Although much of the focus in recent weeks has been on upcoming chips based on the next-generation Nehalem microarchitecture, Intel isn't yet finished advancing its 45nm processors, as witnessed by today's introduction of a new revision of its dual-socket Xeon server/workstation-class CPUs. This new E-stepping silicon brings a bit of a clock frequency increase and some minor reductions in power draw to the Harpertown Xeons.