If that is a top quality 400W power supply (which i don't think it is) then the computer would probably be fine. If it is one of those cheap $10-$15 400W power supplies then I think that PC will crash and burn very quickly.
EDIT: If you are looking for a new PC, build it yourself. You can build that exact same PC for probably a few hundred dollars cheaper and even throw in a better video card. If you are definitely not going to build, i suppose you could get that and maybe upgrade the power supply.
Message edited by helios2052 on 08-04-2008 at 07:08:56 PM
If you don't want to build go ahead and buy it. Hopefully gateway uses standard power connectors so that the psu can be changed if it gives you problems.
You are about to answer a thread that has been inactive for more than 6 months. If you still wish to proceed, please ensure that your posting is original and does not duplicate or overlap any prior responses to this thread.