The lane issue is why there is this push for GPUDirect, the bulk memory transfer goes through the nic that is closest to the GPU and straight to the GPU DRAM wi

The lane issue is why there is this push for GPUDirect, the bulk memory transfer goes through the nic that is closest to the GPU and straight to the GPU DRAM without the need to cross through the CPUs limited lanes. In my experience, this works rather nicely.