Recently my home desktop computer has been reacting a lot more to heat levels. The fan starts maxing out just about any time the CPU is used, and it's very loud. It didn't use to do this - only in the last year or so (it's about 3 or 4 years old). I've removed all the dust I can find, but Speedfan shows it's running at about 130 degrees, and when it goes a tick above that the fan goes crazy.
Any ideas? Can the heat sink fail over time? Do I need to get better/quieter fans?
I'm not looking to put a lot of money into this system, so I'm hoping for any low cost ideas.