Intel’s next-gen Xeon processors have been in the news for quite some time now. The Sapphire Rapids Refresh, Emerald Rapids, is expected to land in the latter half of this year, followed by the Cloud-centric Sierra Forest. Post that, and we’ve got Granite Rapids, featuring a complex chiplet design and expanded instruction support. Courtesy of Yuuki_AnS, we’ve got a detailed specs sheet of the three lineups.
Emerald Rapids features Golden Cove cores (same as Sapphire Rapids) paired with a ton of L3 cache, 320MB vs. 112.5MB on the top variants. From four small chiplets on Sapphire, Emerald reduces the die count to two, using the additional space to fit the additional cache plus four more cores. The stock memory speed tops at 5,600MT/s with up to 4TB of octa-channel DDR5.
The above chart mainly includes 1S and 2S models with core counts ranging from 16 to 64. The CPUs have a base clock of around 2GHz and a max boost of up to 4GHz.
The 6th Gen Xeon Granite Rapids and Sierra Forest parts are all Engineering Samples. Granite is composed of three compute dies, and two I/O dies. The core count seems to max out at 56 cores, indicating 20 core chiplets, roughly the same as Sapphire Rapids. The max L3 cache has also been reduced from 320MB on Emerald to 288MB on Granite Rapids.
The stock DDR5 clocks have been raised to 6,400MT/s with support for up to 8 channels. The base and boost clocks hover between 1.2 to 1.5GHz and 2.6GHz, respectively. These are early samples, so these numbers are bound to go up.
Sierra Forest will launch ahead of Granite Rapids with up to 144 Crestmont “E” cores and 108MB of L3 cache. Both lineups will be fabbed on the Intel 3/3nm node and leverage the LGA4710 socket with a TDP of 350W. A late 2023 or early 2024 release is planned for these cloud offerings.