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Intel Pentium Pro

Intel Pentium Pro KB80521EX150, 150 MHz, 256 KB Cache

Intel Pentium Pro KB80521EX166, 166 MHz, 512 KB Cache

Intel Pentium Pro KB80521EX180, 180 MHz, 256 KB Cache

Intel Pentium Pro KB80521EX200, 200 MHz, 256 KB Cache

Intel Pentium Pro KB80521EX200, 200 MHz, 512 KB Cache

Intel Pentium Pro GJ80521EX200, 200 MHz, 1MB Cache

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The Intel Pentium Pro Processor

The Pentium Pro is a sixth-generation x86 architecture microprocessor by Intel originally intended to replace the original Pentium in a full range of applications, but later reduced to a more narrow role as a server and high-end desktop chip. It was introduced using an enormous rectangular Socket 8 form factor in November 1995. Intel has since discontinued it in favor of the newer high-end Xeon processor lines.

Despite the name, the Pentium Pro is actually quite different from Intel's earlier Pentium processor, being based on the then-new P6 core (which in a modified form would later be used for the Pentium II, Pentium III and Pentium M). The P6 core features out-of-order execution, speculative execution, and an additional pipe for simple instructions.

Intel Pentium Pro KB80521EX150, 150 MHz, 256 KB Cache


	KB80521EX150 SY010 256K L6011634-0457 INTEL (m) (c) '94 '95
	25410770AA A5423753AB MALAY AA KB80521EX150 SY010 256K

Comment by MoonKnight (moonknightus[at]yahoo.com):

The Pentium Pro was only a partial success for Intel. While it excelled in the server market, it failed as a desktop platform. This was for two reasons:
(1) At the time of its introduction, most users ran 16-bit code and the P-Pro couldn't even keep up with the previous generation (Pentium) chips in this area.
And (2) the Pentium Pro was excessively expensive. This was partially due to the fact that the L2 Cache had to be wired into the CPU package before either the CPU or the Cache could be tested. If one failed, they both had to be thrown away regardless of whether the other was good or not. Fortunately for Intel, the P-Pro core went on to success in the original Celerons, the Pentium II and the Pentium III.

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Core Frequency:	150 MHz
Board Frequency:	60 MHz
Clock Multiplier:	2.5
Data bus (ext.):	64 Bit
Address bus:	36 Bit
Transistors:	21,000,000
Circuit Size:	0.25 µ
Voltage:	3.3 V
Introduced:	Nov. 1, 1995
Manufactured:	week 01/1996
Made in:	Malaysia
L1 Cache:	8+8 KB
L2 Cache:	256 KB
CPU Code:	P6
Intel S-Spec:	SY010
Package Type:	Ceramic SPGA-387
Socket:	8

Intel Pentium Pro KB80521EX166, 166 MHz, 512 KB Cache


	KB80521EX166 SY047 512K L6433749-0105 INTEL (m) (c) '94 '95
	16252190AD MALAY KB80521EX166 SY047 512K

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Core Frequency:	166 MHz
Board Frequency:	66 MHz
Clock Multiplier:	2.5
Data bus (ext.):	64 Bit
Address bus:	36 Bit
Transistors:	36,500,000
Circuit Size:	0.25 µ
Voltage:	3.3 V
Introduced:	Nov. 1, 1995
Manufactured:	week 63/1996
Made in:	Malaysia
L1 Cache:	8+8 KB
L2 Cache:	512 KB
CPU Code:	P6
Intel S-Spec:	SY047
Package Type:	Ceramic SPGA-387
Socket:	8

Intel Pentium Pro KB80521EX180, 180 MHz, 256 KB Cache


	KB80521EX180 SL22U 256K ICOMPÂ® 2 #=197 L7041671-0312 INTEL (m) (c) '94 '96
	E6451296AD MALAY KB80521EX180 SL22U 256K

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Core Frequency:	180 MHz
Board Frequency:	60 MHz
Clock Multiplier:	3.0
Data bus (ext.):	64 Bit
Address bus:	36 Bit
Transistors:	21,000,000
Circuit Size:	0.25 µ
Voltage:	3.3 V
Introduced:	Nov. 1, 1995
Manufactured:	week 04/1997
Made in:	Malaysia
L1 Cache:	8+8 KB
L2 Cache:	256 KB
CPU Code:	P6
Intel S-Spec:	SL22U
Package Type:	Ceramic SPGA-387
Socket:	8

Intel Pentium Pro KB80521EX200, 200 MHz, 256 KB Cache


	KB80521EX200 SL22T 256K ICOMP(R) 2 #=220 L7303921-0190 INTEL (m) (c) '94 '96
	17153730AD MALAY KB80521EX200 SL22T 256K

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Core Frequency:	200 MHz
Board Frequency:	66 MHz
Clock Multiplier:	3.0
Data bus (ext.):	64 Bit
Address bus:	36 Bit
Transistors:	21,000,000
Circuit Size:	0.25 µ
Voltage:	3.3 V
Introduced:	Nov. 1, 1995
Manufactured:	week 30/1997
Made in:	Malaysia
L1 Cache:	8+8 KB
L2 Cache:	256 KB
CPU Code:	P6
Intel S-Spec:	SL22T
Package Type:	Ceramic SPGA-387
Socket:	8

Intel Pentium Pro KB80521EX200, 200 MHz, 512 KB Cache


	KB80521EX200 SL22Z 512K L7493010-0100 INTEL (m) (c) '94 '96
	17180490AD MALAY KB80521EX200 SL22Z 512K

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Core Frequency:	200 MHz
Board Frequency:	66 MHz
Clock Multiplier:	3.0
Data bus (ext.):	64 Bit
Address bus:	36 Bit
Transistors:	36,500,000
Circuit Size:	0.25 µ
Voltage:	3.3 V
Introduced:	Nov. 1, 1995
Manufactured:	week 49/1997
Made in:	Malaysia
L1 Cache:	8+8 KB
L2 Cache:	512 KB
CPU Code:	P6
Intel S-Spec:	SL22Z
Package Type:	Ceramic SPGA-387
Socket:	8

Intel Pentium Pro GJ80521EX200, 200 MHz, 1MB Cache


	GJ80521EX200 SL25A 1M L8034131-0443 INTEL (m) (c) '94 '96
	17176010PB 17351680PB 803 PHILIPPINES

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Core Frequency:	200 MHz
Board Frequency:	66 MHz
Clock Multiplier:	3.0
Data bus (ext.):	64 Bit
Address bus:	36 Bit
Transistors:	67,500,000
Circuit Size:	0.25 µ
Voltage:	3.3 V
Introduced:	January 1996
Manufactured:	week 03/1998
Made in:	Philippines
L1 Cache:	8+8 KB
L2 Cache:	1 MB
CPU Code:	P6
Intel S-Spec:	SL25A
Package Type:	Plastic/ Aluminum SPGA-387
Socket:	8