i am upgrading to a Evga 680i and a SINGLE 8800gt(specs in sig) i have a 580watt PSU at the moment...however i was reading that it would take 36Amps for 8800gt SLI...that would mean buying a $200 PSU... is this true or would something like this work:http://www.zipzoomfly.com/jsp/ProductDetail.jsp?ProductCode=273512&prodlist=bizrate