# Intel Xeon Platinum 8558U Server CPU: Intel Also called intel xeon platinum 8558u, xeon platinum 8558u, 8558u, xeon-platinum-8558u Intel, Server CPU, Emerald Rapids Intel Xeon Platinum server processor on Emerald Rapids, with 48 cores and 96 threads and 260 MB L3 at 300 W TDP addressing up to 4 GB and no integrated graphics. ## What you need to know Still a capable Xeon Platinum desktop chip. Intel Xeon Platinum 8558U launched in October 1, 2023., It has 48 cores and 96 threads on Emerald Rapids, dropping into the FCLGA4677 socket. It is no longer the newest SKU in every store, but the chip is still useful when the rest of the PC keeps up. - **Still good?**: Yes, for most work this class is sold for **Product age**: 2 years old **Upgrade pressure**: Low Feex says This SKU has no picture of its own. If the machine has no discrete GPU, a black screen after install is expected, not a dead CPU. ## What this hardware means today Age and usefulness are not the same number. This page keeps them separate. - **Performance today**: **Excellent.** Excellent for the class when RAM, storage, and the GPU keep up. **Product age 2 years old**: **Previous generation.** Launched October 1, 2023. Newer platforms exist. That does not make this chip unusable by itself. **Support status **: **Supported.** Current Windows and current applications still run on this class of CPU. Platform BIOS support depends on the motherboard or laptop vendor. **Upgrade pressure **: **Low.** Upgrade pressure is low unless you need a different platform feature. ## Where does it sit? Emerald Rapids sits on Intel's recent Core timeline. Later desktop branding moved toward Core Ultra. 11th Gen 12th Gen 13th Gen 14th Gen Core Ultra ## Performance context These are qualitative readings, not a fake 8.7 out of 10. Workload still wins. ### Gaming: Poor fit Not the job. Use a desktop or workstation part if games are the point. ### Productivity: Excellent 48 cores cover office, browser, and compile work in this class. ### Multithreaded workloads: Very Good 96 threads. Heavy encodes still scale further on higher-core parts. ### General use: Excellent Everyday Windows use is not where most people notice this SKU first. ### Efficiency: Average Rated 300 W base power. That is a platform number, not a promise about your cooler. ## Should you upgrade? Probably not if this chip already matches your work. ### Upgrade makes more sense if - Your workload is strongly CPU limited - You need a newer platform for memory, I/O, or chipset features - You need substantially more multicore performance - You need newer connectivity that your current board cannot offer ### Upgrade makes less sense if - The GPU is the real bottleneck - Current applications are already responsive - The CPU rarely limits your workload ## Specifications Figures below follow the Feex Hardware Database record for this SKU. Fields without a recorded value are omitted. ### Processor Intel Xeon Platinum 8558U is built on Emerald Rapids. | Manufacturer | Intel | | ------------ | -------------------------------------- | | Family | Xeon Platinum | | Architecture | Emerald Rapids | | Generation | 5th Gen Intel Xeon Scalable Processors | | Segment | Server | ### Cores and threads Intel Xeon Platinum 8558U has 48 cores and 96 threads. | Cores | 48 | | ------- | -- | | Threads | 96 | ### Clock speeds Base clock is 2.0 GHz. Boost reaches 4.0 GHz. | Base frequency | 2.0 GHz | | -------------- | ------- | | Max boost | 4.0 GHz | ### Cache Cache on this sheet is 260 MB L3. | L3 cache | 260 MB | | ----------- | ------ | | Total cache | 260 MB | ### Memory Intel Xeon Platinum 8558U addresses 4 GB across 8 memory channels. | Supported types | DDR5 | | --------------- | ---- | | Max capacity | 4 GB | | Channels | 8 | ### Package and power Intel Xeon Platinum 8558U uses the FCLGA4677 socket and a 300 W TDP. | Socket | FCLGA4677 | | ------ | ---------------------- | | TDP | 300 W | | PCIe | Revision 5.0, 80 lanes | ### Integrated graphics Intel Xeon Platinum 8558U does not include integrated graphics. | Integrated graphics | None | | ------------------- | ---- | ### Market Intel Xeon Platinum 8558U launched October 1, 2023 at USD 4166 (suggested price at launch). | Launch date | October 1, 2023 | | ----------- | ------------------------------------ | | Launch MSRP | USD 4166 (suggested price at launch) | | Model | 8558U | ### Features Intel Xeon Platinum 8558U records 10 instruction sets on this sheet. | Instruction sets | AES-NIAMXAVX-512AVX2AVXAVX-VNNIFMASHA64-bit (x86-64)SSE4.2 | | ---------------- | ------------------------------------------------------------------------------------------------------------------ | | Security | Control-flow Enforcement (CET)Execute Disable (NX)Boot GuardOS GuardSGXTrusted ExecutionMode-Based Execute Control | | Virtualization | Extended Page Tables (EPT)VT-d (DMA Remapping)VT-x (Hardware Virtualization) | | AI acceleration | AMX (Advanced Matrix Extensions)Deep Learning Boost | ## Compatibility | Socket | FCLGA4677 | | -------- | ------------------------------------------------------------------------------------------------- | | Board | A shared socket is not automatic compatibility. Check the motherboard CPU list and BIOS revision. | | Memory | DDR5, up to 4 GB | | Graphics | Requires a discrete GPU. This SKU has no iGPU. | A shared socket is not automatic compatibility. Boards often need a BIOS update before a newer chip in the same socket will post. Cooler clearance, VRM quality, and power limits matter as much as the socket name. Do not expect a display from the motherboard video ports. This SKU has no integrated graphics. ### No display after install This SKU has no integrated graphics. A machine with no discrete GPU will not show a picture. That is expected, not a dead CPU. ## Related These entities connect to this article. Type is shown on every link. [Processors: Hardware](https://feex.it/wiki/hardware/cpu) ## Sources and verification Reviewed by Feex editorial. Last verified August 2026 Status: Partially Verified. [How we research](https://feex.it/wiki/research). - [Feex Hardware Database ](https://foxhole.feex.it/cpu/intel-xeon-platinum-8558u)ยท Specification source used for this sheet. CC BY 4.0. ## Was this article useful? A yes or no is enough. Pick a reason if you want, or add a short note. Quick facts The short identity of this page. Specs, sources, and the full story stay in the article. - **Manufacturer**: Intel **Family**: Xeon Platinum **Architecture**: Emerald Rapids **Socket**: FCLGA4677 **Launch**: 2023 **Status**: Previous generation, still capable Partially Verified: Last verified August 2026 --- Source: [Canonical Feex Wiki page](https://feex.it/wiki/hardware/cpu/intel-xeon-platinum-8558u/) [Developer guide](https://feex.it/wiki/developers/) | [API policy](https://feex.it/developers/api-policy/) | [Agent guidance](https://feex.it/wiki/llms.txt)