Virtually all the essential details for Intel's first mobile chips based on the Nehalem architecture have escaped today courtesy of a roadmap. It now says the quad-core Clarksfield processors at 1.6GHz, 1.73GHz and 2GHz will be named the i7-720QM, i7-820QM and i7-920XM respectively with 8MB of cache on all but the slowest model. In a surprise, however, all three will also have dramatic headroom
