Other reviews show around 380W with the full system. The silverstone is a good supply, but unfortunately its only rated 410W on the 12 volt rail. However you should be below that, and it can deliver over the specs a bit. hardware secrets got 480W out of it before it safely shutdown. If you're not overclocking and only have one or two harddrives I wouldn't be concerned about trying to use it. it will either work or it wont.