1.33 ghz IMO would be enough..laptops aren't made to be pushed like a desktop but the Powerbook is the ideal laptop if your looking to do strong activity on a laptop..my iBook isn't really made for that..Apple pretty much explains it all by the names of their machines (iBook portable,iMac desktop. Home machines for the family: Powerbook portable, Powermac desktop)Machines used for more powerful, time consuming programs.Used more for actual purpose than surfing the web, chatting etc.)