30. Pentium Pro

• Introduced in 1995.

• Three-way superscalar performance, 3 instructions per clock cycle.

• 36-bit address bus.

• 64 GB address space.

• Introduced dynamic execution:

  • Out-of-order execution.

  • Speculative execution.

• In addition to the level-1 cache, has 256 KB level-2 cache.