So how exactly (in the technical sense) is this more energy efficient than both PCIe and Infiniband (which seems to be a claim somewhere too, together with the

So how exactly (in the technical sense) is this more energy efficient than both PCIe and Infiniband (which seems to be a claim somewhere too, together with the added bandwidth)? EDIT: so the whitepaper is surprisingly good for that (somehow all the articles are very weird...): https://resources.nvidia.com/en-us-grace-cpu/nvidia-grace-hopper https://resources.nvidia.com/en-us-grace-cpu/nvidia-grace-ho... - essentially they connect the GPUs with NVlink instead of PCIe (so, vertical integrators heaven) and then NVLink forms a separate interconnect for GPUs. So this is cool and essentially what Fujitsu, Google, ... have done for some time. A fun thing is, that they like to add up their nvlink-duplex bandwith and don't do for PCIe... (which then suddenly would have the same bandwith as the GPU-side). Still very cool to see the mainframe come back alive ... (it's a bit sad they bought Mellanox - monopolies are sad...)