Atom Z5xx series of chips were, in flavors ranging from 1.1 to 1.86GHz, and how they only needed a miserly 2.2 watts or less of power. They weren't good enough, apparently, as there are two new members now joining the ranks. First is the Z550, featuring a clock speed of 2GHz while still using less than 2.4 watts. Also new is the more frugal Z515, with a dynamic clock speed ranging between 800MHz and 1.33GHz to suit you whether you're playing Solitaire or watching Survivor re-runs. These chips too seem destined for mobile phones and MIDs, but we wouldn't be surprised if Sony releases a (slightly) speedier VAIO P packing a Z550 -- and then refuses to import it to the States.