My computer is a 1998 HP I still have tons of disk space and loads of memory but I think it only has 1 pentium and it is very slow!!! And I have cable instead of dial=up. Ok here is my question,do I need to buy a whole motherboard or can I just get a pentium chip? It also frezzes up all the time!And it drives me nuts!And how do I know which one to get? Can anybody help?