The Windows Experience score is easy to read and understand (5 numbers between 1 and 7). It's in the Windows 7 GUI. For Windows 8 and higher it's called Windows System Assessment Tool, and must be run from the command mode, as discussed in https://social.technet.microsoft.com/Forums/en-US/3b700ea8-1385-4599-9183-04614f6d6629/windows-experience-index-in-windows-10
Need some programs that can check that my PC is running to its full potential. Easy to read and understand because I just built this computer with good expensive parts, I wanna make sure it's running right.