Which Is Better Heatsink Thermal Silicone Pad Or Greese

which is better Heatsink Cooling Thermal Conductive Silicone Pad or the greese? I just got a athlon 2 quad 4 620 2.6ghz proc used off ebay and I used the standard greese but it runs a little too hot so thinking I put too much on I reapplied with less still running at idle lowest is about 130f and reaches 142 then my fan kick in at high speed (stock fan very loud) for about 2min till it comes down to 130f then returns to normal

Im using the stock heatsink and fan that came with my hp with a amd athlon 2 215 duel core and looks identical as the stock on that come with the athon 2 quad

(ie) it looks like the one in this link http://www.ebay.com/itm/AMD-Heat-Si…

I was told to get one thats for my quad but dont want to wast money if Ill just be getting the same one. Is their a diff in the one for the duel core vs quad core but look the same or do I most likely have one thats made for the quad? ‘

Returning to my original question since Im running hot would I get better cooling if I use the pad? If yes are their one you reccomend since I assume they have diff heat transfer rates and then just invest in a better fan rather than both? I have the 3 pin which one would give me better cooling and alot less noise vs the stock one that sound like a small aircraft is taking off in my comp.

Ive had the procc in and have had the comp running for two days to while ive been watching the temp it has never gone above 145f but it never runs below 128f since thats close to the 71c max temp listied for this proc but I am unshure if this is considered acceptabe or not and before you respond with “did you clean the heatsink or did you use new greese and the correct amount or did the heat sink have dust on it, who would leave dust all over the heatsink or use old greese or none at all lets assume that I have half a brain and half more experience than your average cp users (even though its self tought knowlege) its quality self tought knowlage!!??