Hello I am thinking about buying the APC Back-UPS ES 700VA 230V UPS. I calculated that after the upgrade from my old GTX 660ti to GTX 1060 my power usage will be about 478 W, and the recommended UPS is 900 VA according to PSU calculator. I also use two monitors with power consumption of 26.10 W (primary) and 50 Watt (secondary) and Philips 2.0 computer speakers. In case of power outage I just need my computer and primary desktop to work for about 2min to allow me to save my work and shut down the PC.
I am not sure how does it works exactly, does it mean that if I will buy 700 VA UPS and there is electricity outage, it will provide electricity for a shorter period of time (on the website they say that Typical Backup Time at Full Load is 3.9 minutes (405 Watts)), or will it not hold at all because required Wattage is too high?