Hello all, Simple question for you all. I have a desktop PC that has a 500W 250A power source and an old Compaq v710 CRT monitor. I was wondering if anybody knew how large of VA UPS I should get to power these when the power goes out. If possible I would like to have it power them for 1 to 2 hours before the battery goes dead. If any of you can help that would be wonderful. Thanks, Lunar21