For most Intel integrated GPUs, VRAM is dynamic. It uses your system's RAM as needed (up to 50%). However, many games check for a "Dedicated Video Memory" value, which Windows often defaults to reporting as a low amount (e.g., 128MB), causing games like GTA V or NBA 2K to crash or show errors.
: The key is usually created at HKEY_LOCAL_MACHINE\SOFTWARE\Intel\GMM .
The "2048" value in this registry hack tells the system to report of dedicated VRAM. How the Registry Hack Works