Intel permanently eliminates AVX-512 on Alder Lake

Intel permanently eliminates AVX-512 on Alder Lake

As reported by Igorslab, Intel intends to disable AVX-512 instructions on Alder Lake CPUs. To do this, the well-known chip maker will likely release a new microcode update that will prevent any workaround from successfully enabling AVX-512 on motherboards.

Credit: Intel In fact, despite Intel's claims, it doesn't It took a long time for owners of Alder Lake processors to realize that disabling E-cores within the motherboard BIOS opened up the possibility to still enable AVX-512 support on P-cores. According to another IgorsLab article, it appears that this ability was born by chance. Motherboard manufacturers could reactivate the AVX-512 with microcode hacks in the BIOS. Almost every motherboard vendor has taken advantage of this, making it a mainstream option. Intel, however, has been firm on its position that Alder Lake doesn't officially support the AVX-512 and enabling the instruction set could lead to errors.

What's even more bizarre is the instruction set's performance. AVX-512, in specific workloads, are very efficient. IgorLabs also tested the strengths of the AVX-512, noting that the energy efficiency with the AVX-512 was higher than the AVX2. Recall that not all workloads benefit from the AVX-512; therefore, it is best not to assume that E-cores are undersized and disabling them to make the AVX-512 available again is always worth it. There are still many workloads that benefit from having both P-cores and E-cores working together.

if (jQuery ("# ​​crm_srl-th_hardware_d_mh2_1"). is (": visible")) {console.log ("Edinet ADV adding zone: tag crm_srl-th_hardware_d_mh2_1 slot id: th_hardware_d_mh2"); } Photo Credit: MSI Ultimately, Intel hasn't eliminated the AVX-512 instruction set on the Alder Lake die, and the chipmaker is doing its best to permanently delete this functionality in the near future. You can of course keep the BIOS of an existing motherboard, but at some point most motherboards will incorporate the updated microcode which disables AVX-512 support.

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