Windows: Press Win + I > System > About
Windows: Press Ctrl + Shift + Esc > Performance tab
Windows: Press Win + R > type msinfo32 > Enter
Windows: Press Win + R > type dxdiag > Enter
Windows: Open Device Manager
Windows: Open Task Manager > Performance
Mac: Click Apple menu > About This Mac
Mac: Click Apple menu > System Settings > General > About
Mac: Open System Information
Linux: Open Terminal > run lscpu
Linux: Open Terminal > run free -h
Linux: Open Terminal > run lshw
Linux: Open Terminal > run inxi -F
Linux: Open Settings > About
Check CPU, RAM, storage, GPU, and operating system details