingOS
Crucial M4 256GB WD Caviar Black 1.5TB 7200 RPM 6.0Gb/s Corsair H50 Windows 8.1 Pro 
MonitorPowerCaseMouse
SAMSUNG XL2370-1 23" LED Corsair HX 750W NZXT Phantom Logitech Performance MX 
CPUMotherboardGraphicsRAM
Intel 4670K MSI Z87-GD65 EVAG 660 GTX Superclocked Mushkin 2X4 
Hard DriveOptical DriveCoolingOS
Samsung EVO 840 Asus DVD H100i 8.1 
PowerCase
Corsair 650 Gold Rosewill R5 
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