I'm trying to determine the size of the UPS I should buy. Ideally, I would like something to keep my system on for an hour in case of a power cut but I don't have the budget for that. Basically I want the best price to backup time ratio.
My monitor is a Samsung SyncMaster F2380. I tried to determine its power consumption. I can find here http://www.cnet.com/products/samsung-syncmaster-f2380/specs/ that it uses less than 40W, but when I try to calculate its consumption myself based on the information given behind the monitor, I get much more values. Here is what I see :
AC 100-240 1.0A
When I use the method described here https://superuser.com/a/128510/304534 I find 240W so I don't know who to believe.
Besides the monitor I have a PC with a core i3 4330 and a GTX 750 Ti. Based on these charts http://us.hardware.info/reviews/4993/27/intel-core-i3-4330--i5-4440-review-affordable-haswells-energy-consumption-igpu-cinebench-115-max I can see that it will require less than 100W.
So I'd like to know what is the actual wattage/consumption of my monitor, then what UPS would be appropriate. What can I expect from a 390 Watts / 650 VA UPS?
Thanks