[Shashikiran Swamy]

I have
CPU Intel Core i5 4460 @ 3.20GHz Haswell
RAM 8,00GB
Motherboard ASRock B85M Pro3
VGA 4095MB NVIDIA GeForce GTX 970
Monitor 27" BenQ GW2765 (2560x1440@60Hz)
SSD 223GB KINGSTON
Generic USB Disk +1TB Toshiba External USB 3.0
DVD-RW HL-DT-ST DVDRAM GH24NSD1 SCSI CdRom Device
Antec 650W i Printer HP DeskJet

[bill-e]

What is the combined INPUT wattage of your computer's power supply, the monitor and the printer? Once you have that, and that will be a worst case power consumption, you can appropriately size your UPS.

Personally I wouldn't my the printer on an UPS unless it was mission critical....I would have all my internet/network modems/switches on it though.