How can you calculate out your PSU requirements?

Well im wondering what PSU to get for my new system ill be building soon.

1.6a pent (hopefully past 2.2)
p4s533 mobo
256-348 pc2700 DDR
2 40 gig 7200 ata 133 maxtor quiet hard drives
1 cdr
1-2 cd dvd players
gf4 ti 4200 (hopefully at ti 4600 speeds
1 generic nic and a sound card

What would be great is if someone knows of howto calculate out the watt requirements and could tell me, though if you coule give me a general watt requirment that i can shoot for that would be good as well

I wouldn't go lower than a 400W, Check out Sparkle Powersupplies, they rock, about 2/3rds of the cost of a same watt emermax and they are built tough, i have never had a problem with them, and i put them in every rig i build.


A psu is the heart of your system, you don't want to skimp here.

Try useing the SEARCH engine that is here!
http://www.pcpowerandcooling.com/maxpc/index_cases.htm

Sweet dude, thanks!