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nedkelly
16-06-2013, 04:53 PM
So just had first powercut of the winter, and I am now thinking about putting my main pc onto a UPS so I dont lose what im doing again.
What size or VA UPS would be needed for a single screen with a pc with a 750w psu in it?
I only need like 5 minutes max to shut it down.

dugimodo
17-06-2013, 11:07 AM
Best Idea in my opinion is to get a cheap watt meter and plug everything you want to connect to a UPS into it and fire it up, load the PC up with a game or something like video encoding to get it using power and see what the actual figure is. Everything else is just guesswork. Most UPSs should have the rated load in watts somewhere in the documentation as well as the VA rating and it tends to be significantly lower. Without looking it up I think it's something like 60-70% of the VA rating depending on power factor. A UPS somewhere in the 650-1200VA range is probably what you are looking at but you need that measurement to know more accurately.

dugimodo
17-06-2013, 11:15 AM
try one of these sites;

http://www2.middleatlantic.com/UPS/Search.aspx
http://www.csgnetwork.com/upssizecalc.html

1101
17-06-2013, 11:54 AM
Dont get the cheapy UPS's
Also, look closely at the spec of the PSU, a "650" is not 650VA or 650W .
Look at the output voltage, 230 +/- 10% is a horrid spec

Theres a thread about nasty UPS's on that other forum. Some brands have proved to be outright dangerous (fires, overheating, exploding)

pablo d
17-06-2013, 12:28 PM
I tested a CyberPower VALUE1200ELCD and it lasted 5 minutes and 11 seconds powering a PC that was pulling ~350W at the wall. =<$250NZD:

http://pricespy.co.nz/product.php?p=1723853

jupiter1
05-07-2013, 04:37 PM
I bought one from Computer Dynamics in 2002 still go strong.
They have outlets at Akld and Chch
Not too expensive either.
Mine is 600watt batteries readily available at electrical outlets.

see www.cdlnz.com

jupiter1
05-07-2013, 04:38 PM
I bought one from Computer Dynamics in 2002 still go strong.
They have outlets at Akld and Chch
Not too expensive either.
Mine is 600watt batteries readily available at electrical outlets.

see www.cdlnz.com