INTEL

Intel Core i7-5820K

Intel processor specifications and benchmark scores

6
Cores
12
Threads
3.6
GHz Boost
140W
TDP
🔓Unlocked

Intel Core i7-5820K Specifications

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Core i7-5820K Core Configuration

Processing cores and threading

The Intel Core i7-5820K features 6 physical cores and 12 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.

Cores
6
Threads
12
SMP CPUs
1
⏱️

i7-5820K Clock Speeds

Base and boost frequencies

Clock speed is a critical factor in Core i7-5820K 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 Core i7-5820K by Intel can dynamically adjust its frequency based on workload and thermal headroom.

Base Clock
3.3 GHz
Boost Clock
3.6 GHz
Multiplier
33x 🔓
💾

Intel's Core i7-5820K Cache Hierarchy

L1, L2, L3 cache sizes

Cache memory is ultra-fast storage built directly into the i7-5820K 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 Core i7-5820K's cache configuration is optimized for both gaming performance and productivity workloads, minimizing data fetch delays during intensive computations.

L1 Cache
64 KB (per core)
L2 Cache
256 KB (per core)
L3 Cache
15 MB (shared)
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Haswell Architecture & Process

Manufacturing and design details

The Intel Core i7-5820K is built on Intel's 22 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 i7-5820K incorporate advanced branch prediction and out-of-order execution for optimal performance.

Architecture
Haswell
Codename
Haswell-E
Process Node
22 nm
Foundry
Intel
Transistors
2,600 million
Die Size
356 mm²
Generation
Core i7 (Haswell-E)
🔢

Haswell Instruction Set Features

Supported CPU instructions and extensions

The Core i7-5820K 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.

MMX
SSE
SSE2
SSE3
SSSE3
SSE4.1
SSE4.2
AVX
AVX2
FMA3
AES-NI
F16C
BMI1
BMI2
Intel 64
VT-x
VT-d
🔌

i7-5820K Power & Thermal

TDP and power specifications

The Intel Core i7-5820K has a TDP (Thermal Design Power) of 140W, 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.

TDP
140W
🔧

Intel Socket 2011-3 Platform & Socket

Compatibility information

The Core i7-5820K uses the Intel Socket 2011-3 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.

Socket
Intel Socket 2011-3
PCIe
Gen 3, 28 Lanes(CPU only)
DDR5

Intel Socket 2011-3 Memory Support

RAM compatibility and speeds

Memory support specifications for the i7-5820K 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 Core i7-5820K 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.

Memory Type
DDR4
Memory Bus
Quad-channel
Memory Bandwidth
68.3 GB/s
📦

Core i7-5820K Product Information

Release and pricing details

The Intel Core i7-5820K 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 Core i7-5820K by Intel offers a specific balance of performance, features, and cost within Intel's product lineup.

Manufacturer
Intel
Release Date
Sep 2014
Market
Desktop
Status
End-of-life
Part Number
SR20S

Core i7-5820K 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 Core i7-5820K performs in parallel rendering workloads like video production and 3D animation. The R15 version remains useful for comparing against older hardware benchmarks. Higher scores directly correlate with faster render times in Cinema 4D and similar 3D applications.

cinebench_cinebench_r15_multicore #860 of 1788
841
6%
Max: 14,978

cinebench_cinebench_r15_singlecoreSource

Cinebench R15 single-core measures the speed of one CPU thread rendering 3D geometry. This score indicates how Intel Core i7-5820K handles tasks that can't be parallelized across multiple cores. Games and many desktop applications still rely heavily on single-thread performance. A higher single-core score means snappier system responsiveness in everyday use.

cinebench_cinebench_r15_singlecore #861 of 1245
118
6%
Max: 2,114

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 Core i7-5820K. The more demanding workload provides better differentiation between current-generation processors.

cinebench_cinebench_r20_multicore #860 of 1788
3,505
6%
Max: 62,412
Compare with other CPUs

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 Core i7-5820K. The increased complexity provides more accurate performance differentiation between modern CPUs.

cinebench_cinebench_r20_singlecore #860 of 1784
494
6%
Max: 8,811

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 Core i7-5820K after thermal limits kick in. The longer duration exposes cooling limitations that shorter benchmarks miss.

cinebench_cinebench_r23_multicore #860 of 1788
8,347
6%
Max: 148,601
Compare with other CPUs

cinebench_cinebench_r23_singlecoreSource

Cinebench R23 single-core measures sustained single-thread performance over 10 minutes. This reveals how Intel Core i7-5820K maintains boost clocks under continuous load. The extended runtime shows whether thermal throttling affects single-core performance.

cinebench_cinebench_r23_singlecore #860 of 1788
1,178
6%
Max: 20,979
Compare with other CPUs

geekbench_multicoreSource

Geekbench multi-core tests Intel Core i7-5820K across real-world workloads including image processing, machine learning, and data compression. All available threads are utilized to measure parallel performance. Higher scores indicate better capability in multitasking and content creation.

geekbench_multicore #304 of 711
5,464
24%
Max: 22,515
Compare with other CPUs

geekbench_singlecoreSource

Geekbench single-core measures how fast one thread of Intel Core i7-5820K can process tasks like web browsing and document editing. This score correlates with how snappy the system feels during normal use. Many applications still depend primarily on single-thread performance.

geekbench_singlecore #406 of 711
1,174
35%
Max: 3,401
Compare with other CPUs

About Intel Core i7-5820K

The Intel Core i7-5820K, part of Intel's Haswell-E lineup, represents a high-end desktop processor built on a 22nm manufacturing process. Featuring six cores and twelve threads, it balances multi-threaded performance with a base clock speed of 3.30 GHz and a turbo boost up to 3.60 GHz, all within a 140W TDP envelope. The chip integrates 15MB of shared L3 cache and utilizes the Socket 2011-3 platform, enabling compatibility with X99 chipsets for expanded PCIe lanes and DDR4 memory support. Despite its age, the i7-5820K remains a testament to Intel's chip design philosophy, prioritizing scalability and overclocking flexibility for enthusiasts. Its six-core architecture, paired with robust thermal design, positions it as a durable option for workstations and legacy performance builds. The processor's release in September 2014 marked a shift toward mainstreaming multi-core efficiency in consumer-grade hardware. While newer architectures have since surpassed it, the i7-5820K's design principles continue to influence modern high-core-count CPUs.

Performance benchmarks underscore the i7-5820K's prowess in multi-threaded workloads, scoring 8,347 points in Cinebench R23 and 5,464 points in Geekbench 5 Multi-Core. These metrics highlight its capability to handle demanding tasks like video rendering and 3D modeling, though single-core performance evidenced by 1,178 points in Cinebench R23 Single-Core and 1,174 in Geekbench reflects architectural limitations compared to contemporary processors. The Intel Core i7-5820K excels in parallel processing scenarios, making it a historical benchmark for mid-tier multi-core performance. While its single-threaded metrics lag behind modern CPUs, its multi-core efficiency remains relevant in scenarios prioritizing throughput over latency. This dichotomy makes the i7-5820K a case study in balancing core count and clock speeds, offering insights into pre-Rocket Lake architectural trade-offs. Enthusiasts benchmarking this chip often note its sustained viability in compute-heavy applications despite its aging microarchitecture.

Targeted at enthusiasts and prosumers during its release, the Intel Core i7-5820K occupies a niche market segment bridging consumer and workstation-grade hardware. For contemporary builds, pairing it with an X99 motherboard, DDR4 memory, and a mid-tier GPU like the RTX 3060 offers a balanced legacy setup for budget-conscious users seeking multi-threaded headroom. Cooling solutions should prioritize air or AIO liquid options to manage its 140W TDP, while overclocking potential remains a key draw for performance tuners. The Intel Core i7-5820K's Socket 2011-3 compatibility also allows for multi-GPU configurations, appealing to users requiring expandable PCIe bandwidth. Though unsuitable for cutting-edge gaming, its cost-effective performance profile suits virtualization hosts, media servers, or retroactive gaming rigs. As a relic of Intel's pre-10nm transition, the i7-5820K's market positioning now leans toward value-oriented builds where modern software demands aren't strictly tied to the latest architectures.

The AMD Equivalent of Core i7-5820K

Looking for a similar processor from AMD? The AMD Ryzen 7 1700 offers comparable performance and features in the AMD lineup.

AMD Ryzen 7 1700

AMD • 8 Cores

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