what is processor core type
Older Pentium 4 models, which are available only in Socket 478, are identified by clock speed and sometimes a supplemental letter to indicate FSB speed and/or core type. For example, a Socket 478 Northwood-core Pentium 4 processor operating at a core speed of 2.8 GHz with the 400 MHz FSB is designated a Pentium 4/2.8.
As with the Xeon processor, most of the series has multiple cores and includes Intel's Hyper-threading to run up to two processes on each core. The chips have clocks from 1.2 GHz to 3.6 GHz, with the i7 processors having the fastest speeds.