I am finding it very difficult to track down power supply requirements for many PCI graphics cards. Many cards do not list the power requirements. Some indicate a minimum power supply wattage, but don't indicate the amount of current necessary on the +12V line, which seems to be the critical number. I'm trying to figure out the best card available that will run on a 430W supply with an 18A max load on the +12V output. An 8600 GT card will run on this... anything better?