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Cyrix 6x86MX
  Cyrix 6x86MX-PR166
  Cyrix 6x86MX-PR200, 75 MHz Bus
  Cyrix 6x86MX-PR200, 66 MHz Bus
  Cyrix 6x86MX-PR233
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The Cyrix 6x86MX Processor
The successor to the 6x86 and 6x86L is the 6x86MX (M2), introduced May 30, 1997 and intended to compete with AMD's K6 and Intel's Pentium MMX. The 6x86MX is an evolutionary step from the 6x86 and is very similar to it in internal function. The 6x86MX supports the MMX extension and also features several other improvements over the original 6x86 chip. The internal cache was increased from 16 to 64 KB, a 256 byte additional pre-cache was added to help improve efficiency in how the regular level 1 cache is operated, the Branch Prediction was improved and the internals of the chip have been optimized for 32-bit operation.
 
References:  Cyrix 6x86 Processor FAQ  Cyrix Press Releases  Cyrix 6x86MX Press Tour
Cyrix 6x86MX-PR166
Cyrix 6x86MX-PR166 Top Side
Cyrix
6x86MX-PR166
66MHz Bus 2.0x
2.9V
FAN/HEATSINK REQUIRED
Cyrix 6x86MX-PR166 Back Side
COPYRIGHT USA
(c)(M)1995-1997
Cyrix USA
GEDD7733AM
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Core Frequency:133 MHz
Board Frequency:66 MHz
Clock Multiplier:2.0
Data bus (ext.):64 Bit
Address bus:32 Bit
Transistors:6,500,000
Circuit Size:0.35
Core / I/O Voltage:2.9 / 3.3 V
Introduced:May 30, 1997
Manufactured:week 33/1997
Made in:USA
L1 Cache:64 KB
CPU Code:M2
Package Type:Ceramic
PGA-296
Goldcap
Socket: 7
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Cyrix 6x86MX-PR200, 75 MHz Bus
Cyrix 6x86MX-PR200, 75 MHz Bus Top Side
Cyrix
6x86MX-PR200
75MHz Bus 2x
2.9V
FAN/HEATSINK REQUIRED
Cyrix 6x86MX-PR200, 75 MHz Bus Back Side
COPYRIGHT USA
(C)(M)1995-1997
Cyrix USA
GEKF7729F
CANADA
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Core Frequency:150 MHz
Board Frequency:75 MHz
Clock Multiplier:2.0
Data bus (ext.):64 Bit
Address bus:32 Bit
Transistors:6,500,000
Circuit Size:0.35
Core / I/O Voltage:2.9 / 3.3 V
Introduced:May 30, 1997
Manufactured:week 29/1997
Made in:Canada
L1 Cache:64 KB
CPU Code:M2
Package Type:Ceramic
PGA-296
Goldcap
Socket: 7
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Cyrix 6x86MX-PR200, 66 MHz Bus
Cyrix 6x86MX-PR200, 66 MHz Bus Top Side
Cyrix
6x86MX-PR200
66MHz Bus 2.5x
2.9V
FAN/HEATSINK REQUIRED
Cyrix 6x86MX-PR200, 66 MHz Bus Back Side
COPYRIGHT USA
(c)(M)1995-1997
Cyrix USA
GEDD8741T
add comment
Core Frequency:166 MHz
Board Frequency:66 MHz
Clock Multiplier:2.5
Data bus (ext.):64 Bit
Address bus:32 Bit
Transistors:6,500,000
Circuit Size:0.35
Core / I/O Voltage:2.9 / 3.3 V
Introduced:May 30, 1997
Manufactured:week 41/1997
Made in:USA
L1 Cache:64 KB
CPU Code:M2
Package Type:Ceramic
PGA-296
Goldcap
Socket: 7
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Cyrix 6x86MX-PR233
Cyrix 6x86MX-PR233 Top Side
Cyrix
6x86MX-PR233
75MHz Bus 2.5x
2.9V
FAN/HEATSINK REQUIRED
Cyrix 6x86MX-PR233 Back Side
COPYRIGHT USA
(c)(M)1995-1997
CYRIX USA
GFKFF801U
CANADA
add comment
Core Frequency:188 MHz
Board Frequency:75 MHz
Clock Multiplier:2.5
Data bus (ext.):64 Bit
Address bus:32 Bit
Transistors:6,500,000
Circuit Size:0.35
Core / I/O Voltage:2.9 / 3.3 V
Introduced:May 30, 1997
Manufactured:week 01/1998
Made in:Canada
L1 Cache:64 KB
CPU Code:M2
Package Type:Ceramic
PGA-296
Goldcap
Socket: 7
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