I'm just wondering do cpu Heatsinks 'expire'? like do they become less effective say after 6-7yrs of hard use, like the pc being on approx 16hrs + a day each day?. because I have a Arctic Cooling Freezer 7 Pro first rev and I'm sure I use to get lower tempts then 55'C for a Q6600 core 2 quad?
I say 'expire' because the heat pipes have refrigerant in it which could have leaked out over time or through cracks