Intel at the 2023 InnovatiON event unveiled a 288-core extreme core-count variant of the Xeon "Sierra Forest" processor for high-density servers for scale-out, cloud-native environments. It succeeds the current 144-core model. "Sierra Forest" is a server processor based entirely on efficiency cores, or E-cores, based on the "Sierra Glen" core microarchitecture, a server-grade derivative of "Crestmont," Intel's second-generation E-core that's making a client debut with "Meteor Lake."

Xeon "Sierra Forest" is a chiplet-based processor, much like "Meteor Lake" and the upcoming "Emerald Rapids" server processor. It features a total of five tiles—two Compute tiles, two I/O tiles, and a base tile (interposer). Each of the two Compute tiles is built on the Intel 3 foundry node, a more advanced node than Intel 4, featuring higher-density libraries, and an undisclosed performance/Watt increase. Each tile has 36 "Sierra Glen" E-core clusters, 108 MB of shared L3 cache, 6-channel (12 sub-channel) DDR5 memory controllers, and Foveros tile-to-tile interfaces.