I am putting along with my 500 mhz which was fast about a year and a half ago. My son is always upgrading his machine and tells me he is buying an intel 700mhz processer which is guaranteed to be overclockable to 900+ mhz for around $300. He had to buy a bigger fan and a new motherboard but I think he's going to be into it around $600. Wish I had a spare five or six hundred I'd have him do the same for me. But you can buy quite a few Harley accesories for that much : )