my mother-in-law has a Dell with a 2.8ghz p4. Since it has the p915 intel chipset, the fastest I can get it is a p4 661, 3.6ghz. I was wondering if it would even be worth doing for $90. It has 512mb in ram that is going to go to 2gb since ram is cheap. She won't be getting a new computer for 5+ years so I figure maxing it out the most I can will help it. Any suggestions as to upgrading the processor if it's worth it or not?