The dell continuously over heats and make a louder then normal noise when the fan operates. After some research i found that many people replace the heatsink and/or replace the thermal compound. The replacement heatsink that i have is from dell so essentially the same as before. The thermal compound is the Best Buy brand so im sure which would be the best option.
I would go with the heatsink if I were you, thermal compound uses lowers temperature by 2-10 degrees (10 degrees with only the best thermal pastes and proper application), a different heatsink on the other hand would allow you to drop possibly 10-25 degrees based on the type you buy.