A UPS (uninterruptible power supply) is a device used to provide instant backup power to critical systems for safe shutdown in the case of a power outage.

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If my power supply is 700w, do I need a 700w UPS?

if my power supply is 700w, do I need a 700w UPS? I am running dual 20" dell LCD's, a i7 quad core system with a radion 4870 1gb video card, 2 hard drives.
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2answers
1k views

Is the APC BR700G UPS (or similar) compatible with Active PFC power supplies?

I'm looking at getting a UPS for my home computer. So far the APC BR700G looks very promising, except for one thing: one of the reviews on Newegg says that this UPS does not work with a power supply ...
8
votes
6answers
6k views

Is UPS necessary to have for a PC?

Can my computer components ( Monitor, Motherboard, RAM, HDD, CPU, SMPS) become damaged due to a sudden power flux. It's only needed to shut down Windows properly. Can I solve both Hardware and ...
6
votes
4answers
7k views

Why PC reboots when there’s a power failure even with UPS?

I've purchased a Line Interactive UPS 1200VA. It's supposed to give 8~20min backup (as written in the manual). This UPS has transfer time < 10ms. It works fine when the mains is active. But the ...
62
votes
4answers
30k views

Why shouldn't I attach laser printers or scanners to a UPS?

I have an FSP EP1000 UPS. The User's Manual says: CAUTION: NEVER connect a laser printer or scanner to the UPS unit. This may cause the damage of the unit. Why is this restriction?
19
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8answers
842 views

Is a UPS a good investment for a home machine?

Is it worth the money to invest in a battery-backed UPS unit for a home machine? Or is it a waste of money? The purpose of the UPS would be to prevent a "meltdown" of the computer due to bad power ...
2
votes
4answers
251 views

Laptop Malfunctions After UPS Failure? I Have Got What I Deserved

My UPS failed today and laptop ceased working. UPS failed me before 1 time and it was when laptop was on standby but nothing happened to the laptop however. Also there were times when laptop was ...
35
votes
5answers
20k views

When do I need a pure sine wave UPS?

I would like to buy a rack UPS that would support all the IT related electronics in a SOHO room. This include switches, routers, PCs, servers, NAS. During my research I found out that there are ...
4
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3answers
3k views

System connected to UPS goes to sleep short time after power is lost

I have a Win7 x64 system connected to the UPS. The UPS is capable of maintaining the system power for about 30 minutes. After I have connected the UPS, I have verified this by disconnecting the power ...
6
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1answer
2k views

Windows 7 goes into hibernation immediately after the UPS kicks on

I have a UPS that will power my desktop computer for 50 minutes. The idea was that if the power when out I could save/make notes on what I'm working on and then shutdown or hibernate the desktop. But ...
6
votes
2answers
2k views

Is it okay to use a UPS without a ground?

I have a UPS unit that I would like to use for a workstation installation that does not have a valid ground (in the Philippines, a true ground is a luxury). I am not an Electrical Engineer, but I ...
5
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2answers
12k views

What is better for power problems, a UPS or a voltage regulator?

I live in a cheap flat filled with expensive, sensitive electronic devices. There is only one electric circuit for everything to plug in. Several times a day, the fridge's compressor wakes up, and ...
3
votes
4answers
6k views

computer shutoff suddenly, I have a APC backup UPS SE 350

My computer suddenly shutoff (abruptly), and then the APC (UPS SE 350) started to beep continuously. I pressed the button on it and it stopped, then I pressed it again and it turned on (green light) ...
3
votes
3answers
3k views

Computer hangs due to underpowered UPS?

I just bought a new UPS. Now since I started using it I experienced at least 3 random freeze in Windows 7 and it happens during the first 10 minutes of start-up. Note when I say freeze, I mean I ...
3
votes
1answer
43 views

CPU cores remain offline after hotplug

When my UPS triggers an "on-battery" event, I want all cores to switch off to conserve power. The PC has 8 cores on two chips, UPS batteries need replacement every 3 months because of high current ...
2
votes
5answers
3k views

What to look for in a good UPS?

I just asked this question where my PC may have been fried due to a power surge. Now I'm browsing around and I'm curious what characteristics make a quality UPS? What should I be looking at? Should I ...
2
votes
3answers
323 views

Need UPS communication software for Ubuntu

I have a server that should have an energy backup. I want to use some UPS for this. How to make it can communicate with PC, so it can makes the PC shutdown automatically? Whats software for ...
2
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0answers
379 views

APC UPS model:BR550ci-in How to Disable Minimum Load Turn Off

I got an APC UPS (Model No:BR550ci-in). I need to light a bulb(40w, 230volt) from it. The problem I am facing is Minimum Load Turn Off. My UPS auto-detects the load and if it doesn't meet the minimum ...
1
vote
2answers
1k views

Why my Computer re-starts at time of power outage?

My computer (sometimes) shuts down for a fraction of second and then restarts at time of power outage. The most weird thing happening is that when I switch off the electric supply of UPS (ie. where ...
1
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2answers
657 views

Is My PSU compatible with this UPS

I have this PSU and this UPS, however due to the PSU being/having an active PFC (power factor correction) it is incompatible with my UPS (at least according to APC tech support, for reference see my ...
0
votes
0answers
483 views

Why is my UPS causing my monitor to make a high pitched humming noise

I recently purchased a UPS for a new server build for my home. Since the server sits next to my desk, I figured I'd plug my Macbook and monitor into the UPS as well. That way if the power goes out, I ...
0
votes
1answer
321 views

Using a laptop without battery [duplicate]

Possible Duplicate: Are notebook batteries generally hot-swappable? My battery is at 50% wear and I was planning to use it on AC without the battery. I was planning to use an on-line UPS so as ...
0
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0answers
241 views

Agghhh! UPS Back-Up, Laptop Charger, Sparks

Boy… ok. This is so frustrating! Ok so, I've been getting a whole lot of problems with the electrical grid here lately: spikes, surges, lows, brown-outs, all kinds of problems, it's terrible, short-...
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1answer
37 views

recommended battery for 750 watt ups

I have a ups with capacity 750 Watt, please advise if i can use 175 Amp battery with 750 watt ups? otherwise please advise suitable battery capacity for 750 watt ups so it can perform good.