Intel Atom N550 N570 comes with a replacement. While the N550 is 1.5 GHz clock, the N570 will run at 1.66 GHz. maximum TDP (thermal design power) both for Intel chips with 8.5 watts.
Both have two cores, 1 MB L2 cache (512 KB per core) and support for DDR3 memory running at 667 MHz.