I posted some experiments I did with diffusion models (Wan 2.2 specifically) with both cards at Looks like NVIDIA GB300-based workstations are starting to hit the market - #8 by brandon.c
I saw around 16% faster performance on the 600W card vs a Max-Q pushed a little harder than boot up settings. (Max-Q can be set to 325W via nvidia-smi FYI)