How does a UPS really work?

[tranzitbusbeast]

I've been thinking about getting a 450w UPS for my computer because my house has some power issues such as lights flickering when the Washer or Dryer is turned on, the Dishwasher being turned on etc. I've been told over time, these power dips can be extremely bad for computers. As im currently getting ready to build a new rig, I dont want these power dips to damage any components.

My question here is, will a 450w UPS be safe to run on a Mid-Tier gaming pc (RX 480, OC'd Ryzen 5 1600x and an X370). How does the UPS provide power when it feels like it needs to and do newer boards like an X370 and a decent PSU already have safety nets for things like this built in?

 

[CountMike]

UPS (Uninterruptible Power Supply ) works by storing power in (mostly inside) mounted battery which is constantly kept charged and when there's an interruption (or sufficient voltage drop) of power it converts battery power to specified output AC voltage. They are mostly connected to PC via USB or Com port so they will signal PC to shut down gracefully and provide enough power for a minute or two for that to happen.
To properly work, VA (Volt Ampere) rating should be about twice that of your PSU.
But..... that may not help you with case of voltage drop when connecting large power users specially ones with motors, you'd be better served with an automatic voltage stabilizer, Only expensive UPS models provide that too.