Help wih UPS

[nimrod21]

Can you help me with something?

I need to buy a UPS, as in the city where I live occur many power outages. I will only use it to connect my computer.

How many VA need to have UPS, if my source has 500W?

Example of UPS -http://cdn1.bigcommerce.com/server4700/2a00b/product_images/uploaded_images/ups-power-supply-recycling.jpg

 

[thx1138v2]

You typically convert Watts to VA by dividing the Watts by 0.8. That yields 625VA for 500 Watts but you want some overhead in your UPS so the 750VA at your link should work OK. Remember that the 500W rating on your PSU is a maximum rating and you probably are not using all of that.