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[ The PC Guide | Systems and Components Reference Guide | The Processor | Processor Architecture and Operation | Internal Processor Interfaces and Operation | Internal Architectural Components ]

Main Architectural Components of Specific Processors

This section contains a summary table showing the major architectural components of the various processors. To see full details of all the characteristics for any specific processor, look here.

Processor Family

Integer Execution Units

Floating Point Unit

Pipeline Depth

Level 1 Cache (Data/Instr.)

Level 2 Cache Type

Branch Prediction Buffer / Accuracy

8088

1

Optional

1

--

--

--

8086

1

Optional

1

--

--

--

80286

1

Optional

1

--

--

--

80386DX

1

Optional

4

--

--

--

80386SX

1

Optional

4

--

--

--

80486DX

1

Integrated

5

8 KB Unified

Motherboard

--

80486SX

1

Optional

5

8 KB Unified

Motherboard

--

80486DX2

1

Integrated

5

8 KB Unified

Motherboard

--

80486DX4

1

Integrated

5

8 KB (AMD, Cyrix) 16 KB (Intel) Unified

Motherboard

--

AMD 5x86

1

Integrated

5

16 KB Unified

Motherboard

--

Cyrix 5x86

1

Integrated

6

16 KB Unified

Motherboard

!? / !?

Pentium

2

Integrated

5

8 KB / 8 KB

Motherboard

256 / 80%

Pentium OverDrive (for 80486s)

2

Integrated

5

16 KB / 16 KB

Motherboard

256 / 80%

Pentium OverDrive (for Pentiums)

2

Integrated

5

8 KB / 8 KB

Motherboard

256 / 80%

Pentium with MMX

4 (2 for MMX)

Integrated

6

16 KB / 16 KB

Motherboard

512 / 90%

Pentium with MMX OverDrive

4 (2 for MMX)

Integrated

6

16 KB / 16 KB

Motherboard

512 / 90%

6x86

2

Integrated

7

16 KB Unified

Motherboard

256 / 85-90%

K5

5

Integrated

5

8 KB / 16 KB

Motherboard

1024 / 75%

Pentium Pro

4

Integrated

14

8 KB / 8 KB

Integrated, Processor Speed

512 / 90%

Pentium II

5?

Integrated

14?

16 KB / 16 KB

SEC, Half Processor Speed

512 / 90%

K6

6

Integrated

6

32 KB / 32 KB

Motherboard

8192 / 95%

6x86MX

2

Integrated

7

64 KB Unified + 0.25 KB Instruction

Motherboard

512 / !?

Next: Instruction Execution Process


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