Intel Xeon Platinum 8558U
Expert rating8.6 / 10
- Brand:
- Intel
- Form Factor:
- Server & Enthusiast
- CPU Socket:
- LGA 4677
- Core/Thread Count:
- 48C/96T
- TDP:
- 300W
- iGPU:
- None
- CPU Series:
- Xeon Platinum
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Manufacturer: Intel Last updated: 2026-09-12
Intel Xeon Platinum 8558U Review
Intel Xeon Platinum 8558U 48-core 96-thread server processor, 2.0GHz base / 3.7GHz boost, 300W TDP, Emerald Rapids, LGA 4677 socket
The Intel Xeon Platinum 8558U is a top-tier data center processor for the most demanding multi-socket server and AI infrastructure deployments. It pairs 48 cores and 96 threads with a 2.0GHz base clock that boosts up to 3.7GHz and None graphics, all within a 300W envelope.
Performance and Architecture
With 48 cores and 96 threads, the Intel Xeon Platinum 8558U runs a 2.0GHz base clock that boosts up to 3.7GHz, backed by 260MB of L3 cache and None graphics on the Emerald Rapids architecture.
Platform and Deployment
The Intel Xeon Platinum 8558U uses the LGA 4677 platform in a 300W envelope, positioned as a top-tier data center processor for the most demanding multi-socket server and AI infrastructure deployments..
Comparison to Alternatives
Within the Xeon Platinum lineup in this catalog, the Intel Xeon Platinum 8558U sits at the 48-core tier, differentiated mainly by clock speed, TDP, and socket from its closest siblings. Against AMD's EPYC processors in this catalog at a similar tier, the Intel Xeon Platinum 8558U competes on platform ecosystem and per-core efficiency, while against Intel's own Xeon 6 (Granite/Sierra Rapids) parts in this catalog it occupies a narrower, more specialized deployment niche.
Specifications
Identity
| Product Line | Xeon |
|---|---|
| Model Number | Platinum 8558U |
| Codename | Emerald Rapids |
| Release Year | 2023 |
Segment and platform
| Market Segment | Server |
|---|---|
| Microarchitecture | Emerald Rapids |
| Socket | LGA4677 |
| Socket Status | Current |
| Process Node | 10 nm |
Core configuration
| Total Cores | 48 |
|---|---|
| Performance Cores | 48 |
| Efficiency Cores | 0 |
| Total Threads | 96 |
| SMT Enabled | Yes |
Clock speeds
| P-Core Base Clock | 2.0 GHz |
|---|---|
| P-Core Boost Clock | 4.0 GHz |
Cache
| L3 Cache | 260 MB |
|---|
Power and thermal
| Base Power | 300 W |
|---|
Memory
| Memory Type | DDR5 |
|---|---|
| Max Memory Speed | 4800 MT/s |
| Memory Channels | 8 |
| Max Memory Capacity | 4096 GB |
| ECC Support | Yes |
Graphics and AI
| Integrated Graphics | No |
|---|---|
| Copilot Plus Certified | No |
Expansion
| PCIe Generation | PCIe 5.0 |
|---|---|
| PCIe Lanes | 80 |
| Form Factor | Server & Enthusiast |
|---|---|
| TDP | 300 W |
| iGPU | None |
Measured results
SPEC CPU 2017
Best published result on spec.org as of 23 Sept 2026.
| SPECrate® 2017 Integer (base) | 433 |
Cores 48 · Tested in ASUS RS720-E11-RS12U (2.00 GHz, Intel Xeon Platinum 8558U) · Published by ASUSTeK Computer Inc., Jun-2024
Full disclosure on spec.org| SPECrate® 2017 Floating Point (base) | 520 |
Cores 48 · Tested in ASUS RS720-E11-RS12U (2.00 GHz, Intel Xeon Platinum 8558U) · Published by ASUSTeK Computer Inc., Jun-2024
Full disclosure on spec.orgSPEC®, 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.
Expert Review
Reviewed by Burooj Alam. Rated by us, not by users.
Expert rating8.6 / 10
The Intel Xeon Platinum 8558U is a top-tier data center chip, built for the heaviest multi-socket server and AI infrastructure workloads.
Best for
- Multi-socket data centers
- AI training infrastructure
- Large-scale virtualization
Not for
- Single-socket small business servers
- Desktop use
- Battery-powered devices
FAQs
What are the key specifications of the Intel Xeon Platinum 8558U?
The Intel Xeon Platinum 8558U is a processor from Intel. Key specs: Cores 48, Threads 96, Base Clock 2.0 GHz, Boost Clock 3.7 GHz, L3 Cache 260.
Will the Intel Xeon Platinum 8558U work with my current setup?
The Intel Xeon Platinum 8558U lists Socket is LGA 4677. Check that against the hardware you already own before buying, since this is the field that most often decides whether a part fits.
Who is the Intel Xeon Platinum 8558U best suited to?
It suits multi-socket data centers, ai training infrastructure, large-scale virtualization.
What are the drawbacks of the Intel Xeon Platinum 8558U?
It is a poor fit for single-socket small business servers, desktop use, battery-powered devices.