I'm installing a P4 3.0 and I have a question...is the grey rubber-like padding on the bottom of the retail heatsink/fan some sort of thermal compound? I installed the processor and had no results booting (no video or anything) and I removed the processor/hsf and the grey bit came off....is it necessary or could it be removed...perhaps replaced with thermal paste? I hope someone knows what I'm talknig about.