Advanced Performance Extensions (APX) expand the entire x86 instruction set with access to more registers and adds various new features that improve general-purpose performance.
This is AMD64 - extensions to x86_64/AMD64 are created all the time, after a while they become expected by software distributors and compiled software relies on their existence. That’s why new games don’t work on old CPUs.
This is AMD64 - extensions to x86_64/AMD64 are created all the time, after a while they become expected by software distributors and compiled software relies on their existence. That’s why new games don’t work on old CPUs.