Rumors: Intel aiming for higher CPU core counts with its Sierra Forest, Granite Rapids-SP, and Granite Rapids-WS CPUs

Moore’s Law is Dead has published new Intel Xeon CPU rumours, highlighting the core counts of next-generation families such as Sierra Forest, Granite Rapids-SP, and Granite Rapids-WS. Moore’s Law is Dead’s latest YouTube video discusses three upcoming Xeon families. Granite Rapids-SP, Granite Rapids-WS, and Sierra Forest are among them. The Granite Rapids Xeon CPU family will use P-Cores, whereas the Sierra Forest will use E-Cores and is optimised for compute density.

Sierra Forest family Xeon CPUs will be power and performance optimised for high-density, ultra-efficient cloud computing. According to MLID, the Sierra Forest Xeon chips will have at least 344 cores packed into 4 Compute Tiles, with each tile containing 86 cores. Rumors also point to a 528-core variant, which could pack up to 132 cores per tile but will more likely get 512 cores because one cluster will be disabled.

Sierra Forest will compete with a variety of compute-optimized AMD EPYC parts, including the upcoming Bergamo with 128 Zen 4C cores, and Falcon Shores will compete with custom Instinct APU accelerators, beginning with the upcoming MI300 accelerator later this year.

The Intel Sierra Forest family will be available in 2024 and will use the ‘Intel 3’ process node.

The Granite Rapids-SP Xeon CPUs will be based on the ‘Intel 3’ process node, according to Intel (Formely 5nm EUV). The lineup is expected to launch between 2023 and 2024, with Emerald Rapids serving as an intermediary solution rather than a true Xeon family replacement.

Granite Rapids-SP Xeon chips will use the Redwood Cove+ core architecture and have increased IPC of 15-25%, according to rumours. During its ‘Accelerated’ keynote, Intel teased a high-level overview of its Granite Rapids-SP CPU, which featured three compute tiles and two I/O dies at the top and sections of the interposer.

The Sapphire Rapids-WS (Workstation) lineup will be based on the Granite Rapids DNA and will use two of the three titles for a maximum of 88 cores, though only 86 cores are expected to be available, if at all. The Granite Rapids-WS CPU family, like AMD’s Threadripper CPU family, will have a single I/O die. In terms of memory, the workstation CPUs may be limited to a 6-channel DDR5 memory controller.

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