Don't buy the ATX PS, buy ONLY AT Power Supply!!!
Maybe you'll be more specific, did you come from another website in Russian stating NOT to post this?
How much power does your PC use?
- Laptop?
- LCD or CRT?
How long must it stay on when the mains fail?
- Just long enough to shut down gracefully
- All day
- Will you need to use the PC while on ups?
What are the choices in your market? Where are you going to be shopping?
Don't buy the ATX PS, buy ONLY AT Power Supply!!!
Maybe you'll be more specific, did you come from another website in Russian stating NOT to post this?
You are confused! The poster is inquiring about an Uninterpretable Power Supply not an internal PSU for his computer.
itsarun:
Follow mneary's guidelines on determining your needs. Also remember that the battery(ies) may need replaced someday and they can be a bit pricey depending upon their specs. Add all the rated wattage figures for each device (should be labeled somewhere on each device) that you want to have back-up power for. Now add 20% of that sub-total to know the practical amount of total wattage your UPS should be rated for. A margin of 30-40% is even better should you decide to upgrade a component or two in the future that may require more power.