Intel ISA reference adds Razor Lake and Coral Rapids model IDs

Intel added Razor Lake and Coral Rapids model IDs to the November edition of its Architecture Instruction Set Extensions Programming Reference. The document, Revision 063, includes four new model values for Razor Lake under family 18 (12H). These include 12_06H and 12_0AH for desktop models and 12_07H and 12_09H for laptops. The Coral Rapids Xeon family receives model ID 13_08H.

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Razor Lake has a feature that allows separate control over certain speculative memory behavior for supervisor mode and user mode. Both Razor Lake and Coral Rapids gain APIC-Timer Virtualization for virtual machines. Coral Rapids also adds a VPMLDSABFLYDQ instruction for the ML-DSA digital signature standard. While the reference does not list them yet, GCC patches suggest Razor Lake carries the same ISA feature set as Nova Lake, which includes AVX10.2 and APX. Coral Rapids uses AVX10.2 instead of AVX10.3.

Intel says features in the reference are not guaranteed to reach final products. Razor Lake-S is reportedly a 2028 product on LGA-1954. CPU-Z added support for Razor Lake earlier in November.