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Cyrix Cx486 DX
  Cyrix Cx486DX-33GP
  Cyrix Cx486DX-V33QP
  Cyrix Cx486DX-40GP
  Cyrix Cx486DX-40 w/ Cooler, old Logo
  Cyrix Cx486DX-40 w/ Cooler, newer Logo
  Cyrix Cx486DX-40 w/ Cooler, new Logo
  Cyrix Cx486DX2-50GP
  Cyrix Cx486DX2-50 w/ Cooler
  Cyrix Cx486DX2-50 w/ Cooler, 'Write-Back'
  Cyrix Cx486DX2-66GP
  Cyrix Cx486DX2-66GP ("Cooling Fan Required")
  Cyrix Cx486DX2-V66GP
  Cyrix Cx486DX2-V66GP 3.45V
  Cyrix Cx486DX2-66 w/ Cooler
  Cyrix Cx486DX2-V80GP 4.0V
  Cyrix Cx486DX2-V80GP 3.45V
  Cyrix Cx486DX2-80 w/ Cooler
  Cyrix Cx486DX4-100GP
  Cyrix Cx486DX4-100GP4
» Cyrix overview
» all 486 chips
 
The Cyrix 486DX Processor
The Cyrix Cx486DX was designed to be completely software-compatible with Intel's i486DX processor. It is not just an Intel clone but a completely new design by Cyrix. Compared to the i486DX the Cx486DX had an improved cache algorithm and therefore was faster in specific applications. The price for a Cx486DX was a little lower than for Intel's 486DX and made the processor a very common i486DX alternative.
 
References:  Cyrix 486DX2/DX4 Processor FAQs  Cyrix 486DX2/DX4 Processor Brief
Cyrix Cx486DX-33GP
Cyrix Cx486DX-33GP Top Side
Cx486
DX 33
Cx486DX-33GP
Cyrix Cx486DX-33GP Back Side
COPYRIGHT USA
1993 CYRIX
B190702
N04022OU
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Core Frequency:33 MHz
Board Frequency:33 MHz
Data bus (ext.):32 Bit
Address bus:32 Bit
Voltage:5 V
Introduced:09/1993
Manufactured:week 02/1994
L1 Cache:8 KB
CPU Code:Cx486 DX
M6
Package Type:Ceramic
PGA-168
Socket: 2/3
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Cyrix Cx486DX-V33QP
Cyrix Cx486DX-V33QP Top Side
Cx486
DX V33
Cx486DX-V33QP
003 FJ5415E
Cyrix Cx486DX-V33QP Back Side
A low voltage version of the Cx486DX-33 (3.3V compared to 5V in the standard version). This processor was intended to be used in mobile devices and comes in a surface-mount PQFP version. This item here is soldered on a small adaptor with standard socket 2/3 pinout.
 
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Core Frequency:33 MHz
Board Frequency:33 MHz
Data bus (ext.):32 Bit
Address bus:32 Bit
Voltage:3.3 V
Introduced:09/1993
Manufactured:week 15/1994
L1 Cache:8 KB
CPU Code:Cx486 DX
M6
Package Type:Plastic
PQFP-208 on
PGA-168
Socket: 2/3
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Cyrix Cx486DX-40GP
Cyrix Cx486DX-40GP Top Side
Cx486
DX 40
Cx486DX-40GP
Cyrix Cx486DX-40GP Back Side
(c)(m)1993 Cyrix USA
JAPAN
ABE413R
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Core Frequency:40 MHz
Board Frequency:40 MHz
Data bus (ext.):32 Bit
Address bus:32 Bit
Voltage:5 V
Introduced:09/1993
Manufactured:week 13/1994
Made in:Japan
L1 Cache:8 KB
CPU Code:Cx486 DX
M6
Package Type:Ceramic
PGA-168
Socket: 2/3
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Cyrix Cx486DX-40 w/ Cooler, old Logo
Cyrix Cx486DX-40 w/ Cooler, old Logo Top Side
Cx486
DX 40
Cyrix Cx486DX-40 w/ Cooler, old Logo Back Side
COPYRIGHT USA
1993 CYRIX
8190702N07032
FK3407T
Donated by Christian Lederer. Thanks a lot!  
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Core Frequency:40 MHz
Board Frequency:40 MHz
Data bus (ext.):32 Bit
Address bus:32 Bit
Voltage:5 V
Introduced:09/1993
Manufactured:week 40/1994
L1 Cache:8 KB
CPU Code:Cx486 DX
M6
Package Type:Ceramic
PGA-168
Cooler
Socket: 2/3
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Cyrix Cx486DX-40 w/ Cooler, newer Logo
Cyrix Cx486DX-40 w/ Cooler, newer Logo Top Side
Cx486
DX 40
Cyrix Cx486DX-40 w/ Cooler, newer Logo Back Side
(C) (M) 1993 Cyrix USA
ALB348A
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Core Frequency:40 MHz
Board Frequency:40 MHz
Data bus (ext.):32 Bit
Address bus:32 Bit
Voltage:5 V
Introduced:09/1993
Manufactured:week 48/1993
L1 Cache:8 KB
CPU Code:Cx486 DX
M6
Package Type:Ceramic
PGA-168
Cooler
Socket: 2/3
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Cyrix Cx486DX-40 w/ Cooler, new Logo
Cyrix Cx486DX-40 w/ Cooler, new Logo Top Side
Cx486
DX 40
Cyrix Cx486DX-40 w/ Cooler, new Logo Back Side
(C)(M)1993 Cyrix USA
JAPAN
ABF419E
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Core Frequency:40 MHz
Board Frequency:40 MHz
Data bus (ext.):32 Bit
Address bus:32 Bit
Voltage:5 V
Introduced:09/1993
Manufactured:week 19/1994
Made in:Japan
L1 Cache:8 KB
CPU Code:Cx486 DX
M6
Package Type:Ceramic
PGA-168
Cooler
Socket: 2/3
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Cyrix Cx486DX2-50GP
Cyrix Cx486DX2-50GP Top Side
Cx468DX2-50GP
Cyrix Cx486DX2-50GP Back Side
COPYRIGHT USA
1993 CYRIX
03H5127N14029
FK5414Z
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Core Frequency:50 MHz
Board Frequency:25 MHz
Clock Multiplier:2.0
Data bus (ext.):32 Bit
Address bus:32 Bit
Voltage:5 V
Introduced:1993
Manufactured:week 14/1994
Made in:USA
L1 Cache:8 KB
CPU Code:Cx468 DX2
M7
Package Type:Ceramic
PGA-168
Socket: 1/2/3
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Cyrix Cx486DX2-50 w/ Cooler
Cyrix Cx486DX2-50 w/ Cooler Top Side
Cx468DX2-50
Cyrix Cx486DX2-50 w/ Cooler Back Side
COPYRIGHT USA
1993 CYRIX
03H5127N14309
FK5414Z
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Core Frequency:50 MHz
Board Frequency:25 MHz
Clock Multiplier:2.0
Data bus (ext.):32 Bit
Address bus:32 Bit
Voltage:5 V
Introduced:1993
Manufactured:week 14/1994
Made in:USA
L1 Cache:8 KB
CPU Code:Cx468 DX2
M7
Package Type:Ceramic
PGA-168
Socket: 1/2/3
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Cyrix Cx486DX2-50 w/ Cooler, 'Write-Back'
Cyrix Cx486DX2-50 w/ Cooler, 'Write-Back' Top Side
Cx468DX2-50
CYRIX WRITE BACK
Win Logo
Cyrix Cx486DX2-50 w/ Cooler, 'Write-Back' Back Side
COPYRIGHT USA
1993 CYRIX
03H8341 N35091
F2KM435FF
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Core Frequency:50 MHz
Board Frequency:25 MHz
Clock Multiplier:2.0
Data bus (ext.):32 Bit
Address bus:32 Bit
Voltage:5 V
Introduced:1993
Manufactured:week 35/1994
Made in:USA
L1 Cache:8 KB
CPU Code:Cx468 DX2
M7
Package Type:Ceramic
PGA-168
Socket: 1/2/3
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Cyrix Cx486DX2-66GP
Cyrix Cx486DX2-66GP Top Side
Cx468
DX2 66
Cx486DX2-66GP
Cyrix Cx486DX2-66GP Back Side
(C)(M) 1993 Cyrix USA
K2LR535AF
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Core Frequency:66 MHz
Board Frequency:33 MHz
Clock Multiplier:2.0
Data bus (ext.):32 Bit
Address bus:32 Bit
Voltage:5 V
Introduced:09/1993
L1 Cache:8 KB
CPU Code:Cx468 DX2
M7
Package Type:Ceramic
PGA-168
Socket: 1/2/3
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Cyrix Cx486DX2-66GP ("Cooling Fan Required")
Cyrix Cx486DX2-66GP (
Cx468
DX2 66
Cx486DX2-66GP
Cooling Fan Required
Cyrix Cx486DX2-66GP (
COPYRIGHT USA
1993 CYRIX
03H6366 N29037
PK9429D
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Core Frequency:66 MHz
Board Frequency:33 MHz
Clock Multiplier:2.0
Data bus (ext.):32 Bit
Address bus:32 Bit
Voltage:5 V
Introduced:09/1993
Manufactured:week 29/1994
Made in:Japan
L1 Cache:8 KB
CPU Code:Cx468 DX2
M7
Package Type:Ceramic
PGA-168
Socket: 1/2/3
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Cyrix Cx486DX2-V66GP
Cyrix Cx486DX2-V66GP Top Side
Cx468
DX2 V66
Cx486DX2-V66GP
017
Cyrix Cx486DX2-V66GP Back Side
(c) (M) 1993 Cyrix USA
JAPAN
G1BN448K
A low voltage version of the Cx486DX2-66 (3.3V compared to 5V in the standard version).
 
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Core Frequency:66 MHz
Board Frequency:33 MHz
Clock Multiplier:2.0
Data bus (ext.):32 Bit
Address bus:32 Bit
Voltage:3.3 V
Introduced:09/1993
Manufactured:week 48/1994
Made in:Japan
L1 Cache:8 KB
CPU Code:Cx468 DX2
M7
Package Type:Ceramic
PGA-168
Socket: 1/2/3
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Cyrix Cx486DX2-V66GP 3.45V
Cyrix Cx486DX2-V66GP 3.45V Top Side
Cx468
DX2 V66
Cx486DX2-V66GP
3.45V/3.6V/4.0V
Cyrix Cx486DX2-V66GP 3.45V Back Side
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Core Frequency:66 MHz
Board Frequency:33 MHz
Clock Multiplier:2.0
Data bus (ext.):32 Bit
Address bus:32 Bit
Voltage:3.45 V
Introduced:09/1993
L1 Cache:8 KB
CPU Code:Cx468 DX2
M7
Package Type:Ceramic
PGA-168
Socket: 1/2/3
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Cyrix Cx486DX2-66 w/ Cooler
Cyrix Cx486DX2-66 w/ Cooler Top Side
Cx486
DX2 66
Cyrix Cx486DX2-66 w/ Cooler Back Side
(c) (M) 1993 Cyrix USA
H1LP519B
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Core Frequency:66 MHz
Board Frequency:33 MHz
Clock Multiplier:2.0
Data bus (ext.):32 Bit
Address bus:32 Bit
Voltage:5 V
Introduced:09/1993
L1 Cache:8 KB
CPU Code:Cx468 DX2
M7
Package Type:Ceramic
PGA-168
Cooler
Socket: 1/2/3
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Cyrix Cx486DX2-V80GP 4.0V
Cyrix Cx486DX2-V80GP 4.0V Top Side
Cx468
DX2 V80
Cx486DX2-V80GP
4.0V
Cyrix Cx486DX2-V80GP 4.0V Back Side
COPYRIGHT USA
1993 CYRIX
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Core Frequency:80 MHz
Board Frequency:40 MHz
Clock Multiplier:2.0
Data bus (ext.):32 Bit
Address bus:32 Bit
Voltage:4 V
Introduced:09/1993
Manufactured:week 48/1994
L1 Cache:8 KB
CPU Code:Cx468 DX2
M7
Package Type:Ceramic
PGA-168
Socket: 1/2/3
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Cyrix Cx486DX2-V80GP 3.45V
Cyrix Cx486DX2-V80GP 3.45V Top Side
Cx468
DX2 V80
Cx486DX2-V80GP
017-3.45V
Cyrix Cx486DX2-V80GP 3.45V Back Side
(C)(M) 1993 Cyrix USA
USA
G3CQ517A
Donated by Jorge Segovia. Thanks a lot!  
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Core Frequency:80 MHz
Board Frequency:40 MHz
Clock Multiplier:2.0
Data bus (ext.):32 Bit
Address bus:32 Bit
Voltage:3.45 V
Introduced:09/1993
Manufactured:week 17/1995
Made in:USA
L1 Cache:8 KB
CPU Code:Cx468 DX2
M7
Package Type:Ceramic
PGA-168
Socket: 1/2/3
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Cyrix Cx486DX2-80 w/ Cooler
Cyrix Cx486DX2-80 w/ Cooler Top Side
Cx486
DX2 80
Cyrix Cx486DX2-80 w/ Cooler Back Side
(c) (M) 1993 Cyrix USA
A8LP514E
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Core Frequency:80 MHz
Board Frequency:40 MHz
Clock Multiplier:2.0
Data bus (ext.):32 Bit
Address bus:32 Bit
Voltage:5 V
Introduced:09/1993
Manufactured:week 14/1995
L1 Cache:8 KB
CPU Code:Cx468 DX2
M7
Package Type:Ceramic
PGA-168
Cooler
Socket: 1/2/3
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Cyrix Cx486DX4-100GP
Cyrix Cx486DX4-100GP Top Side
DX4 100
Cx486DX4-100GP
3.45V
COOLING FAN REQUIRED
Cyrix Cx486DX4-100GP Back Side
(c) (M) 1993 Cyrix USA
G3LU528H
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Core Frequency:100 MHz
Board Frequency:33 MHz
Clock Multiplier:3.0
Data bus (ext.):32 Bit
Address bus:32 Bit
Voltage:3.45 V
Introduced:09/1995
Manufactured:week 28/1995
L1 Cache:8 KB
CPU Code:Cx468 DX4
M9
Package Type:Ceramic
PGA-168
Socket: 1/2/3
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Cyrix Cx486DX4-100GP4
Cyrix Cx486DX4-100GP4 Top Side
DX4 100
Cx486DX4-100GP4
DX4-P/O
3.54V
Cyrix Cx486DX4-100GP4 Back Side
(c) (M) 1993 Cyrix USA
G3FU529J
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Core Frequency:100 MHz
Board Frequency:33 MHz
Clock Multiplier:3.0
Data bus (ext.):32 Bit
Address bus:32 Bit
Voltage:3.54 V
Introduced:09/1995
Manufactured:week 29/1995
L1 Cache:8 KB
CPU Code:Cx468 DX4
M9
Package Type:Ceramic
PGA-168
Socket: 1/2/3
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