Intel Xeon 6521P
Intel processor specifications and benchmark scores
ECC MemoryAt a Glance
IntelIntel Xeon 6521P Specifications
Xeon 6521P Core Configuration
Processing cores and threading
The Intel Xeon 6521P features 24 physical cores and 48 threads, which directly impacts multi-threaded performance in CPU benchmarks. More cores allow the processor to handle parallel workloads efficiently, improving performance in video editing, 3D rendering, and multitasking scenarios. Thread count determines how many simultaneous tasks the CPU can process, with higher thread counts benefiting productivity applications and content creation workflows.
6521P Clock Speeds
Base and boost frequencies
Clock speed is a critical factor in Xeon 6521P benchmark performance, measured in GHz. The base clock represents the guaranteed operating frequency, while the boost clock indicates maximum single-core performance under optimal conditions. Higher clock speeds translate to faster single-threaded performance, which is essential for gaming and applications that don't fully utilize multiple cores. The Xeon 6521P by Intel can dynamically adjust its frequency based on workload and thermal headroom.
Intel's Xeon 6521P Cache Hierarchy
L1, L2, L3 cache sizes
Cache memory is ultra-fast storage built directly into the 6521P processor die. L1 cache provides the fastest access for frequently used data, while L2 and L3 caches offer progressively larger storage with slightly higher latency. Larger cache sizes significantly improve CPU benchmark scores by reducing memory access times. The Xeon 6521P's cache configuration is optimized for both gaming performance and productivity workloads, minimizing data fetch delays during intensive computations.
Granite Rapids Architecture & Process
Manufacturing and design details
The Intel Xeon 6521P is built on Intel's 5 nm manufacturing process, which determines power efficiency and thermal characteristics. Smaller process nodes allow for more transistors in the same space, enabling higher performance per watt. The architecture defines how the processor handles instructions and manages data flow, directly impacting benchmark results across different workload types. Modern CPU architectures like the one in 6521P incorporate advanced branch prediction and out-of-order execution for optimal performance.
Granite Rapids Instruction Set Features
Supported CPU instructions and extensions
The Xeon 6521P by Intel supports various instruction set extensions that enable optimized performance for specific workloads. SIMD instructions like SSE and AVX accelerate multimedia, scientific computing, and AI workloads by processing multiple data points simultaneously. Features like AES-NI provide hardware-accelerated encryption, while AVX-512 (if supported) enables advanced vector processing for data centers and high-performance computing. These instruction sets are critical for software compatibility and performance in modern applications.
Power & Thermal
TDP and power specifications
The Intel Xeon 6521P has a TDP (Thermal Design Power) of 225W, indicating the cooling solution required for sustained operation. TDP affects both system power consumption and the type of cooler needed. Lower TDP processors are ideal for compact builds and laptops, while higher TDP chips typically offer better sustained performance in demanding CPU benchmarks. Understanding power requirements helps ensure your system can deliver consistent performance without thermal throttling.
Intel Socket 4710 Platform & Socket
Compatibility information
The Xeon 6521P uses the Intel Socket 4710 socket, which determines motherboard compatibility. Choosing the right platform is essential for building a system around this processor. The socket type also influences available features like PCIe lanes, memory support, and upgrade paths. When comparing CPU benchmarks, ensure you're looking at processors compatible with your existing or planned motherboard to make informed purchasing decisions.
Intel Socket 4710 Memory Support
RAM compatibility and speeds
Memory support specifications for the 6521P define which RAM types and speeds are compatible. Faster memory can significantly improve CPU benchmark performance, especially in memory-intensive applications and gaming. The memory controller integrated into the Xeon 6521P determines maximum supported speeds and channels. Dual-channel or quad-channel memory configurations can double or quadruple memory bandwidth, providing noticeable performance gains in content creation and scientific workloads.
Product Information
Release and pricing details
The Intel Xeon 6521P is manufactured by Intel and represents their commitment to delivering competitive CPU performance. Understanding the release date and pricing helps contextualize benchmark comparisons with other processors from the same generation. Launch pricing provides a baseline for evaluating value, though street prices often differ. Whether you're building a new system or upgrading, the Xeon 6521P by Intel offers a specific balance of performance, features, and cost within Intel's product lineup.
About Intel Xeon 6521P
The Intel Xeon 6521P is a 24-core, 48-thread server processor from the Granite Rapids-SP generation, released on 2025-02-23. It ranks in the 98th percentile of all CPUs, with an average benchmark score of 92161. Against its nearest rivals, it is effectively a dead heat with one AMD EPYC part, slightly behind two others, and ahead of a flagship desktop chip.
Benchmark Performance
The Xeon 6521P delivers a Cinebench R23 multi-core score of 49274 and a single-core score of 6956. In R20, it scores 20695 multi-core and 2921 single-core; in R15, 4966 multi-core and 701 single-core. These numbers show strong scaling: the multi-core score is roughly seven times the single-core score, consistent with 24 physical cores and 48 threads.
Passmark results reinforce the picture. The multithread score is 57970, while the single-thread score is 2829. Integer math reaches 214076, floating-point math 155294, and data compression 840355. Data encryption scores 47452, extended instructions 57751, and random string sorting 98119. The physics test yields 4105, and find prime numbers 437.
Relative to rivals, the Xeon's average score of 92161 is 0.3% below the AMD EPYC 9175F (92399), 1.6% below the Intel Core Ultra 9 285K (93672), and 3.8% below the AMD EPYC 4565P (95820). It is 2.7% above the Intel Core i9-14900KS (89701). The Xeon is therefore not the outright leader in its comparison group, but it is within a few percent of the top.
Who Should Consider It
This processor targets the Server/Workstation market segment. Its 24 cores and 48 threads make it well suited for heavily threaded workloads such as rendering, simulation, and data processing. The Cinebench R23 multi-core score of 49274 indicates strong performance in CPU-bound creation tasks, while the Passmark data compression score of 840355 suggests efficient handling of archive and storage workloads.
For data encryption workloads, the 47452 score is notable for server environments that handle secure communications. The extended instructions score of 57751 points to good support for vectorized and cryptographic instruction sets. Single-threaded performance, while not the primary focus, is still competitive: a Passmark single-thread score of 2829 and a Cinebench R23 single-core score of 6956 mean that lightly threaded applications will not be a bottleneck.
For office and general productivity, the integer math score of 214076 and random string sorting score of 98119 indicate strong throughput in data-heavy office tasks. Gamers are unlikely to choose this part, as it is a server processor, but the 98th percentile ranking means it outperforms the vast majority of CPUs in the database.
How It Compares
AMD EPYC 9175F: The Xeon 6521P trails the EPYC 9175F by just 0.3% in average score (92161 vs 92399). This is a statistical tie; the two processors are effectively equivalent in overall performance.
Intel Core Ultra 9 285K: The Xeon is 1.6% behind the Core Ultra 9 285K (93672). The desktop flagship holds a slight edge, but the Xeon's server-oriented feature set (ECC memory, eight-channel DDR5) differentiates it.
Intel Core i9-14900KS: The Xeon leads the i9-14900KS by 2.7% (89701). Despite the desktop chip's high clock speeds, the Xeon's 24 cores and 144 MB L3 cache give it the advantage in aggregate performance.
AMD EPYC 4565P: The Xeon trails the EPYC 4565P by 3.8% (95820). This is the largest gap in the comparison group, but still a modest margin in real-world terms.
Platform and Compatibility
The Xeon 6521P uses the Intel Socket 4710 and is part of the Xeon 6 (Granite Rapids-SP) generation. It is built on Intel's 5 nm process with a die size of 598 mm². Memory support is DDR5 with an eight-channel bus, delivering a memory bandwidth of 409.6 GB/s. ECC memory is supported, which is important for server reliability.
PCIe connectivity is Gen 5 with 136 lanes (CPU only), providing ample bandwidth for accelerators, storage, and networking. The production status is Active, and the part number is SRVNS. The processor is not multiplier-unlocked, so overclocking is not an option; performance is determined by the base clock of 2.60 GHz and boost clock of 4.10 GHz.
The cache hierarchy includes 112 KB L1 per core, 2 MB L2 per core, and 144 MB shared L3. The large L3 cache helps with data-heavy workloads. The market segment is Server/Workstation, and the processor is designed for platforms that require high memory bandwidth and extensive PCIe connectivity.
FAQ
Q: What is the launch MSRP of the Intel Xeon 6521P?
A: The launch MSRP is $1250.
Q: How many cores and threads does it have?
A: It has 24 cores and 48 threads.
Q: What memory type and bandwidth does it support?
A: It supports DDR5 memory with an eight-channel bus, delivering 409.6 GB/s of memory bandwidth. ECC memory is supported.
Q: What is the TDP?
A: The TDP is 225 W.
Q: What are the base and boost clocks?
A: The base clock is 2.60 GHz and the boost clock is 4.10 GHz.
Q: What is the PCIe configuration?
A: It provides Gen 5 with 136 lanes (CPU only).
Single-Thread vs Multi-Thread Behavior
The Xeon 6521P's single-thread performance is solid but not exceptional. The Cinebench R23 single-core score of 6956 and Passmark single-thread score of 2829 place it in line with many high-end desktop processors. The boost clock of 4.10 GHz is respectable for a
Detailed benchmark scores and charts for the Intel Xeon 6521P are below.
Benchmark Scores
cinebench_cinebench_r15_multicoreSource
Cinebench R15 multi-core renders a complex 3D scene using all CPU threads simultaneously. This test reveals how Intel Xeon 6521P performs in parallel rendering workloads like video production and 3D animation. Higher scores mean faster render times in professional applications.
Top 5 Performers
Top 5 PerformersNearby Performers
Nearby Performerscinebench_cinebench_r15_singlecoreSource
Cinebench R15 single-core measures the speed of one CPU thread rendering 3D geometry. This score indicates how Intel Xeon 6521P handles tasks that can't be parallelized across multiple cores. Games and many desktop applications still rely heavily on single-thread performance.
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cinebench_cinebench_r20_multicoreSource
Cinebench R20 multi-core uses a scene requiring 4x more computational power than R15. This test better reflects modern CPU capabilities for professional rendering on Intel Xeon 6521P.
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cinebench_cinebench_r20_singlecoreSource
Cinebench R20 single-core tests one thread against a more demanding scene than R15. This reveals the true single-thread rendering capability of Intel Xeon 6521P.
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cinebench_cinebench_r23_multicoreSource
Cinebench R23 multi-core is the current standard for CPU rendering benchmarks with a 10-minute minimum runtime. This extended test reveals sustained performance of Intel Xeon 6521P after thermal limits kick in.
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cinebench_cinebench_r23_singlecoreSource
Cinebench R23 single-core measures sustained single-thread performance over 10 minutes. This reveals how Intel Xeon 6521P maintains boost clocks under continuous load.
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passmark_data_compressionSource
Data compression measures how fast Intel Xeon 6521P can compress and decompress files. This is important for archiving, backup software, and file transfer applications.
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passmark_data_encryptionSource
Data encryption tests how fast Intel Xeon 6521P can encrypt information using AES and other algorithms. This is critical for security applications, VPNs, and secure communications. Modern CPUs with AES-NI hardware acceleration score significantly higher. Disk encryption, secure browsing, and VPN performance all benefit from faster encryption.
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passmark_extended_instructionsSource
Extended instructions tests Intel Xeon 6521P performance using SSE and AVX instruction sets. These specialized instructions accelerate multimedia, scientific, and AI workloads.
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passmark_find_prime_numbersSource
Find prime numbers tests Intel Xeon 6521P ability to identify primes through intensive calculations. This is a pure computational benchmark that stresses CPU arithmetic units without memory bottlenecks. The test reveals raw mathematical processing capability.
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passmark_floating_point_mathSource
Floating point math measures how Intel Xeon 6521P handles decimal calculations critical for scientific computing and 3D rendering. This affects performance in CAD and physics simulations.
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passmark_integer_mathSource
Integer math tests how fast Intel Xeon 6521P processes whole number calculations essential for database operations and compression algorithms. This is fundamental to general computing performance. Encryption and data processing heavily rely on integer operations. Higher scores benefit applications that work primarily with non-decimal numbers.
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passmark_multithreadSource
PassMark multi-thread tests Intel Xeon 6521P across integer math, floating point, compression, and encryption using all cores. This provides an overall multi-threaded CPU performance score. The combined result reflects general-purpose parallel computing capability. Results can be compared against millions of submissions in the PassMark database.
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passmark_physicsSource
Physics tests how Intel Xeon 6521P handles physics simulations used in games and engineering software. This measures performance in calculating object interactions and movements.
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passmark_random_string_sortingSource
Random string sorting measures how fast Intel Xeon 6521P can organize text data. This is important for database operations, search indexing, and data processing applications.
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passmark_single_threadSource
PassMark single-thread measures per-core performance of Intel Xeon 6521P across various computational tasks. This score is critical for gaming and single-threaded applications. Higher scores mean better system responsiveness in everyday use.
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passmark_singlethreadSource
PassMark single-thread measures per-core performance of Intel Xeon 6521P across various computational tasks. This score is critical for gaming and single-threaded applications. Higher scores mean better system responsiveness in everyday use. Many legacy applications and games still depend heavily on single-thread speed.
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