The type of memory on the motherboard and the type of memory on a graphics card have no direct relationship. The memory on the motherboard is determined by the CPU/motherboard. The type on the graphics card is determined by the graphics card maker depending on how much performance and how low a price they want.
The type of memory on the motherboard and the type of memory on a graphics card have no direct relationship. The memory on the motherboard is determined by the CPU/motherboard. The type on the graphics card is determined by the graphics card maker depending on how much performance and how low a price they want.