Will this PSU work with a 7900GTO?

[DuffMan72]

I'm using a 400 watt forton PSU with dual 18A +12v rails. It currently runs my 7900GT OC 256 without problems, but I want to return it to get the GTO.

Edit: Here's the link to it. http://www.ncix.com/products/index.php?sku=17076&vpn=ATX-400-PN-B&manufacture=Fortron Source