Core i7-5820K

Details and Benchmarks for Intel Core i7-5820K

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Benchmark Results

Combined benchmark scores based on multiple data points, giving a quick overview of this processor's performance.

Overall Score

Overall score for Core i7-5820K based on all benchmark results gathered. Look at this like a meta score, you will find more specific workload ratings below.

5,493 Rank: 488
Rank Name Score Visual
484 Xeon E5-2682 v4 5,496
+0.1%
485 Core i7-10850H 5,496
+0.1%
486 Ryzen 3 7330U 5,496
+0.1%
487 Core i5-10600T 5,494
+0%
488 Core i7-5820K 5,493
489 Xeon E5-2637 v4 5,491
+-0%
490 Xeon W-2135 5,490
-0.1%
491 Xeon E-2276M 5,489
-0.1%
492 Core i7-9700E 5,489
-0.1%
493 Xeon E5-1650 v3 5,488
-0.1%

View full ranking →

Multicore Score

Multicore performance score for Core i7-5820K based on multi-threaded benchmark results.

5,293 Rank: 472
Rank Name Score Visual
468 Core i7-10875H 5,300
+0.1%
469 Core i7-9700 5,296
+0.1%
470 Xeon E-2186M 5,295
+0%
471 Ryzen 5 PRO 3400G 5,294
+0%
472 Core i7-5820K 5,293
473 Core i7-7700K 5,291
+-0%
474 Xeon Gold 6128 5,290
-0.1%
475 Ryzen 5 2600 5,290
-0.1%
476 Xeon E5-4655 v4 5,288
-0.1%
477 Core i3-6167U 5,288
-0.1%

View full ranking →

Singlecore Score

Single-core performance score for Core i7-5820K based on single-threaded benchmark results.

5,627 Rank: 471
Rank Name Score Visual
467 Ryzen 7 PRO 1700 5,633
+0.1%
468 Ryzen 5 2500X 5,633
+0.1%
469 Xeon E3-1270 v5 5,631
+0.1%
470 Intel Core i7-4850HQ 5,629
+0%
471 Core i7-5820K 5,627
472 Core i7-8850H 5,626
+-0%
473 Core i7-4790T 5,624
-0.1%
474 Xeon E5-2696 v3 5,624
-0.1%
475 Xeon Gold 6254 5,622
-0.1%
476 Ryzen 5 PRO 1600 5,622
-0.1%

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Workload Scores

Performance scores grouped by workload type, normalized and aggregated from multiple raw benchmark results.

Number Crunching

Aggregated score for Core i7-5820K based on integer math, floating point math, and prime number computation benchmarks.

4,798 Rank: 536
Rank Name Score Visual
532 Core i7-8700T 4,803
+0.1%
533 Core i7-1185G7 4,802
+0.1%
534 Core i9-8950HK 4,799
+0%
535 Ryzen 5 2600E 4,798
+0%
536 Core i7-5820K 4,798
537 Ryzen 3 5425U 4,798
+0%
538 Ryzen 3 PRO 5475U 4,797
+-0%
539 Core i7-1185G7E 4,797
+-0%
540 Xeon D-1559 4,796
+-0%
541 Core i7-1165G7 4,796
+-0%

View full ranking →

Data Processing

Aggregated score for Core i7-5820K based on data encryption, data compression, and string sorting benchmarks.

4,812 Rank: 546
Rank Name Score Visual
542 Xeon E5-2643 v2 4,814
+0%
543 Ryzen 5 PRO 2400G 4,813
+0%
544 Ryzen 3 5300U 4,813
+0%
545 Xeon E-2226G 4,812
+0%
546 Core i7-5820K 4,812
547 Ryzen 5 PRO 1500 4,811
+-0%
548 Ryzen 3 PRO 4450U 4,811
+-0%
549 Xeon Silver 4110 4,810
+-0%
550 Core i5-10400T 4,810
+-0%
551 Core i9-8950HK 4,808
-0.1%

View full ranking →

Physics & Compute

Aggregated score for Core i7-5820K based on physics simulation and extended instruction set (SSE/AVX) benchmarks.

4,872 Rank: 497
Rank Name Score Visual
493 Xeon Silver 4110 4,879
+0.1%
494 Core Ultra 5 134U 4,875
+0.1%
495 Xeon D-1577 4,873
+0%
496 Core i5-8400 4,872
+0%
497 Core i7-5820K 4,872
498 Core i5-9400 4,871
+-0%
499 Ryzen 7 PRO 2700X 4,871
+-0%
500 Core i7-10850H 4,869
-0.1%
501 Xeon E5-2630L v4 4,868
-0.1%
502 Core i5-8500 4,868
-0.1%

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Core i7-5820K Details

The Intel Core i7-5820K stands as a high-end desktop processor from the Haswell-E generation, launched in September 2014. Although it is now over a decade old, its design still reflects the robust capabilities of its era, particularly in multi-threaded performance. Built on a 22 nm process and featuring a 6-core, 12-thread architecture, the i7-5820K was designed for power users and enthusiasts who required strong multitasking and productivity performance. Its unlocked multiplier makes it a favorite for overclocking, offering significant headroom for those willing to push the limits of cooling and power delivery.

With a base frequency of 3.3 GHz and a turbo boost up to 3.6 GHz, the processor delivers solid single-threaded performance, as evidenced by its single-core score of 5627. This places it just behind several modern mobile and desktop CPUs, highlighting how well it held up in its time. The integrated L3 cache of 14.3 MB, combined with 0.061 MiB of L1 and 0.244 MiB of L2 cache, supports efficient data access across all six cores. The quad-channel DDR4 memory interface allows for memory speeds up to 2133 MT/s, contributing to a memory bandwidth of 68.3 GB/s—ideal for memory-intensive applications.

Despite its age, the i7-5820K holds its own in multicore performance, scoring 5293 in the multicore benchmark, ranking #472 out of 2060 processors. This performance is competitive with modern mid-tier offerings, though it falls well behind today’s top-tier processors. In the overall score, it ranks #488 with a score of 5493, placing it just behind contemporary mobile and mainstream CPUs like the Core i5-10600T and Ryzen 3 7330U. This suggests the processor remains capable in general workloads, especially when overclocked.

One notable limitation of the i7-5820K is its 140 W TDP, which demands substantial cooling solutions and limits its efficiency compared to modern low-power alternatives. Additionally, it lacks integrated graphics, requiring a discrete GPU for any visual output. However, it supports a wide range of advanced technologies, including AVX2, AES-NI, and Intel Virtualization Technology, making it suitable for virtualization and encryption-heavy workloads. The processor also supports up to 64 GB of DDR4 memory across four channels, ensuring it can handle large datasets.

As of March 2026, the Core i7-5820K is best suited for legacy systems or enthusiasts running overclocked builds where modern CPUs are not an option. While it no longer competes with today’s top-tier processors, its strong single-core performance and overclocking potential make it a viable option for users who prioritize raw clock speeds and multi-threaded performance in older platforms. It remains a testament to Intel’s engineering in the mid-2010s, offering a blend of power, flexibility, and longevity.
Frequently Compared

AMD Ryzen 7 2700 25 views

Intel Atom Z520 24 views

AMD Ryzen 7 PRO 2700 23 views

Intel Xeon Silver 4112 21 views

Intel Xeon Silver 4110 20 views

Intel Xeon Silver 4116 20 views

AMD Ryzen 3 PRO 2200GE 19 views

AMD Ryzen 9 PRO 3900 18 views

Intel Xeon Silver 4116T 18 views

AMD Ryzen 5 PRO 3500U 17 views

Intel Core i7-5820K

Main Specifications

Designer: Intel
Name: Core i7-5820K
Model Number: i7-5820K
Cores: 6
Threads: 12
Base Frequency: 3300 MHz
Clock Multiplier: 33x (locked)
Core Name: Haswell-E
Socket: LGA2011-v3
Package:
Target Segment: Desktop
Max CPUs: 1
TDP: 140 W

Cache Specifications

L1 Cache: 62.464 KiB
L2 Cache: 0.244 MiB
L3 Cache: 14.305 MiB

Memory Specifications

Supported Memory Type: DDR4 1333/1600/2133
Memory Channels: 4
Maximum Memory: 0 GB
Maximum Bandwidth: 68 GB/s
ECC Support: No

PCI-Express Specifications

PCIe Revision: 3.0
PCIe Lanes: 28
PCIe Configuration: Up to 1x16, 2x8, 1x8+2x4

Integrated Graphics

GPU: None
GPU Designer: Intel
GPU Max Frequency: 1100 MHz

Physical Specifications

Process: 22 nm
Die Area: 356 mm²
Manufacturer: Intel
Word Size: 64-bit

CPU Features

MMX SSE SSE2 SSE3 SSSE3 SSE4.1 SSE4.2 AVX AVX2 BMI1 BMI2 FMA3 AES CLMUL F16C x86-64 HT EIST TXT VT-x VT-d EPT Secure Key SMEP IPT TSX
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