How many watts will my system consume?

[faultfinder]

Hello, here's my system configuration:
http://valid.canardpc.com/show_oc.php?id=543443

I want to exchange my ati radeon x300 with asus en9400gt with 1gb of video memory
How many watts will my new system consume?

 

[GhislainG]

You can use http://www.antec.outervision.com/