Intel Xeon Platinum 8558P

Name: Intel Xeon Platinum 8558P
Brand: Intel
SKU: 43362

Manufacturer: Intel

The Intel Xeon Platinum 8558P is a high-core-count server processor built for demanding enterprise environments that require substantial parallel processing capacity. It features 48 cores and 96 threads, with a base clock of 2.7GHz across all cores and a turbo frequency of up to 4GHz via Turbo Boost version 2. Manufactured on a 10nm process and rated at 350W TDP, it is clearly positioned for large-scale, thermally managed data center infrastructure rather than space- or power-constrained deployments.

On the memory side, the processor supports DDR5 across eight channels, with speeds reaching up to 5600MHz, a maximum capacity of 4000GB, and a peak bandwidth of 358.4GB/s — figures that reflect its orientation toward workloads with substantial memory throughput requirements. ECC memory is supported, and the bus transfer rate stands at 20 GT/s. The chip uses PCIe 5.0, is fully 64-bit compatible, and carries NX bit support for hardware-level execution protection. Its instruction set includes MMX, AVX, AVX2, FMA3, AES, F16C, SSE 4.1, and SSE 4.2, while the 260MB L3 cache — distributed at 5.42MB per core — provides a notably large on-die buffer. There is no integrated graphics unit on this processor.

Pros

96 threads across 48 cores enables a high degree of parallelism for concurrent enterprise workloads
Eight-channel DDR5 support with a 358.4 GB/s bandwidth ceiling accommodates extremely data-intensive server applications
Up to 4000GB of addressable memory provides substantial capacity for large in-memory workloads such as databases and virtualization
ECC memory support ensures hardware-level error correction, which is essential for maintaining data integrity in server environments
PCIe 5.0 interface enables high-bandwidth connectivity for modern enterprise storage and peripheral devices
A 260MB L3 cache distributed at 5.42MB per core offers a notably large on-die buffer that helps reduce memory latency under sustained load

Cons

A 350W TDP demands significant cooling infrastructure, limiting deployment to environments with robust thermal management
The locked clock multiplier removes any ability to adjust operating frequency beyond the fixed turbo ceiling
No integrated graphics unit is present, requiring a dedicated solution for any display output
The turbo frequency tops out at 4GHz, which may be insufficient for workloads with strong single-threaded frequency sensitivity
At a 2.7GHz base clock across 48 cores, tasks that cannot scale across many threads may see limited responsiveness

Who is this for?

The Intel Xeon Platinum 8558P is well-matched to large-scale data center and enterprise server environments where high core counts and sustained parallel throughput are central requirements. Its eight-channel DDR5 architecture, 4000GB memory ceiling, and 358.4GB/s bandwidth make it particularly suited to memory-intensive workloads such as in-memory databases, large-scale virtualization, and analytics platforms that depend on fast, reliable access to vast datasets. The inclusion of ECC memory support and NX bit protection further reinforces its fit for mission-critical deployments where data integrity and hardware-level security cannot be compromised.

Who is this NOT for?

This processor is a poor fit for environments where power consumption and thermal output are constrained, as its 350W TDP demands substantial cooling infrastructure that many smaller or edge deployments simply cannot accommodate. Workloads that rely primarily on single-threaded execution speed will find the 2.7GHz base clock and locked multiplier limiting, since there is no ability to tune frequency beyond what Turbo Boost provides. It is also unsuitable for any setup requiring onboard display output, given the complete absence of integrated graphics, making it impractical in environments where a discrete GPU cannot be incorporated into the system design.

General info:

Thermal Design Power (TDP)	350W
semiconductor size	10 nm
PCI Express (PCIe) version	5
Supports 64-bit	✓
CPU temperature	101 °C
Has integrated graphics	✕

The Intel Xeon Platinum 8558P carries a Thermal Design Power (TDP) of 350W, placing it firmly in the territory of high-load server hardware that requires robust cooling infrastructure. It is built on a 10nm semiconductor process and supports PCIe 5.0, enabling high-bandwidth connectivity for modern enterprise peripherals and storage solutions. The processor is fully 64-bit compatible and has a maximum operating temperature of 101°C. There is no integrated graphics unit included, so any display output would require a dedicated graphics solution.

Performance:

CPU speed	48 x 2.7 GHz
CPU threads	96 threads
turbo clock speed	4GHz
L3 cache	260 MB
clock multiplier	27
Has an unlocked multiplier	✕
L3 core	5.42 MB/core
Turbo Boost version	2

The processor features 48 cores running at a base clock of 2.7GHz each, yielding a total of 96 threads through multithreading support — a configuration suited to workloads that can distribute tasks across many concurrent execution paths. When conditions allow, Turbo Boost version 2 can push the frequency up to 4GHz, with a fixed clock multiplier of 27 that cannot be adjusted, as the multiplier is locked. The 260MB L3 cache, allocated at 5.42MB per core, provides a substantial on-die buffer that helps reduce memory latency for data-intensive processing tasks.

Memory:

Supports ECC memory	✓
maximum memory bandwidth	358.4 GB/s
DDR memory version	5
RAM speed (max)	5600 MHz
maximum memory amount	4000GB
memory channels	8
bus transfer rate	20 GT/s

The processor supports DDR5 memory across eight channels, with a maximum RAM speed of 5600MHz and a peak memory bandwidth of 358.4GB/s — figures that reflect the scale of throughput this platform is designed to sustain. It accommodates up to 4000GB of total system memory, providing extensive capacity for workloads that rely on large in-memory datasets. ECC memory support is included, ensuring hardware-level error detection and correction for environments where data integrity is critical. The bus transfer rate is rated at 20 GT/s, rounding out a memory subsystem oriented toward high-throughput enterprise workloads.

Features:

uses multithreading	✓
instruction sets	MMX, F16C, FMA3, AES, AVX, AVX2, SSE 4.1, SSE 4.2
Has NX bit	✓

The processor supports multithreading, enabling each physical core to handle two threads simultaneously, which is relevant for workloads that benefit from high levels of concurrency. Hardware-level security is covered through NX bit support, which assists in preventing unauthorized code execution at the silicon level. The supported instruction sets span MMX, F16C, FMA3, AES, AVX, and AVX2, along with SSE 4.1 and SSE 4.2 — collectively providing acceleration pathways for cryptographic operations, floating-point computation, and vectorized data processing tasks.

Benchmarks:

Final Verdict

The Intel Xeon Platinum 8558P is a processor built without compromise for large-scale enterprise infrastructure, where the demands of parallel processing, memory capacity, and data integrity converge. Its 48-core, 96-thread configuration paired with eight-channel DDR5 support and a 4000GB memory ceiling establishes it as a technically capable foundation for memory-intensive server workloads, in-memory databases, and demanding virtualization environments. The trade-offs — a 350W thermal envelope, locked multiplier, and no integrated graphics — are consistent with its purpose-built nature and are unlikely to concern operators deploying it within properly equipped data center infrastructure. For organizations whose workloads can fully leverage its parallel throughput and expansive memory subsystem, the Xeon Platinum 8558P represents a coherent and technically well-specified choice within the enterprise CPU segment.