With video RAM configuration, you can configure the amount of VRAM that is assigned to the virtual machines in the pool.
When you enable the 3D Renderer setting and select the Automatic, Software, or Hardware option, you can configure the amount of VRAM that is assigned to the virtual machines in the pool by moving the slider in the Configure VRAM for 3D guests box. The minimum VRAM size is 512MB. The default VRAM size is 96MB:
The VRAM settings that you configure in Horizon Console take precedence over the VRAM settings that can be configured for the virtual machines in vSphere Client or the vSphere Web Client, unless you select the Manage using vSphere Client option.