In a SoC (all phones) and most laptops with "integrated graphics", that's the way it works. Basically a multi-processor system with shared memory. It is actuall

In a SoC (all phones) and most laptops with "integrated graphics", that's the way it works. Basically a multi-processor system with shared memory. It is actually more common in the wild than the PCIe model, where the GPU has dedicated memory.