The support of AVX512 Alder Lake CPUs has gone unnoticed by the general public, but many professionals need it for their work. The new series of desktop CPUs were listed with AVX512 instruction support in the Alder Lake series developer guide. Initially, AVX512 support was only available for large Performance cores on Alder Lake desktop CPUs, but Intel later changed the guidance and listed AVX512 as disabled on Alder Lake CPUs.
Analysts and overclockers have been quick to realize that, despite not having official support, Alder Lake CPUs continued to support AVX512 instructions. At least they are supported and can run successfully in benchmarks. Motherboard manufacturers even decided to offer support for AVX512 in case the CPU supports it. But in March of this year, Intel officially began removing support for AVX512, which means that even with a compatible BIOS, support for AVXXNUMX will no longer work.
Early Alder Lake CPUs have an old Intel logo and indicate if it supports AVX521
There is still a chance that customers may find AVX512-enabled CPUs. Intel has recently made a new revision that has a distinctive mark that can help you quickly distinguish each chip.
It turns out that Intel's new square logo, which has replaced the logo with the halo and company name, is probably the quickest way to check. Videocardz was able to check that people was wondering if the square logo means it's a fake CPU, as it did not resemble any previously released Alder Lake CPUs. But to the delight of many, it is not. It's just a subtle logo change following Intel's 2020 rebranding.
Overclocker Luumi explains that he wanted to add this information to his video of a cheap AVX-512 compatible machine, as he couldn't get AVX-512 to work on any of my previous G7400 CPUs. The hardware itself was fine, but actually none of those G7400 CPUs had AVX-512 support available, since was disabled by Intel at the factory. This is the case for all newer Alder Lake CPUs.
It seems that almost all 2022 Alder Lake CPUs have AVX-512 disabled, making it more efficient to search for a 2021 CPU. Luumi added that Intel left a mark to determine whether the CPU supports AVX-512 or not, and is looking the IHS. All CPUs that have a halo mark of the old logo above the word Intel in the IHS will support AVX-512. On the other hand, and all CPUs with the square Intel logo will have it disabled by default. This means that, at least with Pentiums and other low-end models, you can go to a store and look at the IHS of the processor to see if it has AVX-512 or not.
Source: Videocardz
