the dell is a bit more at 100% working order all that needs really is a aftermarket video card
dell = 2.4ghz
HP = 2.2 ghz
as for heat was gonna go to radio shack and get 3 120mm fans ,grab a small piece of wood and make a cooling rack of sorts
plus Ive been on this idea to use my window near hear some how to pull in winter air using some type of "poorman" duct work for ice cold cooling although im sure i would need to figure something out since condensation and water build up might be a prob
then comes a GOOD router
finally.