Dell :: Vostro 1310 Fan Noise

I recently purcahsed a vostro 1310 laptop. It's been absolutely great, except for one thing: the fan is incredibly annoying.

Once the processor reaches 45 degrees celsius, the fan kicks in, lowers it to 40, and then turns off. A few minutes later, the computer will go up to 45, and the fan will kick in again; so it goes through this loop of turning on and off, which is incredibly annoying.

Doing some more research, I've found that other people have also had this 'problem'. Undervolting and switching to powersaving mode solved the problem a bit, but once it hits 45, I still have the same problem.