Well Ihad my old Acer Aspire 3680 siting in the closet for six months and finaly decided to play with it a little.
Its a Celeron M 520 on the stock air cooler, the only thing I had to do was bring the RAM timing up as it was unstable 1t 4-4-4-16. the new clocks are 4-6-6-20. The only thing I plan on using this old laptop for is Seti@home, or Primegrid@home of F@H(I cant decide lol).
Basicly its running at 1.9 Ghz from 1.6 GHz( I might try for 2.0Ghz if its stable
) ohh and I get nice temps .