does branded psu got voltage regulator?

Solution
In some places, the power infrastructure is best described as a chaotic web of whatever size and quality cabling run haphazardly to where it needs to go. While it worked just fine to keep incandescent bulbs burning and some analog appliances, it's murder on digital equipment. The local and regional governments have pocket lint and dreams for funding infrastructure upgrades, and force the population to take matters in their own hands instead.

Other area do have organized infrastructure, but lack sufficient power generation to meet demand, often causing brown-outs and blackouts. California had the same issue in the late 80's, so it's not limited to undeveloped/underdeveloped/developing countries.
Every PSU has a voltage regulator on the output side - it would pretty rapidly destroy your computer without it. Good quality PSUs are better at regulating, of course...

I don't understand why everyone in India seems to be so nuts about AVRs. They waste huge amounts of power, destroy your power factor, and don't really do much if your gear is anywhere near decent. Only thing that really needs them is a fridge.

A UPS is a good idea if you have frequent power cuts, or you may lose data and get corruption.
 

Saberus

Distinguished
In some places, the power infrastructure is best described as a chaotic web of whatever size and quality cabling run haphazardly to where it needs to go. While it worked just fine to keep incandescent bulbs burning and some analog appliances, it's murder on digital equipment. The local and regional governments have pocket lint and dreams for funding infrastructure upgrades, and force the population to take matters in their own hands instead.

Other area do have organized infrastructure, but lack sufficient power generation to meet demand, often causing brown-outs and blackouts. California had the same issue in the late 80's, so it's not limited to undeveloped/underdeveloped/developing countries.
 
Solution