The Pentium II can execute all the instructions of all the
earlier members of the
Intel 80x86 processor family. There
are four versions targetted at different user markets. The
Celeron is the simplest and cheapest. The standard Pentium
II is aimed at mainstream home and business users. The
servers. There is also a mobile version of the Pentium II
for use in portable computers.
All versions of the Pentium II are packaged on a special
the
motherboard. The daughterboard is enclosed within a
cartridge. The budget
Celeron may be sold as a card only
without the box. Consumer line Pentium II's require a 242-pin
slot called
Slot 1. The
Xeon uses a 330-pin slot called
Slot 2. Intel refers to Slot 1 and Slot 2 as SEC-242 and
SEC-330 in some of their technical documentation. The
daughterboard has mounting points for the Pentium II
CPUitself plus various support chips and
cache memory chips.
All components on the daughterboard are normally permanently
soldered in place. Previous generation
Socket 7motherboards cannot normally be upgraded to accept the Pentium
II, so it is necessary to install a new motherboard.
and integrated Level One and Level Two cache controllers.
Independent Bus Architecture, with separate 64 bit system and
cache busses. Pentium II is a
superscalar CPU having about
The first Pentium II's produced were code named
Klamath.
They were manufactured using a 0.35 micron process and
bus speed of 66 MHz. Second generation Pentium II's, code
named Deschutes, are made with a 0.25 micron process and
support rates of 350, 400 and 450 MHz at a bus speed of 100
MHz.
(1998-10-06)