Intel atom mobile processor with the clock frequency 1.6GHz is the most popular processor . Intel atom with 1.86GHz frequency is a little faster than its junior brother, but in this case it is noticeably more expensive.
Now the price of z530 processor, Atom 1.6 GHz with 512Kb cache , FSB 533MHz and 45nm technical process, is equal to $65, while the processor n270 with identical characteristics is sold for $44, and it is completely popular among notebook producers .
The newer model z540, Atom 1.86GHz with 512Kb cache and FSB 533MHz cost $135 .This processor does not have a great demand.