Intel · Xeon Platinum · 2023 · LGA4677
The Intel Xeon Platinum 8558 is a server processor with 48 cores, released in 2023 at an MSRP of $4,650. It is part of the Xeon Platinum lineup, using the Xeon Scalable platform, and fits the LGA4677 socket. Internally, it is built on the "Emerald Rapids" architecture. Thanks to Intel Hyper-Threading, each core can handle two instruction streams simultaneously, yielding a total of 96 threads for improved parallelism. The Xeon Platinum 8558 has a base clock of 2.1 GHz and can boost up to 4 GHz depending on workload and thermal headroom. Intel manufactures the "Emerald Rapids" silicon on a Intel 7 process node. This processor supports DDR5 memory across 8 channels, up to 4TB total, with ECC support standard for data integrity in server workloads. It supports both single-socket (1P) and dual-socket (2P) configurations, with 80 lanes of PCIe 5.0 available for storage, networking and accelerators. With a TDP of 330W, the Xeon Platinum 8558 runs hot and requires a capable cooling setup. The cache hierarchy consists of no dedicated of L1, no dedicated of L2, and 260MB of L3 cache — a substantial cache pool well suited to memory-bound enterprise and virtualization workloads.
5th Gen Xeon Scalable 'Emerald Rapids' — drop-in compatible with Sapphire Rapids LGA4677 boards via BIOS update, with a significantly larger L3 cache.
| Brand | Intel |
|---|---|
| Family | Xeon Platinum |
| Series | Xeon Scalable |
| Architecture | Emerald Rapids |
| Codename | Emerald Rapids |
| Launch year | 2023 |
| Cores | 48 |
| Threads | 96 |
| Base clock | 2.1 GHz |
| Boost clock | 4 GHz |
| L3 cache | 260MB |
| TDP | 330W |
| Socket | LGA4677 |
| Process | Intel 7 |
| Memory type | DDR5 |
| Memory channels | 8 |
| Max memory | 4TB |
| PCIe lanes | 80 (PCIe 5.0) |
| ECC memory | Yes |
| Socket scalability | 1P and 2P |
| Launch MSRP | $4,650 |
| OEM / tray part number | PK8072205512300 |