KarbosGuide.com. Module 3e
Module 3e describes the development of 6th generation
CPU's. The module is subdivided into the following pages:
I recommend that you read all the pages one by one. Just
follow the links "Next page" to get through the textbook. I hope you
find the information useful!
Introduction to the 6th generation of CPUs
The first 6th generation CPU was Intel's Pentium Pro from 1995. However,
first from 1997 with both AMD's K6 and the Pentium II the 6th generation
performances have been available for us all.
A giant chip
No DOS with PPro
Pentium Pro versus Pentium II
The next module 3e
Pentium Pro was an important CPU, since it became the
father to the Pentium II, the Celeron, the Pentium III and made the ground
other P6-like processors as K6-2.
Pentium Pro development started in 1991, in Oregon. It
was introduced on November 1, 1995.
The Pentium Pro is a pure RISC processor, optimized for 32 bit processing
in Windows NT or OS/2. The new hot feature was that the L2 cache is built-in.
This is like two chips in one. The new features were:
Built in optimized L2 cache with 256 KB or 512 KB. This is connected to
the CPU itself with a 64 bit back side bus. Thus, the L2 cache runs synchronous
with the CPU speed.
Multiple branch prediction, where the CPU anticipates the next instruction.
Data Flow Analysis, which should reduce data dependence. Speculative Execution,
where the CPU attempts to anticipate instruction results.
5.5 million transistors in the CPU, 15 million for the 256 KB SRAM L2 cache.
(6 transistors per bit).
4 pipelines for simultaneous instruction execution.
RISC instructions with concurrent x86 CISC code to MicroOps RISC instructions
2.9 Volt 4 layer BiCMOS processor technology.
Patented protocol. Thus, other CPU manufacturers cannot use the Pentium
Pro Socket and chip set. This was not to the user's advantage.
A giant chip
Here you see a rectangular chip. The CPU and L2 cache are separate units
inside this chip:
It is mounted in a huge Socket 8:
Pentium Pro was not for DOS...
Pentium Pro was primarily optimized to 32 bit program execution. Often
you heard about its poor performance executing 16 bit programs. I used
a PPro 200 MHz (at 233 MHz) and experienced tremendous power in my Windows
95 environment. However the CPU was aimed at use in servers.
PPro versus Pentium II
After the introduction of Pentium II, the interest in the PPro has declined,
and by the end of 1998 it was out of production. However it sold awhile
after the introduction of the Pentium II.
Compared to the first generations of this one, the PPro had advantages
when used in certain servers:
L2 cache speed
Max. number CPU
Intel also supplied a Pentium Pro-Overdrive Kit running at 333 MHz.
However, with the Intel Xeon CPU the end came to the Pentium Pro.
Read about chip sets on the motherboard in module
Read more about RAM in module 2e
Read module 5a about expansion cards, where
we evaluate the I/O buses from the port side.
Read module 5b about AGP and module
5c about Firewire.
Read module 7a about monitors, and 7b
on graphics card.
Read module 7c about sound cards, and 7d
on digital sound and music.
Copyright (c) 1996-2005 by Michael B. Karbo. www.karbosguide.com.