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Intel Xeon Platinum 8558P vs Intel Xeon Platinum 8558U: Comparison
Intel Xeon Platinum 8558P and Intel Xeon Platinum 8558U differ on max memory speed: Intel Xeon Platinum 8558P at 5600, Intel Xeon Platinum 8558U at 4800, which puts Intel Xeon Platinum 8558P ahead on that measure. They match on 25 other specifications, including product line, form factor and codename. In SPECrate® 2017 Integer (base), 1-chip the Intel Xeon Platinum 8558P scores 442 against 433 for the Intel Xeon Platinum 8558U, a lead of 2%.
Specs
| Specification |  | |
|---|---|---|
| Product Line | Xeon | Xeon |
| Form Factor | Server & Enthusiast | Server & Enthusiast |
| Model Number | Platinum 8558P | Platinum 8558U |
| Codename | Emerald Rapids | Emerald Rapids |
| Release Year | 2023 | 2023 |
| TDP | 350 W | 300 W |
| iGPU | None | None |
| Market Segment | Server | Server |
| Socket | LGA4677 | LGA4677 |
| Socket Status | Current | Current |
| Process Node | 10 | 10 |
| Performance Cores | 48 | 48 |
| Efficiency Cores | 0 | 0 |
| SMT Enabled | Yes | Yes |
| P-Core Base Clock | 2.7 | 2.0 |
| P-Core Boost Clock | 4.0 | 4.0 |
| L3 Cache | 260 | 260 |
| Base Power | 350 | 300 |
| Memory Type | DDR5 | DDR5 |
| Max Memory Speed | 5600 | 4800 |
| Memory Channels | 8 | 8 |
| Max Memory Capacity | 4096 | 4096 |
| ECC Support | Yes | Yes |
| Integrated Graphics | No | No |
| Copilot Plus Certified | No | No |
| PCIe Generation | PCIe 5.0 | PCIe 5.0 |
| PCIe Lanes | 80 | 80 |
| Cores | 48 | 48 |
| Threads | 96 | 96 |
| Architecture | Emerald Rapids | Emerald Rapids |
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 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.
Intel Xeon Platinum 8558U
8.6 / 10 Expert Rating
The Intel Xeon Platinum 8558U is a top-tier data center chip, built for the heaviest multi-socket server and AI infrastructure workloads.
More comparisons in Processors (CPUs)
- Intel Xeon Platinum 8558P vs Intel Xeon Platinum 8570
- AMD 6th Gen A10-8700P APU vs Intel Xeon Platinum 8558P
- AMD 6th Gen A10-8700P APU vs Intel Xeon Platinum 8558U
- Intel Xeon Platinum 8558P vs Intel Xeon Silver 4510
- Intel Xeon E-2468 vs Intel Xeon Platinum 8558U
- Intel Xeon Platinum 8558U vs Intel Xeon Platinum 8580