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Cyrix 80387 FPU Family

FPU for 386DX
FasMath CX-83D87-25-GP
FasMath CX-83D87-33-GP
FasMath CX-83D87-40-GP

FPU for 386SX
FasMath CX83S87-40-JP

FPU for 486DLC
Cx87DLC-40QP

FPU for 486SLC
Cx87SLC-33QP

FPU for 486SX
Cx487S40QP

Unknown / unrated
Cyrix 387 FPU w/o marking



FPU for 386DX


FasMath CX-83D87-25-GP






  Frequency: 25 MHz
  Bus: 25 MHz
  ID: -
  Package: CPGA-68
  Socket: -
  Technology: 1 mcm
  Year: 1993

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FasMath CX-83D87-33-GP






  Frequency: 33 MHz
  Bus: 33 MHz
  Package: CPGA-68
  Socket: -
  Technology: 1 mcm
  Year: 1993

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FasMath CX-83D87-40-GP






  Frequency: 40 MHz
  Bus: 40 MHz
  Package: CPGA-68
  Socket: -
  Technology: 1 mcm
  Year: 1993

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FPU for 386SX


FasMath CX83S87-40-JP






  Frequency: 40 MHz
  Bus: 40 MHz
  Package: CPGA-68
  Socket: -
  Technology: 1 mcm
  Year: 1994

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FPU for 486DLC


Cx87DLC-40QP






  Frequency: 40 MHz
  Bus: 40 MHz
  Package: PQFP-80 on PGA-68
  Socket: -
  Technology: ?
  Year: 1993

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FPU for 486SLC


Cx87SLC-33QP






  Frequency: 33 MHz
  Bus: 33 MHz
  Package: PQFP-80
  Socket: -
  Technology: ?
  Year: 1993

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FPU for 486SX


Cx487S40QP






  Frequency: 40 MHz
  Bus: 40 MHz
  Package: PQFP-80 on PGA-68
  Socket: -
  Technology: ?
  Year: 1993

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Unknown / unrated


Cyrix 387 FPU w/o marking






  Frequency: ?
  Bus: ?
  ID: -
  Package: PQFP-80 on PGA-68
  Socket: -
  Technology: ?
  Year: 1993

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