Can you recommend a good UPS for a gaming PC?

The power in my neighborhood keeps going out. Eletropaulo technicians are always coming here to fix it, but it doesn’t take long before it goes out again.

I invested a lot of money in my PC. Just my video card cost more than 5,000 reais.

The technician here on my street recommended that I invest in a UPS.

But I don’t know anything about that. I have many peripherals here and I’d like to know what voltage I need to buy.

I think my power supply is 850W.

If possible, I’d like to keep it on for at least about 20 minutes after a power outage, so I have time to at least save what I’m doing. I don’t need anything that lasts a long time.

And what’s the difference between a UPS and a voltage regulator? I need a UPS, right?