The new lineup consists of three part numbers:
Core i7-2677M: dual cores running at 1.8 GHz (peaking to 2.9GHz), 4MB cache, listing for $317
Core i7-2637M: dual cores running at 1.7GHz (peaking to 2.8GHz), 4MB cache, listing for $289
Core i5-2557M: dual cores running at 1.7GHz (peaking to 2.7GHz), 3MB cache, listing for $250