I have 400 watt PSU in my cpu..?

i have 2 HDD, keyboard, mouse, speakers, 2 sticks ram and crt monitor (i think that doesnt count) its 1gb++ ram...



i dont have graphic card...so if i want to add graphic card, do i need to change the power supply too??



im thinking about 256mb of dedicated graphic card..or maybe more...



and if all of you people know, is there any software that can tell us how much WATT our pc uses?? i know some hardware that can, but im looking for software...



thank you very much...I have 400 watt PSU in my cpu..?
You have enough watts in your PSU, so u don't need to change it. I would get at least a 512 mb graphic card with GDDR3 memory. And to answer your other question, no I don't know any program that calculates your wattage, sorry. Hope i helped.I have 400 watt PSU in my cpu..?
Here you go try this link, someone gave it to me and now i'll pass on the love.

http://www.corsair.com/psufinder/default

This is how I found the PSU for my pc build I will be making soon.

It will give you a variation of about a 100w or so just to be on the safe side.I have 400 watt PSU in my cpu..?
You might sneak by with that. I have.

Different CPUs processor MODELS can draw from 36W to 130W.

With such a range, there is no way to give a proper answer.