DDR5 is far slower than GPU VRAM. If anything, the higher-bandwidths of future PCIe-specs would allow the CPU to access the dedicated GPU VRAM at its full spee

DDR5 is far slower than GPU VRAM. If anything, the higher-bandwidths of future PCIe-specs would allow the CPU to access the dedicated GPU VRAM at its full speed, rather than PCIe-limited speeds.