Only G5 is connected directly to the CPU, all others, chipset.
Yea, but someone struggling with the whole concept of limited PCIe lanes and bandwidth impact when connecting NVMe drive, I figured the whole direct to CPU vs chipset distinction was a step too far (more confusing & generate questions, than lead to understanding)
My thinking was that from a impact, considerations, and mitigations of from connecting NVME drive in shared bandwidth slot with GPU, whether those slots direct to CPU or chipset really isn't relevant to this specific discussion.