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Intel Xeon E-2456 vs Intel Xeon Platinum 8558P: Comparison
Intel Xeon E-2456 and Intel Xeon Platinum 8558P separate most on l3 cache: Intel Xeon E-2456 at 18, Intel Xeon Platinum 8558P at 260, 93% in favour of Intel Xeon Platinum 8558P. Memory Channels splits them by another 75%, again favouring Intel Xeon Platinum 8558P. They match on 11 other specifications, including release year, market segment and socket status. In SPECrate® 2017 Integer (base), 1-chip the Intel Xeon Platinum 8558P scores 442 against 79.8 for the Intel Xeon E-2456, a lead of 82%.
Specs
| Specification |  |  |
|---|---|---|
| Form Factor | Desktop | Server & Enthusiast |
| Model Number | E-2456 | Platinum 8558P |
| Codename | Raptor Lake-E | Emerald Rapids |
| Release Year | 2023 | 2023 |
| TDP | 65 W | 350 W |
| iGPU | Intel UHD Graphics P750 | None |
| Market Segment | Server | Server |
| Socket | LGA1700 | LGA4677 |
| Socket Status | Current | Current |
| Process Node | 10 | 10 |
| Performance Cores | 6 | 48 |
| Efficiency Cores | 0 | 0 |
| SMT Enabled | Yes | Yes |
| P-Core Base Clock | 3.3 | 2.7 |
| P-Core Boost Clock | 5.1 | 4.0 |
| L3 Cache | 18-93% | 260 |
| Base Power | 80 | 350 |
| Memory Type | DDR5 | DDR5 |
| Max Memory Speed | 4800 | 5600 |
| Memory Channels | 2-75% | 8 |
| Max Memory Capacity | 128 | 4096 |
| ECC Support | Yes | Yes |
| Integrated Graphics | No | No |
| Copilot Plus Certified | No | No |
| PCIe Generation | PCIe 5.0 | PCIe 5.0 |
| PCIe Lanes | 20-75% | 80 |
| Cores | 6 | 48 |
| Threads | 12 | 96 |
Benchmarks
Measured results, not specifications. Percentages are the gap to the leading product in each test.
SPECrate® 2017 Integer (base), 1-chip
Best published 1-chip result on spec.org, retrieved 23 Sept 2026.
SPECrate 2017 Integer runs ten integer workloads, including a compiler, file compression, a chess engine and route planning, with one copy per hardware thread. The score is throughput against a fixed reference machine, so it reflects multi-core server and workstation work rather than gaming. Each figure is the best result a hardware vendor published on spec.org for a one-chip system, so the server, memory and compiler behind each chip differ.
SPECrate® 2017 Floating Point (base), 1-chip
Best published 1-chip result on spec.org, retrieved 23 Sept 2026.
SPECrate 2017 Floating Point runs thirteen scientific and engineering workloads, including weather and climate models, fluid dynamics, molecular dynamics and ray tracing, with one copy per hardware thread. It rewards core count, vector units and memory bandwidth, which is why server chips with many memory channels lead it. Each figure is the best result a hardware vendor published on spec.org for a one-chip system, so the server, memory and compiler behind each chip differ.
SPEC®, SPECrate® and SPECspeed® are registered trademarks of the Standard Performance Evaluation Corporation. Copied by permission of the Standard Performance Evaluation Corporation (SPEC). Results retrieved from www.spec.org on 23 Sept 2026.
Verdict
Intel Xeon E-2456
7.8 / 10 Expert Rating
The Intel Xeon E-2456 is a capable single-socket entry server chip, best for small deployments rather than heavy multi-socket workloads.
Intel Xeon Platinum 8558P
8.6 / 10 Expert Rating
The Intel Xeon Platinum 8558P is a top-tier data center chip, built for the heaviest multi-socket server and AI infrastructure workloads.