Back in 1998 I would have loved to have one of these but I didn't have $1,500 to spare. Now I see I buy these anywhere for under $150. I have seen deals as low as $109. I am generally a person who buys in every time I can double my CPU clock speed for about $100. I am running a 400 mhz Celeron and my question is What benefit would I see from this CPU and what additional costs are involved? Will I need a new motherboard? My current motherboard has a slot 1. If I need a new motherboard which board should I look for and why? What else will I need?