Following in the footsteps of Pentium 4-M and Mobile Celeron (Northwood-256) another announcement arrived about Intel changing the core stepping of its Xeon processors based on 0.13micron Prestonia core (it was changed from "B0" to "C1"). The changes are actually the same as by mobile processors: fewer capacitors on the processor die (they reduced their number from 15 to 12), new S-Spec (SL6E*), all bugs eliminated and the CPUID changed from 0F24h to 0F27h.

The test samples of the CPUs built on the new die will be available from July 15 until August 2. by August 30 the tests should be completed and by September 13 the company is going to start shipping these processors in mass quantities.