I have GeForce GT610. I saw the settings of Nvdia control panel and add Blender for CUDA support but Blender 2.8 is not recognized my graphics card.
Cycles in Blender 2.8x requires a CUDA compute capability of 3.0 or higher. The Nvidia GeForce GT 610 has a CUDA compute capability of 2.1 which is below the minimum requirements for GPU rendering. This is documented in Blender's manual.
CUDA requires graphics cards with compute capability 3.0 and higher. To make sure your GPU is supported, see the list of Nvidia graphics cards with the compute capabilities and supported graphics cards. CUDA GPU rendering is supported on Windows, macOS, and Linux.