[ 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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