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Some Intel server processors have an F suffix in their model numbers. What does the F suffix indicate? I've noticed this mostly in Xeon and Phi processors.

Example: Intel® Xeon® Platinum 8176F Processor

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It's related to the Omni-Path Architecture. Check the notes section in the cpu-world specs page for 8176F, and you'll notice Omni-Path mentioned. Details about the chip can be found here, which mention Omni-Path.

Additionally, models that are suffixed with "F" (SKL-F) integrate the Omni-Path Host Fabric Interface (HFI) die on-package.

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    This answer is correct. This vs This makes it clear – Ramhound Jul 25 '17 at 18:11
  • @Ramhound thanks, I didn't check that before. I learned about Omni-Path like a month ago when I was reading about some CPU communication architectures, and Omni-Path had this specific suffix. – Erlis D. Jul 25 '17 at 18:19
  • Well CPU World made the statement but the specifications match the statement details. So I assume their statement about the model name is correct – Ramhound Jul 25 '17 at 22:55
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Looks like the AVX-512 Foundation extension.

https://en.wikipedia.org/wiki/AVX-512

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    This doesn't make sense considering AVX-512 is widely supported across Intel products including those that don't have a F in their model name. Link-only answer are typically frowned upon. – Ramhound Jul 25 '17 at 18:02
  • "AVX-512 Foundation" This just indicates the group of instructions which are 32-bit/64-bit that support 512 bit registers – Ramhound Jul 25 '17 at 18:04

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