Intel has added Razor Lake and Coral Rapids to the November edition of its Architecture Instruction Set Extensions Programming Reference, the document developers use to prepare software for upcoming chips. Revision 063 gives Razor Lake four new model values under family 18 (12H), the same family as Nova Lake, with 12_06H and 12_0AH covering desktop parts and 12_07H and 12_09H covering laptops. The Coral Rapids Xeon family gets 13_08H, following Diamond Rapids at 13_01H. InstLatX64 spotted the update and shared it on Bluesky.

The new feature entries are fairly small. Razor Lake picks up SSBD_PSFD_U_S, which seems to allow separate user-mode and supervisor-mode control over certain speculative memory behavior, while both families gain APIC-Timer Virtualization for virtual machines. Coral Rapids also gets a new instruction called VPMLDSABFLYDQ, aimed at ML-DSA, the quantum-resistant digital signature standard. According to Intel's GCC patches, posted this week, Razor Lake carries the same ISA feature set as Nova Lake, which should mean AVX10.2 and APX carry over, though the reference itself doesn't list Razor Lake under those rows yet. Coral Rapids sticks with AVX10.2 rather than the newer AVX10.3, at least for now.Neither family is anywhere near launch, though. Razor Lake-S is reportedly a 2028 product on LGA-1954, and Coral Rapids is the Xeon generation where Intel plans to bring back SMT that same year. Software support is already moving as well, with CPU-Z adding Razor Lake support earlier this month. Of course, Intel notes that features in the reference aren't guaranteed to reach final products.