Question I have 2 gaming pcs. How do I choose the right nobreak?

[peterCasteli]

So I need to buy a Nobreak to hook up my 2 gamings pcs. I don't plan on upgrading any internal components, ever. One of them has a 2gb gtx 650ti and a 600w ps, and the other one has a 8gb gtx 1070 ti and a 550w ps. So here are my questions:
1: I thought all I had to do was combine the 2 wattages of my two pcs's power supplies, and then get a UPS with the same or higher capacity. Am I right, or there's more to it than just that?
2: Do I only take in consideration the wattage of the 2 power supplies? Because if the power supplies can handle the pcs workloads, the UPS just needs to handle the power supplies, right?
3: If the pc draws more power than the ps can supply, will the ps then draw more power from the UPS? Or does the ps act as a barrier, and doesn't let the pc draw more power than the ps can supply?

 

[fralexandr]

1) Pretty much. Some power supplies are capable of outputting more than their rated spec. However, your PCs probably won't use anywhere close to the rated spec on the power supply. Assuming normal components from computers with those graphics cards, the 650ti PC probably uses ~250w or less and the 1070ti probably ~350w or less at full load at the wall. Those are just estimates, however and actual power consumption will depend on what components, any overclocks, and what loads are applied.
2) you should also consider the monitor/display which depending on size and age might use around ~20-40 watts each.
3) Sort of. Many of the high end powersupplies can actually output more than their rated specs, while there are also low end power supplies incapable of outputting what they claim.

If you have the budget for it and you lose power pretty frequently, you might want to look into getting a pure/true sinewave unit as opposed to a stepped/simulated sine.

 

[VirtualLarry]

Is a "Nobreak" what they refer to a "UPS" or "battery backup" in some countries? I've never heard that terminology before.