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Cyrix Cx486 DRx
  Cyrix Cx486DRx²25/50GP
  Cyrix Cx486DRx²33/66GP
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Cyrix Cx486 DRx Processors
Cyrix DRx² chips are clock-doubled versions of the Cyrix DLC processors and thus the most effective way to upgrade an i386DX based system. With its clock-doubling feature, the upgrade processor effectively doubles a 386 computer's internal processor speed without requiring a new motherboard. It also delivers other performance enhancements such as 1K on-chip cache with Cyrix cache coherency technology, single cycle instruction execution, and a hardware integer multiplier. These features can boost application performance up to 70% and more.
 
References:  Cyrix 386-to-486 Upgrade Processor Overview  Cyrix 386-to-486 Upgrade Processor FAQs
Cyrix Cx486DRx²25/50GP
Cyrix Cx486DRx²25/50GP Top Side
Cx486DRx²25/50GP
FL5407C
Cyrix Cx486DRx²25/50GP Back Side
(C)(M) 1993 Cyrix USA
FL5407C
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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:09/1993
Manufactured:week 07/1994
L1 Cache:1 KB
Package Type:Ceramic
PGA-168
Socket: 1/2/3
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Cyrix Cx486DRx²33/66GP
Cyrix Cx486DRx²33/66GP Top Side
Cx486DRx²33/66GP
F2B6438J
Cyrix Cx486DRx²33/66GP Back Side
(C)(M) 1993 Cyrix USA
Japan
F2B6448J
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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 38/1994
Made in:Japan
L1 Cache:1 KB
Package Type:Ceramic
PGA-168
Socket: 1/2/3
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