Why are people getting so stressed about it?
if its on properly,
a stock heatsink will keep the processor at an acceptable temperature for a time period exceeding the warantee.
providing acceptable minimum cooling.
it does its job at a specified core frequency & voltage
u really only need a specialised cooler IF:
1. you like extra noise
2. your computer is expected to be continually running in excessive temeratures
3. you plan to overclock
4. the computer is running critical apps and u want less risk of overheating due to ambient temps or a failing stock cooler.
5. you plan to keep the computer for a really long time
6. you want to brag that your volcano Mk IX with solid gold heatsink & 15000rpm fan screams like a banshee and causes your bowels to resonate.
My Hamster has 512MB of SDRAM @ 150Mhz CAS 2!