You may need a video card (GPU) in a virtual machine for tasks like OpenGL, Direct3D, and CUDA. In that case, we usually use an emulated video card, which is not as good of a performer as a dedicated ...
If VirtualBox is not detecting the Graphics card, execute the solutions given below. Enable 3D Acceleration and increase VRAM Install the correct display driver in the Guest OS Allocate more system ...
WTF?! Now you can bypass your hard drive and store your whole operating system in your VRAM (should you want to). Well-known Windows modder NTDEV has demonstrated how, and it's surprisingly painless.