Intel also shipped a bunch of Pentium-branded CPUs that have AVX disabled, leading to oddities like a Kaby Lake based CPU that doesn't have AVX, and even worse,

Intel also shipped a bunch of Pentium-branded CPUs that have AVX disabled, leading to oddities like a Kaby Lake based CPU that doesn't have AVX, and even worse, also shipped a few CPUs that have AVX2 but not BMI2: https://sourceware.org/bugzilla/show_bug.cgi?id=29611 https://sourceware.org/bugzilla/show_bug.cgi?id=29611 https://developercommunity.visualstudio.com/t/Crash-in-Windows-SDK-10026100-pow-fu/10750174 https://developercommunity.visualstudio.com/t/Crash-in-Windo...