Yes it is the mini tower, here's the old hardware.
It's a HUGE heat sink with a fan on the side. The fan is the big black shroud in the original picture, the heat sink itself doesn't have a built in fan. It sounds like a jet engine when it gets rev'd up. I'm looking for something more efficient and quieter.
Here's more info on the heat sink, its a two piece design with the heat sink and fan separate, I was hoping to find a smaller one piece unit with fan and heat sink combo.