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


FPU for 386SX


FPU for 486DLC


FPU for 486SLC


FPU for 486SX


Unknown / unrated


FPU for 386DX



FPU for 386SX

FPU for 486DLC

FPU for 486SLC

FPU for 486SX

Unknown / unrated



FPU for 386DX

FasMath CX-83D87-25-GP | ||
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Frequency: 25 MHz
Bus: 25 MHz ID: - Package: CPGA-68 Socket: - Technology: 1 mcm Year: 1993 Top |
FasMath CX-83D87-33-GP | ||
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Frequency: 33 MHz
Bus: 33 MHz Package: CPGA-68 Socket: - Technology: 1 mcm Year: 1993 Top |
FasMath CX-83D87-40-GP | ||
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Frequency: 40 MHz
Bus: 40 MHz Package: CPGA-68 Socket: - Technology: 1 mcm Year: 1993 Top |

FPU for 386SX

FasMath CX83S87-40-JP | ||
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Frequency: 40 MHz
Bus: 40 MHz Package: CPGA-68 Socket: - Technology: 1 mcm Year: 1994 Top |

FPU for 486DLC

Cx87DLC-40QP | ||
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Frequency: 40 MHz
Bus: 40 MHz Package: PQFP-80 on PGA-68 Socket: - Technology: ? Year: 1993 Top |

FPU for 486SLC

Cx87SLC-33QP | ||
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Frequency: 33 MHz
Bus: 33 MHz Package: PQFP-80 Socket: - Technology: ? Year: 1993 Top |

FPU for 486SX

Cx487S40QP | ||
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Frequency: 40 MHz
Bus: 40 MHz Package: PQFP-80 on PGA-68 Socket: - Technology: ? Year: 1993 Top |

Unknown / unrated

Cyrix 387 FPU w/o marking | ||
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Frequency: ?
Bus: ? ID: - Package: PQFP-80 on PGA-68 Socket: - Technology: ? Year: 1993 Top |