Hi, been browsing forums for about 2 months now, and was finally able to register, so hello!! 
First off I would just like to ask the REAL advantages of thermal paste/compound, whatever. Currently I am using an Arctic Silencer64 on my Venice 3200+ and the thermal grease I am using is the stuff that came with the heatsink. Now, currently (in my nice warm bedroom) the CPU is idling at around 31-33 degrees this is with the silencer set to run on Cool n Quiet.
My question is, would I see any real temp drop if I cleaned off the freebie muck and bought and applied some arctic silver??
thanks.

First off I would just like to ask the REAL advantages of thermal paste/compound, whatever. Currently I am using an Arctic Silencer64 on my Venice 3200+ and the thermal grease I am using is the stuff that came with the heatsink. Now, currently (in my nice warm bedroom) the CPU is idling at around 31-33 degrees this is with the silencer set to run on Cool n Quiet.
My question is, would I see any real temp drop if I cleaned off the freebie muck and bought and applied some arctic silver??
thanks.

It does leave a slight residue which you have to wipe off, but it attacks the dried on stuff better than straight spirit does! (It's the only stuff I've used to get heatsinks/ramsinks that are 'glued' on by the adhesive pastes, quick squirt, leave, and remove - works a charm!)
Had it now for almost 2 years and has not run out - reapply every 6-months on 2 PCs.