If you are on Windows follow these steps to find out your VRAM:
1.Right-click on the Desktop and click Personalize.
2.Click Display in the bottom left corner of the Window.
3.Click the Change display settings on the left column.
4.Click the Advanced settings link to view the total available memory to the graphics card as well as the dedicated memory. The dedicated memory is how much memory your video card has.
You need a minimum of 512MB VRAM