In order for you to play RetroArch on Linux with minimal graphics settings, your computer must meet the following requirements
Operating System:
Linux-based distro
Processor (CPU):
Intel Pentium 4 and up (CPU with SSE2 instructions required)
Memory (RAM):
32 MB RAM
Graphics Card:
Any compliant OpenGL 2.x or Direct3D11 GPU. For shaders to work properly, should support at least Shader Model 2.0.
Storage:
500 MB available space
In order to play RetroArch on Linux with maximum graphics settings, you need a computer with a configuration no worse than the following
Operating System:
Linux-based distro
Processor (CPU):
Intel Core series or AMD equivalent
Memory (RAM):
512 MB RAM
Graphics Card:
Intel: At least Intel HD 4K required for OpenGL, any compliant D3D11 GPU for Direct3D 11. Should support at least Shader Model 3.0 and/or 4.0.
Storage:
500 MB available space