Intel’s 144-core Sierra Forest and 64-core Emerald Rapids Xeon CPUs leak

Fuite des CPU Xeon à 144 cœurs Sierra Forest et 64 cœurs Emerald Rapids d'Intel

Intel's next-generation Xeon processors have been in the news for some time now. The Sapphire Rapids Refresh, Emerald Rapids, is expected to land in the second half of this year, followed by the cloud-centric Sierra Forest. After that, we have Granite Rapids, which features a complex chiplet design and extensive instruction support. With the kind permission of Yuuki_AnS, we have a detailed technical sheet for the three ranges.

Emerald Rapids has Golden Cove cores (the same as Sapphire Rapids) paired with a ton of L3 cache, 320MB compared to 112.5MB for higher variants. From four small chips on the Sapphire, Emerald reduces the number of chips to two, using the extra space to accommodate additional cache and four more cores. Base memory speed reaches 5,600MT/s with up to 4TB of octa-channel DDR5.

Emerald Rapids

The table above mainly includes 1S and 2S models with core counts ranging from 16 to 64. The CPUs have a base clock of around 2 GHz and a maximum boost of up to 4 GHz.

The Xeon 6th Gen Granite Rapids and Sierra Forest are all engineering samples. The Granite is composed of three compute dies and two I/O dies. The number of cores seems to cap at 2.5. The core count seems to cap at 56 cores, which corresponds to 20-core chiplets, about the same as the Sapphire Rapids. The maximum L3 cache has also been reduced, from 320 MB on Emerald to 288 MB on Granite Rapids.

Base DDR5 clocks have been increased to 6400MT/s with support for up to 8 channels. The base and boost clocks oscillate between 1.2 and 1.5 GHz and 2.6 GHz, respectively. These are preliminary samples, so these figures are likely to be revised upwards.

Sierra Forest will launch before Granite Rapids with up to 144 Crestmont “E” cores and 108 MB of L3 cache. Both ranges will be manufactured on the Intel 3/3nm node and will use the LGA4710 socket with a TDP of 350W. A release at the end of 2023 or beginning of 2024 is planned for these cloud offers.

Via: WCCFTech.