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Topic Title: "540 Watt" UPS for a 750 watt Power Supply?? :-(
Topic Summary: Can I use a 540 watt UPS for a 750 watt PS and run for a shorter time or should I return the unopened box?
Created On: 11/26/2010 02:06 PM
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 11/26/2010 02:06 PM
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Shurguywutt
Newbie

Posts: 36
Joined: 03/02/2010

I purchased the APC BX900R 900 VA Back-UPS Battery Backup - 900VA, 120V, 540-Watts, Black from Tigerdirect today for black friday. When I got home I noticed that the box only said 540 watts... lol If you look in my signature you will see that I have a 750 Watt power supply (and a few other things I would need to run on the UPS).

So I was wondering, can I use this UPS even though my comp is a lot more power hungry and just use the device for a shorter time? Or will this be bad and should I just return it because the box is still unopened.

Thanks.

http://www.tigerdirect.com/app...dpNo=3612224&CatId=234

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Asus M4A78T-E
AMD X4 965 Black Edition 3.4GHz (140 Watts)
8GB Mushkin 240-Pin DDR3 SDRAM DDR3 1333 (PC3 10666)
ASUS EAH4890/HTDI/1GD5 Radeon HD 4890
WD Raptor WD1500HLFS 150GB 10000 RPM
Seagate LP ST31500541AS 1.5TB 5900 RPM
Antec TruePower TP-750 750W
Enzotech Extreme-X Rev.A 120mm 2 Ball CPU Cooler
Antec Twelve Hundred Black Steel ATX Full Tower
WIN 7 HE 64-BIT
 11/26/2010 07:38 PM
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Liqourice
Case Modder

Posts: 1616
Joined: 08/31/2008

I seriously doubt that your computer draws 750W 24/7.

Depending on what you're doing that UPS will do fine. Gaming when you're powered by it is probably not a good idea but just surfing and doing some light work will be just fine.

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Main Rig:
Cooler Master HAF 932 Full Tower : Corsair 750HX Modular PSU : Asus Crosshair III Formula : Phenom II X4 965 125W
Corsair H-50 CPU Cooler : Corsair Dominator GT DDR3 1600 7-7-7-20-1T 2x2GB : WD Caviar Black 32MB 640GB : Sapphire HD5870 Vapor-X
HTPC:
Antec Fusion Remote Black : ASUS M4A785TD-M EVO : Athlon II X2 240e : Crucial BallistiX 1600 2GB x2
Corsair 400W : Sapphire Radeon HD6850 : Lite-On iHBS112 BD-Burner : WD Caviar Green 500 GB
 11/28/2010 11:51 AM
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TLH
Moderator

Posts: 3641
Joined: 11/19/2004

I have a APC Smart-UPS 1000VA and only draw roughly 35% when running gpu folding. I think it goes up to around 44% when I cpu fold aswell. I only get around 6-7 minutes of run time in a powercut but that's more than enough to shut down.

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The opinions expressed above do not represent those of Advanced Micro Devices or any of their affiliates.

1100t on M5A99x-EVO with 2x4gb and 6870 running Win7 on Force120 ssd in Corsair 600t cooled by H100. Folding for team 34106
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