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> The Pentium 2 was the first Intel microarchitecture with register renaming. It was the first out of order as well. Wasn’t that the Pentium Pro?

• CalChris 7y ago
  I was reading Agner and he lumped them all together. But you might be right. DWIW, tick tock didn’t start until 2007.
• gpderetta 7y ago
  Yes. PentiumII was basically the Pentium pro with the MMX extensions and some minor improvements for desktop computers.