There are quite a few different models of the Dell Vostro, you'd have to give us an exact model number but like I stated above you'd need a external GPU box which is going to be around $250 (cheaper model) and doesn't include the price of a GPU. Also the laptop needs to support USB Type C, if not your not getting nearly the full performance of the GPU.
Have you tried updating the iGPU driver on your CPU? I think newer versions may support OpenGL 3.0.