This looks like a very cool high end x86 workstation. CPU alone is $12000 retail.
Theres a few potential “problems” I see with it - main system RAM is about 30-40x slower than that of the GPU’s and you will have PCI-e as a bottleneck getting working data to or between the GPUs.
In practice is the 400-500GB/s main memory limiting some use cases, or is the PCI-E bus the main issue with these types of systems?