CPU-X is a Free software that gathers information on CPU, motherboard and more. CPU-X is similar to CPU-Z (only available for Microsoft Windows, see http://www.cpuid.com/softwares/cpu-z.html for more informations), but CPU-X is designed for GNU/Linux. It is written in C, and Graphical User Interface (GUI) uses GTK3+ library, so it's working out-of-box on X11 or Wayland. It is also possible to run a Text-based User Interface (TUI) which uses NCurses, or else to print data on standard output.
This is a companion discussion topic for the original entry at https://copr.fedorainfracloud.org/coprs/brollylssj/CPU-X/