How to check features of your CPU

  • On Windows, you can check the features of your CPU using a tool like CPU-Z.

  • On the web, you can look up your CPU on Intel ARK and see its details. This is not recommended, since ARK does not show all the flags or features of a CPU.

  • On Linux, I like to look at the flags section of /proc/cpuinfo. To see what feature maps to each flag, see the arch/x86/include/asm/cpufeature.h in the Linux source code. The flags will all have a prefix of X86_FEATURE_ and the comment that follows describes the feature.