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Cyrix Cx486 S
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Cyrix Cx486S-33GP
Cyrix Cx486S-33GP Top Side
Cx486
S 33
FASCACHE
Cx486S-33GP
Cyrix Cx486S-33GP Back Side
(c)(m)1993 Cyrix USA
JAPAN
DB2342J
Donated by Christian Lederer. Thanks a lot!  
Comment by VMUNIX (andres_leitner[at]yahoo.com.ar):
I'm wondering what "fastcache" stands for ? and why is it only 2Kb instead of 8Kb
 
The Cyrix 486S is a i486SX compatible processor with 2kB write back cache. All the other cpus on the market at this time had no write back cache. The 486S also had a special signal (write burst), the usage of this depends on the motherboard design. These both things brought cyrix a speed up of around 6% (to a i486SX).
 
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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:05/1993
Manufactured:week 42/1993
Made in:Japan
L1 Cache:2 KB
CPU Code:Cx486 S
M5
Package Type:Ceramic
PGA-168
Socket: 1/2/3
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Cyrix Cx486S-40 w/ Cooler
Cyrix Cx486S-40 w/ Cooler Top Side
Cx486
S 40
FASCACHE
Cyrix Cx486S-40 w/ Cooler Back Side
(c)(m)1993 Cyrix USA
JAPAN
AB1318B
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:05/1993
Manufactured:week 18/1993
Made in:Japan
L1 Cache:2 KB
CPU Code:Cx486 S
M5
Package Type:Ceramic
PGA-168
Cooler
Socket: 2/3
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Cyrix Cx486S-40GP
Cyrix Cx486S-40GP Top Side
Cx486
S 40
FASCACHE
Cx486S-40GP
Cyrix Cx486S-40GP Back Side
(c)(m)1993 Cyrix USA
JAPAN
DB2343K
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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:05/1993
Manufactured:week 45/1993
Made in:Japan
L1 Cache:2 KB
CPU Code:Cx486 S
M5
Package Type:Ceramic
PGA-168
Socket: 2/3
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