I have a 5 year old Gateway M-6843 that is running on an Intel Core 2 Duo T5750 (5 years old). I was wondering if it is worthwhile to upgrade to a Intel Core 2 Duo T7800. Also, if it does not increase speed enough to notice, what can I do to make my computer faster? Or is this the speed it will have till it completely goes down? I also was wondering if changing my Seagate 500 GB 5400 RPM hard drive would increase speed. This is my backup computer, but if I can make it faster it would be nice! Thanks!