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Intel Xeon 6516P-B specifications and in-depth review

Intel Xeon 6516P-B

Manufacturer: Intel

The Intel Xeon 6516P-B is an enterprise-grade processor designed for high-performance computing tasks. With a base clock speed of 2.3 GHz across 20 cores, it offers impressive computational power. Its 145W TDP ensures stability under demanding workloads while maintaining efficient thermal performance.

This processor supports a wide range of advanced features, including support for ECC memory and DDR5 with a maximum RAM speed of 4800 MHz. It has 40 threads, a 3.5 GHz turbo boost, and a large L3 cache of 80 MB, making it suitable for complex data-driven environments and demanding server applications.

Pros
  • Supports ECC memory for enhanced data integrity and reliability, making it suitable for mission-critical tasks.
  • Equipped with a high 80 MB L3 cache for efficient data handling in memory-intensive workloads.
  • Offers 4 memory channels for better bandwidth, improving overall memory performance in multi-tasking environments.
Cons
  • Lacks integrated graphics, which may require a separate GPU for certain tasks or workloads.
  • Does not have an unlocked multiplier, limiting overclocking potential for users seeking to maximize performance.
  • Maximum CPU temperature of 85°C may limit thermal headroom for heavy workloads without adequate cooling.
Who is this for?

The Intel Xeon 6516P-B is ideal for enterprise environments requiring high-performance processing. Its 40 threads and support for ECC memory make it a strong choice for mission-critical applications, where data integrity and efficient multitasking are essential. The large 80 MB L3 cache and robust memory capabilities with DDR5 support also make it well-suited for data-heavy workloads such as server operations, scientific computing, or virtualization.

Who is this NOT for?

This processor may not be the best choice for environments where integrated graphics are required, as it lacks integrated graphics. Additionally, users seeking to push the performance limits through overclocking may find the absence of an unlocked multiplier limiting. Furthermore, its 85°C CPU temperature cap might present thermal challenges in very dense or high-performance setups without proper cooling solutions.

General info:

Thermal Design Power (TDP) 145W
release date February 2025
semiconductor size 3 nm
PCI Express (PCIe) version 5
Supports 64-bit ✓
CPU temperature 85 °C
Has integrated graphics ✕

The Intel Xeon 6516P-B features a 145W thermal design power (TDP), balancing power consumption and performance. Its 3 nm semiconductor size enhances efficiency and speed, while the processor supports PCIe version 5 for high-speed data transfer. It operates at a maximum CPU temperature of 85°C and supports 64-bit computing. Notably, this processor does not include integrated graphics.

Performance:

CPU speed 20 x 2.3 GHz
CPU threads 40 threads
turbo clock speed 3.5GHz
L3 cache 80 MB
L1 cache 2240 KB
L2 cache 40 MB
L2 core 2 MB/core
clock multiplier 23
Has an unlocked multiplier ✕
L3 core 4 MB/core
Turbo Boost version 2

The Intel Xeon 6516P-B offers a base CPU speed of 20 x 2.3 GHz, supporting up to 40 threads for multitasking. It is equipped with a large 80 MB L3 cache and additional L1 and L2 caches of 2240 KB and 40 MB, respectively. With a turbo boost clock speed of 3.5 GHz, this processor enhances performance under demanding conditions, although it does not feature an unlocked multiplier.

Memory:

Supports ECC memory ✓
DDR memory version 5
RAM speed (max) 4800 MHz
maximum memory amount 1130GB
memory channels 4

The Intel Xeon 6516P-B supports ECC memory for improved reliability and data integrity. It utilizes DDR5 memory with a maximum RAM speed of 4800 MHz and supports up to 1130GB of memory. With 4 memory channels, it enables efficient data processing for memory-intensive workloads.

Features:

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

The Intel Xeon 6516P-B utilizes multithreading to enhance performance across multiple tasks simultaneously. It supports a wide range of instruction sets including MMX, AES, AVX, and SSE 4.2, ensuring compatibility with modern software and computational needs. Additionally, it features the NX bit for improved security by preventing the execution of malicious code.

Benchmarks:

Final Verdict

The Intel Xeon 6516P-B is a powerful enterprise CPU designed for demanding workloads, offering impressive features like ECC memory support and a substantial 80 MB L3 cache. With 40 threads and robust memory capabilities, it excels in multitasking and data-heavy environments. While it lacks integrated graphics and overclocking potential, its performance and reliability make it a strong choice for server operations and scientific computing. Overall, it is well-suited for professionals needing a high-performance processor with solid data integrity features.

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