AMD Am486 & Am5x86

Am386 ◄ Am486/5x86 ► K5

The Am486 is a 80486-class family of computer processors that was produced by AMD in the 1990s. Intel beat AMD to market by nearly four years, but AMD priced its 40 MHz 486 at or below Intel's price for a 33 MHz chip, offering about 20% better performance for the same price. While competing 486 chips, such as those from Cyrix, benchmarked lower than the equivalent Intel chip, AMD's 486 matched Intel's performance on a clock-for-clock basis.

AMD's higher clocked 486 chips provided superior performance to many of the early Pentium chips, especially the 60 and 66 MHz launch products.

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AMD Am486 DX

AMD Am486 DX-40

AMD Am486 DX-40
Specification Details

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Type	Central processing unit / CPU
Family	AMD 80486
CPU part number	A80486DX-40
Introduction	04/01/93
Manufacturing Date	29th week of 1994
Package	168-pin CPGA
Socket	Socket 2/3
Dimensions	44,5 mm x 44,5 mm
Microarchitecture	80486
Codename	80486
Manufacturing process	700 nm
Transistors	1000000
Instruction set	CISC
Frequency	40 MHz
Bus Speed	40 MHz
Multiplier	x1
L1 Cache	8 KB
Data width	32 Bit
Floating Point Unit (FPU)	Integrated
Vcore	5 Volt

AMD Am486 DX2

AMD Am486 DX2-66

CPU die picture:

AMD Am486 DX2 Die Picture by Pauli Rautakorpi - Published under the Creative Commons Attribution 3.0 Unported license. Slightly edited by HARDWARECOP.

A80486DX2-66
Specification Details

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Type	Central processing unit / CPU
Family	AMD 80486
CPU part number	A80486DX2-66
Introduction	September 1994
Manufacturing Date	30th week of 1994
Package	168-pin CPGA
Socket	Socket 2/3
Dimensions	44,5 mm x 44,5 mm
Microarchitecture	80486
Codename	80486
Manufacturing process	500 nm
Transistors	1200000
Instruction set	CISC
Frequency	66 MHz
Bus Speed	33 MHz
Multiplier	x1
L1 Cache	8 KB
Data width	32 Bit
Floating Point Unit (FPU)	Integrated
Power consumption	5 Watt
Vcore	5 Volt

AMD Am486 DX2-80

CPU die picture:

A80486DX2-80
Specification Details

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Type	Central processing unit / CPU
Family	AMD 80486
CPU part number	A80486DX2-80
Introduction	?
Manufacturing Date	37th week of 1994
Package	168-pin CPGA
Socket	Socket 2/3
Dimensions	44,5 mm x 44,5 mm
Microarchitecture	80486
Codename	80486
Manufacturing process	700 nm?
Transistors	1200000
Instruction set	CISC
Frequency	80 MHz
Bus Speed	40 MHz
Multiplier	x2
L1 Cache	8 KB
Data width	32 Bit
Floating Point Unit (FPU)	Integrated
Power consumption	?
Vcore	5 Volt

A80486DX2-80 V8T
Specification Details

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Type	Central processing unit / CPU
Family	AMD 80486
CPU part number	A80486DX2-80 V8T
Introduction	09/1994
Manufacturing Date	48th week of 1994
Package	168-pin CPGA
Socket	Socket 2/3
Dimensions	44,5 mm x 44,5 mm
Microarchitecture	80486
Codename	80486
Manufacturing process	500 nm
Transistors	1200000
Frequency	80 MHz
Bus Speed	40 MHz
Multiplier	x2
L1 Cache	8 KB
Data width	32 Bit
Floating Point Unit (FPU)	Integrated
Power consumption	?
Vcore	5 Volt

AMD Am486 SX2

AMD Am486 SX2-66

A80486SX2-66
Specification Details

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Type	Central processing unit / CPU
Family	AMD 80486
CPU part number	A80486SX2-66
Introduction	04/1994
Manufacturing Date	23rd week of 1994
Package	168-pin CPGA
Socket	Socket 2/3
Dimensions	44,5 mm x 44,5 mm
Microarchitecture	80486
Codename	80486
Manufacturing process	700 nm?
Transistors	?
Frequency	66 MHz
Bus Speed	33 MHz
Multiplier	x2
L1 Cache	8 KB
Data width	32 Bit
Floating Point Unit (FPU)	None / 80487 SX? capable
Power consumption	?
Vcore	5 Volt

AMD Am486 DX4

AMD Am486 DX4-100

CPU die picture:

AMD Enhanced Am486 DX4-100 A80486DX4-100SV8B

A80486DX4-100NV8T
Specification Details

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Type	Central processing unit / CPU
Family	AMD 80486
CPU part number	A80486DX4-100NV8T
Introduction	?
Manufacturing Date	13th week of 1995
Package	168-pin CPGA
Socket	Socket 2/3
Dimensions	44,5 mm x 44,5
Microarchitecture	80486
Codename	80486
Manufacturing process	500 nm?
Transistors	?
Instruction set	CISC
Frequency	100 MHz
Bus Speed	33 MHz
Multiplier	x3
L1 Cache	8 KB
Data width	32 Bit
Floating Point Unit (FPU)	Integrated
Power consumption	?
Vcore	3 Volt

A80486DX4-100SV8B
Specification Details

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Type	Central processing unit / CPU
Family	AMD 80486
CPU part number	A80486DX4-100SV8B
Introduction	?
Manufacturing Date	44th week of 1995
Package	168-pin CPGA
Socket	Socket 2/3
Dimensions	44,5 mm x 44,5 mm
Microarchitecture	80486
Codename	80486
Manufacturing process	500 nm
Transistors	?
Instruction set	CISC
Frequency	100 MHz
Bus Speed	33 MHz
Multiplier	x3
L1 Cache	8 KB
Data width	32 Bit
Floating Point Unit (FPU)	Integrated
Power consumption	3 Watt
Vcore	3.3 Volt

AMD Am486 DX4-120

CPU die picture:

AMD Am486 DX4-120 (SV8B) Die Picture by Pauli Rautakorpi - Published under the Creative Commons Attribution 3.0 Unported license. Slightly edited by HARDWARECOP.

A80486DX4-120SV8B kindly donated by Pauli Rautakorpi.

A80486DX4-120NV8T
Specification Details

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Type	Central processing unit /CPU
Family	AMD 80486
CPU part number	A80486DX4-120NV8T
Introduction	?
Manufacturing Date	25th week of 1995
Package	168-pin CPGA
Socket	Socket 2/3
Dimensions	44,5 mm x 44,5 mm
Microarchitecture	80486
Codename	X5?
Manufacturing process	500 nm
Transistors	?
Instruction set	CISC
Frequency	120 MHz
Bus Speed	40 MHz
Multiplier	x3
L1 Cache	8 KB
Data width	32 Bit
Floating Point Unit (FPU)	Integrated
Power consumption	3 Watt
Vcore	3.3 Volt

A80486DX4-120SV8B
Specification Details

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Type	Central processing unit / CPU
Family	AMD 80486
CPU part number	A80486DX4-120SV8B
Introduction	06/05/1995
Manufacturing Date	3rd week of 1996
Package	168-pin CPGA
Socket	Socket 2/3
Dimensions	44,5 mm x 44,5 mm
Microarchitecture	80486
Codename	80486
Manufacturing process	500 nm?
Transistors	?
Instruction set	CISC
Frequency	120 MHz
Bus Speed	40 MHz
Multiplier	x3
L1 Cache	8 KB
Data width	32 Bit
Floating Point Unit (FPU)	Integrated
Power consumption	?
Vcore	3 Volt

AMD Am5x86

The AMD Am5x86 was one of the fastest, and most universally compatible upgrade paths for users of 486 systems. Introduced in November 1995, the Am5x86 is an Enhanced Am486 processor with an internally set multiplier of 4, allowing it to run at 133 MHz on systems without official support for clock-multiplied DX2 or DX4 486 processors.

AMD Am5x86-P75

CPU-Z:

CPU die:

AMD-X5-133ADW
Specification Details

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Type	Central processing unit / CPU
Family	AMD Am5x86
CPU part number	AMD-X5-133ADW
Introduction	09/01/95
Introduction price	$ 93
Manufacturing Date	13th week of 1996
Package	168-pin CPGA
Socket	Socket 2/3
Dimensions	44,5 mm x 44,5 mm
Microarchitecture	80486
Codename	80486
Manufacturing process	350 nm
Transistors	1600000
Instruction set	CISC
Frequency	133 MHz
Bus Speed	33 MHz
Multiplier	x4
L1 Cache	16 KB unified code and data
Data width	32 Bit
Floating Point Unit (FPU)	Integrated
Vcore	3.45 Volt

Unlisted models:

Am486 DX: 25 MHz, 33 MHz
Am486 DE2: 66 MHz
Am486 SX: 33 MHz, 40 MHz
Am486 DX2: 50 MHz
Am486 SX2: 50 MHz
Am486 DX4: 75 MHz, 90 MHz
Enhanced Am486 DX2: 66 MHz, 80 MHz
Enhanced Am486 DX4: 75 MHz
Am5x86: 150 MHz, 160 MHz

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