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In older Alder Lake family CPUs with some legacy combinations of BIOS and microcode revisions, it was possible to execute AVX-512 family instructions when disabling all the efficiency cores which do not contain the silicon for AVX-512. [30] [31] [32]
On early revisions of microprocessors it still can be enabled on some motherboards with some BIOS versions by disabling the E-cores. [18] [20] Intel has physically fused off AVX-512 on later revisions of Alder Lake CPUs manufactured in early 2022 and onward. [21] [22] ~18% IPC uplift. [23] Gracemont efficient cores ("E-cores")
In early 2022, Intel began disabling in silicon (fusing off) AVX-512 in Alder Lake microprocessors to prevent customers from enabling AVX-512. [35] In older Alder Lake family CPUs with some legacy combinations of BIOS and microcode revisions, it was possible to execute AVX-512 family instructions when disabling all the efficiency cores which do ...
In 2019, with Coffee Lake, Intel temporarily moved away from including hyper-threading in mainstream Core i7 desktop processors except for highest-end Core i9 parts or Pentium Gold CPUs. [36] It also began to recommend disabling hyper-threading, as new CPU vulnerability attacks were revealed which could be mitigated by disabling HT. [37]
The microarchitecture is used as the efficient cores of the 12th generation of Intel Core hybrid processors (codenamed "Alder Lake"), the 13th generation of Intel Core hybrid processors (codenamed "Raptor Lake") and the 14th generation of Intel Core hybrid processors (codenamed "Raptor Lake Refresh").
The Niagara has eight cores, but each core has only one pipeline, so actually it uses fine-grained multithreading. Unlike SMT, where instructions from multiple threads share the issue window each cycle, the processor uses a round robin policy to issue instructions from the next active thread each cycle.
Granite Rapids is the codename for 6th generation Xeon Scalable server processors designed by Intel, launched on 24 September 2024. [1] [2] Featuring up to 128 P-cores, Granite Rapids is designed for high performance computing applications.
Most of the mobile and desktop processors come in two variants that differ in the size of the L2 cache, but the specific amount of L2 cache in a product can also be reduced by disabling parts at production time. Tigerton dual-cores and all quad-core processors except - are multi-chip modules combining two dies.