1.4 Microprocessor
The P6F94 mainboard is designed to operate with the Intel Pentium II
processor that runs at 233, 266, 300, 333MHz and Intel Celeron at
266, 300MHz. On board switching voltage regulator provides the
required 1.8 to 3.5 volts for the processor. The Pentium II or Celeron
processor will send 5 VID (Voltage Identification) signals to the
switching voltage regulator, and the switching regulator will generate
the correct voltage for the processor.
The Pentium II or Celeron processor implements MMX technology
and maintains full backward compatibility with the 486 and Pentium
processors. The processor’s numeric coprocessor significantly
increases the speed of floating-point operations.
1.5 Pentium II Packaging
The Pentium II is packaged in an S.E.C. (Single-edge Contact)
cartridge. The S.E.C. cartridge includes the processor core, the second-
level cache, a thermal plate, and a back cover. The Pentium II
processor connects to the P6F94 mainboard through the Slot 1
processor connector, a 242-pin edge connector. When the Pentium II
is installed in Slot 1, it is secured by a retention mechanism attached to
the mainboard. The Pentium II heatsink is stabilized by a heatsink
support, which is attached to the mainboard.
1.6 Celeron Packaging
The Celeron is packaged in an S.E.P.P. (Single Edge Processor
Package), which is similar to the Single Edge Contact (SEC)
cartridge form factor that the Pentium II processor uses, and
maintains compatibility with Slot 1. This packaging technology
features a P6-microarchitecture-based core processor on a single-
sided substrate without BSRAM componentry. It does not have a
thermal plate or cover. The 0.25 micron manufacturing process,
which reduces processor heat, enables the Intel Celeron processor to
use a smaller heat sink. Also, the Intel Celeron processor uses newer
Retention Mechanisms that are designed to fit the SEPP form factor.
P6F94 User’s Manual 11
Chapter 1: Introduction
