I need more power than a 450Watt ATX PSU?!?!
I would hope not. Unless you have some Voodoo card in there too. I think you just need to make sure it has at least 7 amp on the +5...
You may also want to check the PS with a meter and make sure the 5v is 5v and the 12v is 12v. I don't know the margin of error, but the 5v should not be off much...
