You can provision the Xeon 6700/6500 parts in 4-socket and eight-socket configurations, which weren't available using the top-end Xeon 6900 CPUs. That could give you a machine with 688 Redwood ...
The semiconductor giant discloses that its 288-core Xeon 6900E server CPU won’t be ‘broadly deployed’ through OEMs and will instead be targeted at cloud customers with custom chip needs ...