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Intel Xeon 6563P-B specifications and in-depth review

Intel Xeon 6563P-B

Manufacturer: Intel

The Intel Xeon 6563P-B is a high-core-count server processor aimed at enterprise environments that demand sustained computational throughput. Built on a 3 nm semiconductor process, it pairs 38 physical cores with 76 threads through multithreading support, operating at a base clock speed of 2.4 GHz per core with a turbo frequency reaching up to 4 GHz via Turbo Boost 2.0. The chip carries a thermal design power rating of 235 W and a maximum operating temperature of 85 °C.

On the memory side, the Xeon 6563P-B supports DDR5 at up to 6400 MHz across four memory channels, delivering a peak bandwidth of 204.8 GB/s and accommodating up to approximately 1130 GB of ECC-registered memory. Its cache hierarchy consists of 4256 KB of L1, 76 MB of L2 at 2 MB per core, and a substantial 152 MB of L3 cache at 4 MB per core. The processor supports PCIe 5.0 and includes instruction set extensions such as AVX, AVX2, FMA3, AES, SSE 4.1, SSE 4.2, F16C, and MMX, along with NX bit support. Integrated graphics are not present on this model.

Pros
  • With 38 cores and 76 threads, the processor can handle a large number of parallel tasks simultaneously, making it well suited for multi-threaded server workloads
  • The 152 MB of L3 cache, distributed at 4 MB per core, provides substantial on-die storage that helps reduce memory latency for data-intensive operations
  • DDR5 support with a maximum speed of 6400 MHz across four channels delivers a peak memory bandwidth of 204.8 GB/s, enabling fast data throughput for demanding applications
  • ECC memory support helps maintain data integrity by automatically detecting and correcting single-bit memory errors, which is essential in continuous server operation
  • The 3 nm manufacturing process contributes to a more compact transistor layout, which generally supports higher transistor density relative to older nodes
  • A broad instruction set including AES, AVX, AVX2, and FMA3 enables hardware-accelerated encryption and wide vector computation natively
Cons
  • A TDP of 235W places significant demands on server cooling infrastructure, requiring robust thermal management to sustain stable operation
  • The memory controller is limited to four channels, which may restrict bandwidth scaling in platforms that require higher channel counts for extreme throughput
  • No integrated graphics means a discrete GPU or dedicated management card is required for any display output, adding hardware dependencies in server builds
  • The clock multiplier is locked, so there is no option to adjust core frequencies beyond the factory-defined turbo ceiling of 4 GHz
  • With a maximum turbo frequency of 4 GHz, single-threaded peak speed is relatively modest for workloads that depend heavily on per-core clock rates
Who is this for?

This processor is well matched to enterprise server environments where sustained multi-threaded throughput is the primary demand. With 38 cores, 76 threads, and a large 152 MB L3 cache, it handles workloads such as database processing, virtualization hosts, and large-scale data analytics that benefit from high parallelism and generous on-die cache. Support for ECC memory up to 1130 GB makes it appropriate for mission-critical deployments where memory reliability and capacity are non-negotiable, while the AES and AVX2 instruction set extensions add native efficiency for encryption-heavy and vector-compute workloads.

Who is this NOT for?

This processor is not a practical fit for scenarios that depend on strong single-threaded clock performance, as its turbo ceiling of 4 GHz is modest for tasks like certain legacy enterprise applications or workloads with limited parallelism. The 235W TDP makes it unsuitable for thermally constrained or power-sensitive deployments where energy efficiency is a priority. It also lacks integrated graphics entirely, so any environment requiring direct display output without a discrete GPU — such as lightweight edge deployments or compact embedded server builds — would face an immediate hardware limitation.

General info:

Thermal Design Power (TDP) 235W
semiconductor size 3 nm
PCI Express (PCIe) version 5
Supports 64-bit ✓
CPU temperature 85 °C
Has integrated graphics ✕

The Intel Xeon 6563P-B carries a Thermal Design Power (TDP) of 235W and is rated for a maximum operating temperature of 85 °C, reflecting the thermal demands typical of a high-core-count server processor. It is built on a 3 nm semiconductor process and supports the 64-bit instruction set along with PCIe 5.0 connectivity. The processor does not include integrated graphics, making a discrete GPU a requirement for any display output in compatible server configurations.

Performance:

CPU speed 38 x 2.4 GHz
CPU threads 76 threads
turbo clock speed 4GHz
L3 cache 152 MB
L1 cache 4256 KB
L2 cache 76 MB
L2 core 2 MB/core
clock multiplier 24
Has an unlocked multiplier ✕
L3 core 4 MB/core
Turbo Boost version 2

The Intel Xeon 6563P-B features 38 cores running at a base clock speed of 2.4 GHz, with 76 threads enabled through multithreading and a turbo clock speed of up to 4 GHz via Turbo Boost 2.0. The clock multiplier is set at 24 and the multiplier is locked, meaning frequency adjustments through overclocking are not supported. In terms of cache, the processor is equipped with 4256 KB of L1, 76 MB of L2 at 2 MB per core, and a 152 MB L3 cache at 4 MB per core, providing a substantial on-die buffer well suited to latency-sensitive workloads running across its many cores.

Memory:

Supports ECC memory ✓
maximum memory bandwidth 204.8 GB/s
DDR memory version 5
RAM speed (max) 6400 MHz
maximum memory amount 1130GB
memory channels 4

The Intel Xeon 6563P-B supports DDR5 memory at speeds of up to 6400 MHz across four memory channels, yielding a peak bandwidth of 204.8 GB/s. It can address up to 1130 GB of total system memory and includes support for ECC (Error-Correcting Code) memory, which helps detect and correct single-bit memory errors — a standard requirement in server and enterprise deployments where data integrity is critical.

Features:

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

The Intel Xeon 6563P-B supports multithreading, allowing each physical core to handle two threads simultaneously for more efficient parallel workload execution. It includes the NX bit, a hardware-level security feature that helps prevent certain classes of malicious code from executing in memory regions designated as data. The processor also supports a broad range of instruction set extensions, including MMX, F16C, FMA3, AES, AVX, AVX2, SSE 4.1, and SSE 4.2, covering capabilities from legacy media instructions through to hardware-accelerated encryption and wide floating-point vector operations.

Benchmarks:

Final Verdict

The Intel Xeon 6563P-B is a purpose-built enterprise processor that makes a clear case for itself in environments where parallel workload capacity and memory subsystem strength are the defining requirements. Its combination of 38 cores, 76 threads, and a 152 MB L3 cache — backed by DDR5 support at up to 6400 MHz and ECC memory capacity reaching 1130 GB — positions it firmly as a data center-class component suited to virtualization, large-scale analytics, and encryption-intensive server roles. Users should be mindful of its thermal demands and the absence of integrated graphics, both of which require deliberate infrastructure planning. For workloads that align with its strengths, the Xeon 6563P-B represents a coherent and well-specified choice within the enterprise CPU segment.

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