Originally posted by: Demoth
By the way, Dell not only recommends an additional propriatory blower fan be installed in the 8400 if a vid card with a draw of more then <75 watts is installed, but according to posts, you'll get an error message everytime you boot which can be bypassed by pressing F1. The reason for this is because the computer has no airflow inside and Dell is covering themselves from people buring up their vid cards. You may want to add a cheap slot cooler.
Because the 8400 had the option to ship with a X800XT and numerous people are reporting running 7900GTs on the stock 350 watt PSU, I am assuming it must have the PCI Express connector, but I can not find any documentation stating whether this is true.