The Super Micro SuperServer 8048B-TR4FT lists that it supports up to 12TB DDR4 ECC RAM (which could have 4xE7-8890v4 for 96 cores / 192 threads). Close to a commodity server, but probably doesn't quite count. Taking a wild guess on the price - $250k-$350k?
The SuperServer 7088B-TR4FT lists that it supports 24TB DDR4 ECC RAM (with 8xE78890v4 for 192 cores / 384 threads).
The SuperServer 7088B-TR4FT lists that it supports 24TB DDR4 ECC RAM (with 8xE78890v4 for 192 cores / 384 threads).