Computers Tips : How to Choose an Uninterruptible Power Supply


My name is Jonathan Ayres. I own Network For
Success, an IT company. And today, we’re going to talk about how to choose an Uninterruptible
Power Supply also known as the UPS. Now the question arises immediately. How do I pick
a UPS? When there are so many available. And what parameters do I look for? So let’s start
off, by thinking about what a UPS actually is. A UPS is a battery in a box. And what
is it used for? It’s used to protect your computer from power outages and other power
problems. You could have a power outage caused by the electricity company coming into your
house. Or by a component in the computer, breaking. It could be the fan or some other
device. Or we’d want to turn the computer off or cause a problem with the way it’s running.
An uninterruptible power supply will provide electricity continuously for the amount of
electricity that it has stored in the battery. In it’s box. Now I have my arm resting here
on an uninterruptible power supply. And inside this gray box that we’re looking at here.
Is just nothing, other than a storage battery. Just like you have in your car. This battery
is providing power to your computer through various outlets on the back. And we look here
on the back. We can see that we have a number of chords pugged in. And these chords will
be going directly to your computer. And we also have some other possibilities on the
back of an uninterruptible power supply. We have a serial cable outlet. And we also have
protection for telephone and a fax modem. And what that protection is, is basically
not just to always provide electricity. But also for spikes in electricity. So it’s always
a good idea if you have a telephone or fax. To have them plugged in. If your power supply
provides that. Now this serial port that I have, my finger pointing out over here on
this side. Is for monitoring the UPS. And the reason you’d want to monitor it, is to
see you know. If the battery is being charged regularly or if it’s providing a good level
of electricity. Each company that makes another uninterruptible power supply has it’s own
software program. That will show you very states of the UPS, at any given time. If you
want to monitor them. Typically, these are used by companies that are using power supples
for corporations. That have a lot of computers. And need to protect them. And then they have
people that monitor them all the time. So when we’re going to look for a power supply,
we want to look for these different features. But mainly, the number one issue, one would
look at is. Is there going to be enough energy in the battery to run my computer? So the
question arises, how much energy does a computer take? Just one computer. And a regular desktop
computer that you would have in your home. Would typically run between four and six hundred
watts. So when you go to look for a UPS in a store. They’re going to have watt sizes
on the outside of the box. It’s going to say, here’s the UPS. It will provide you with 400
watts of power, 600 watts of power, 800 watts of power, 1200 watts of power. So if you had
two computers, you’d want to go for an 800 watt power supply, uninterruptible power supply
. So that would be, how you’d pick one. And I would give you the rule to always look at
whatever you have plugged in. And multiply it, times one and a half. So for example,
if you had a 400 watt computer. Buy a 600 watt power supply. That would be one and a
half times 400 or 600. It will be the same thing for having multiple devices plugged
in. So if you had your fax machine plugged in. You’d want to find out, how many watts
that fax machine operated on? Add that into the equation. And then give yourself a fifty
percent buffer or one and a half. This is a good way for you to be able to pick what
type of uninterruptible power supply. That you want to buy.

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17 thoughts on “Computers Tips : How to Choose an Uninterruptible Power Supply”

  1. Atomic Gumbo Surprise says:

    So, is the DC from the storage battery electronically converted into AC just to be rectified back into DC by the computers power supply?
    Wouldn't it be easier to have the IPS provide the DC directly to the output harness from the PC power supply?
    Thanks for the vid!

  2. Geo rge says:

    are Peripheral and molex conectors the same?

  3. Geo rge says:

    hello i got :
    1 x 20/24-pin ATX Connector
    1 x 4-pin P4 Connector
    3 x Molex IDE Connector
    1 x Floppy Connector
    1 x SATA Connector

    can i buy a psu with:
    1 x 20+4-pin ATX
    1 x 4-pin CPU
    1 x 6-pin PCI-E
    3 x SATA
    4 x Peripheral
    1 x Floppy

    does the new one have all the cables i need that are in the old one?

  4. sidrialgr says:

    I believe this guy is wrong.The energy the computer uses is always less than the PSU.For example if you had a 450watt psu your computer would use when everything would be working in it's max power about 400-420 watts.The component tha uses most power is the GPU,the only way you could reach 400-420 watts would be if you were playing a hardcore game,having your GPU,HDD,RAM memory and every component working in it's max level,which for a simple user would never probably happen

  5. Man of Culture says:

    @motonegros umm yes

  6. syncmaster710n14 says:

    This information is helpful but what I hant to know is how long a supply will last. you see ware I live we get alot of 10-20min power outages so i want a ups that will last about 30min. It will only be runing a small server about 500 watts.

  7. DOW234 says:

    @Pedobear946 check newegg PSU calculator or ASUS PSU calculator

  8. ThomasGrillo says:


  9. aldwin allan Tan says:

    Sir just a question. When computing for the total power in my CPU using psucalculator, it yield a wattage of 435W. So i decided to use a 550W psu to have an extra power when i later use X-fire. My question is:
    1.) Should the power of my UPS be MORE THAN the power of my PSU?
    2.) Or it should be MORE THAN the power i needed in my CPU (435W)?

  10. Perplexer1 says:

    I have that digital Watt meter with LCD display plugged into the wall socket and it shows me that my computer together with 24" LCD monitor uses 140W. Three of my computers together including a server PC with 5 hard drives use 350W. So those 400W to 600W consumption per computer is a big nonsense.

  11. LiPe VoLcOm says:

    one thing that no one says is how much Run Time will give us to use! i Know Volts X Amps equals Wattage but the battery do not goes full drain to just calculate this ! I got Four 7ah Lead acid ups batteries plugged in parallel and soon ill have the review to finally know from myself the answer and share on a video here on youtube!

  12. kazi789 says:

    my desktop has a 600 Watts power supply. And i am not sure what UPS to get. I just wnat to plug in my desktop and monitor for like a few minuts, to shut it down safely.
    Can someone tell me what UPS i should get for a 500w and a 600w power supply?

  13. Indaus says:

    he had a really hard time saying "uninterruptable"
    good video though!

  14. Perplexer1 says:

    Yeah but we're talking "idle" computer consumption, ie. Windows environment. Of course if you're playing a game or playing/encoding a high definition video the power consumption will go way up but you're not gonna be doing that while powered by a UPS. No UPS can handle that for more than 3 minutes. You need to consider "idle" power consumption so you can calculate how much time you have to save your work and shut down. UPSs aren't meant to keep you going playing games during blackouts.

  15. Maco Lord says:

    Try running 2 GPU's running in SLI or Crossfire and a CPU running at 4.7 GHZ on a 350 watt PSU. Wattage is not the only factor in a PSU

  16. Roguejedi165 says:

    a 1050 watt UPS = ((600 Watt PC+ 100 Watt Monitor) x 1.5)

  17. sanu p saji says:

    how to choose ups for data center? pls give me a class

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