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Cyrix M II

Cyrix M II-233GP, 66 MHz Bus, Dark

Cyrix M II-266GP, 66 MHz Bus

Cyrix M II-300GP, 66 MHz Bus

Cyrix M II-300GP, 66 MHz Bus, Dark

Cyrix M II-300GP, 75 MHz Bus

Cyrix M II-333GP, 66 MHz Bus, Silver

Cyrix M II-333GP, 75 MHz Bus

Cyrix M II-333GP, 83 MHz Bus, Engineering Sample

Cyrix M II-366GP, 100 MHz Bus

Cyrix M II-400GP, 95 MHz Bus

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The Cyrix MII Processor

After Cyrix was purchased by National Semiconductor in 1997 they terminated their foundry agreement with IBM. National fabricated their own chips and the 6x86MX was re-named MII. Compared to early 6x86MX CPUs the MII had some enhancements to its processor core. Heat output was reduced allowing it to rise to clock speeds over 220MHz. The MII also required non-standard bus speeds at 75 or 83MHz on socket 7 boards and therefore had some troubles with stability.

Reference: Cyrix M2 Processor FAQ

Cyrix M II-233GP, 66 MHz Bus, Dark


M II-233GP 66Mhz Bus 3.x 2.9V FAN/HEATSINK REQUIRED (C)(M) 1995-1997 CYRIX 3LGEM847XH	CORP. CYRIX 1995-1998 USA

Made by National Semiconductor

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Core Frequency:	200 MHz
Board Frequency:	66 MHz
Clock Multiplier:	3.0
Data bus (ext.):	64 Bit
Address bus:	32 Bit
Transistors:	6,500,000
Circuit Size:	0.35 µ
Core / I/O Voltage:	2.9 / 3.3 V
Introduced:	1997
Manufactured:	week 47/1998
Made in:	USA
L1 Cache:	64 KB
CPU Code:	6x68 M2
Package Type:	Ceramic PGA-296
Socket:	7

Cyrix M II-266GP, 66 MHz Bus


M II-266GP 66MHZ BUS 3X 2.9V FAN/HEATSINK REQUIRED	(c)(M)1995-1997 CYRIX V1SH2851AG

Made by National Semiconductor

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Core Frequency:	200 MHz
Board Frequency:	66 MHz
Clock Multiplier:	3.0
Data bus (ext.):	64 Bit
Address bus:	32 Bit
Transistors:	6,500,000
Circuit Size:	0.35 µ
Core / I/O Voltage:	2.9 / 3.3 V
Introduced:	1998
Manufactured:	week 51/1998
Made in:	USA
L1 Cache:	64 KB
CPU Code:	6x68 M2
Package Type:	Ceramic PGA-296 Goldcap
Socket:	7

Cyrix M II-300GP, 66 MHz Bus


M II-300GP 66MHz Bus 3.5x 2.9V FAN/HEATSINK REQUIRED	COPYRIGHT USA (c)(M)1995-1997 CYRIX USA GKKCM820D CANADA

Made by IBM

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Core Frequency:	231 MHz
Board Frequency:	66 MHz
Clock Multiplier:	3.5
Data bus (ext.):	64 Bit
Address bus:	32 Bit
Transistors:	6,500,000
Circuit Size:	0.35 µ
Core / I/O Voltage:	2.9 / 3.3 V
Introduced:	1998
Manufactured:	week 20/1998
Made in:	Canada
L1 Cache:	64 KB
CPU Code:	6x68 M2
Package Type:	Ceramic PGA-296 Goldcap
Socket:	7

Cyrix M II-300GP, 66 MHz Bus, Dark


M II-300GP 66MHz Bus 3.5x 2.9V FAN/HEATSINK REQUIRED (C)(M) 1995-1997 CYRIX 3LGEM906XA

Made by National Semiconductor

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Core Frequency:	231 MHz
Board Frequency:	66 MHz
Clock Multiplier:	3.5
Data bus (ext.):	64 Bit
Address bus:	32 Bit
Transistors:	6,500,000
Circuit Size:	0.35 µ
Core / I/O Voltage:	2.9 / 3.3 V
Introduced:	1998
Manufactured:	week 06/1999
L1 Cache:	64 KB
CPU Code:	6x68 M2
Package Type:	Ceramic PGA-296
Socket:	7

Cyrix M II-300GP, 75 MHz Bus


M II-300GP 75MHZ BUS 3X 2.9V FAN/HEATSINK REQUIRED	COPYRIGHT USA (C)(M)1995-1997 CYRIX USA 3MSCM833AR

Made by National Semiconductor

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Core Frequency:	225 MHz
Board Frequency:	75 MHz
Clock Multiplier:	3.0
Data bus (ext.):	64 Bit
Address bus:	32 Bit
Transistors:	6,500,000
Circuit Size:	0.35 µ
Core / I/O Voltage:	2.9 / 3.3 V
Introduced:	1998
Manufactured:	week 33/1998
Made in:	USA
L1 Cache:	64 KB
CPU Code:	6x68 M2
Package Type:	Ceramic PGA-296 Goldcap
Socket:	7

Cyrix M II-333GP, 66 MHz Bus, Silver


M II-333GP 66MHZ BUS 4X 2.2V FAN/HEATSINK REQUIRED 45L9308 U150095N	CORP. CYRIX 1995-1998

Core Frequency:	264 MHz
Board Frequency:	66 MHz
Clock Multiplier:	4.0
Data bus (ext.):	64 Bit
Address bus:	32 Bit
Transistors:	6,500,000
Circuit Size:	0.35 µ
Voltage:	2.2 V
Introduced:	1998
Manufactured:	week 30/1998
L1 Cache:	64 KB
CPU Code:	6x68 M2
Package Type:	Ceramic PGA-296
Socket:	7

Cyrix M II-333GP, 75 MHz Bus


M II-333GP 75MHZ BUS 3.5X 2.9V FAN/HEATSINK REQUIRED	(C)(M)1995-1998 CYRIX V2SP8912AB

Made by National Semiconductor

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Core Frequency:	265 MHz
Board Frequency:	75 MHz
Clock Multiplier:	3.5
Data bus (ext.):	64 Bit
Address bus:	32 Bit
Transistors:	6,500,000
Circuit Size:	0.35 µ
Core / I/O Voltage:	2.9 / 3.3 V
Introduced:	1998
Manufactured:	week 12/1999
Made in:	USA
L1 Cache:	64 KB
CPU Code:	6x68 M2
Package Type:	Ceramic PGA-296 Goldcap
Socket:	7

Cyrix M II-333GP, 83 MHz Bus, Engineering Sample


M II-333GP 83Mhz Bus 3.x 2.9V ES FAN/HEATSINK REQUIRED	COPYRIGHT USA (C)(M)1995-1997 CYRIX USA GMKDM826H CANADA

Made by IBM

» other pre-production sample chips

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Core Frequency:	250 MHz
Board Frequency:	83 MHz
Clock Multiplier:	3.0
Data bus (ext.):	64 Bit
Address bus:	32 Bit
Transistors:	6,500,000
Circuit Size:	0.35 µ
Core / I/O Voltage:	2.9 / 3.3 V
Introduced:	1997
Manufactured:	week 26/1998
Made in:	Canada
L1 Cache:	64 KB
CPU Code:	6x68 M2
Package Type:	Ceramic PGA-296
Socket:	7

Cyrix M II-366GP, 100 MHz Bus


M II-366GP 100MHZ BUS 2.5X 2.9V 28A6-13 FAN/HEATSINK REQUIRED	(C)(M)1995-1998 CYRIX V7SPC919AL

Made by National Semiconductor

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Core Frequency:	250 MHz
Board Frequency:	100 MHz
Clock Multiplier:	2.5
Data bus (ext.):	64 Bit
Address bus:	32 Bit
Transistors:	6,500,000
Circuit Size:	0.35 µ
Core / I/O Voltage:	2.9 / 3.3 V
Introduced:	1997
Manufactured:	week 19/1999
L1 Cache:	64 KB
CPU Code:	6x68 M2
Package Type:	Ceramic PGA-296
Socket:	7

Cyrix M II-400GP, 95 MHz Bus


M II-400GP 95MHZ BUS 3.0X 2.2V M2400D095-22 FAN/HEATSINK REQUIRED	(C)(M)1995-1998 CYRIX VBSDD923AN

Made by National Semiconductor

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Core Frequency:	385 MHz
Board Frequency:	95 MHz
Clock Multiplier:	3.0
Data bus (ext.):	64 Bit
Address bus:	32 Bit
Transistors:	6,500,000
Circuit Size:	0.35 µ
Voltage:	2.2 V
Introduced:	1998
Manufactured:	week 23/1999
Made in:	USA
L1 Cache:	64 KB
CPU Code:	6x68 M2
Package Type:	Ceramic PGA-296 Goldcap
Socket:	7

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