Quick glance to the article "There are 24 DIMM slots and you can use LRDIMMs". 64GB dimms at least seem to be available, some news from 2015 also mentioned 128G

Quick glance to the article "There are 24 DIMM slots and you can use LRDIMMs". 64GB dimms at least seem to be available, some news from 2015 also mentioned 128GB dimm from Samsung.