A better idea is to get an inverter, that's about 250 to 300 USD, that works for like 4 hours with quite a bit of electrical domestic equipment. So the ides is to have it just for the rig and not the other electrical equipment. Then connect a simple 1200VA UPS to it and then the rig.
So incase of a power failure , you have no system shutdown for atleast a good 6 hours. And in todays time of technology, I doubt a place that uses an i5 3550 and 16GB of RAM to have a power cut for longer than 2 hours.
I think peoples hv gt me wrong... i wanted a ups that supports my pc consumption power, which will run for more than 24 hours, but not with that ups. We hv hardly 10-15 mins power failure in our campus in a day. i wanted back up for just 15-20 mins for running my pc.
thank you all for ur reply and i bought a numeric 1 kva ups..
can u please tell me about the difference between hd 6670/6770... how much effective... is 6670 enough sufficient for 3d turbine modelling with i5 3550, z77mx-d3h motherboard....?