Intel Core i5-2500k vs Intel Core i5-6600K

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CPU comparison with benchmarks


Intel Core i5-2500k CPU1 vs CPU2 Intel Core i5-6600K
Intel Core i5-2500k Intel Core i5-6600K

CPU comparison

Intel Core i5-2500k or Intel Core i5-6600K - which processor is faster? In this comparison we look at the differences and analyze which of these two CPUs is better. We compare the technical data and benchmark results.

The Intel Core i5-2500k has 4 cores with 4 threads and clocks with a maximum frequency of 3.70 GHz. Up to 32 GB of memory is supported in 2 memory channels. The Intel Core i5-2500k was released in Q1/2011.

The Intel Core i5-6600K has 4 cores with 4 threads and clocks with a maximum frequency of 3.90 GHz. The CPU supports up to 64 GB of memory in 2 memory channels. The Intel Core i5-6600K was released in Q3/2015.
Intel Core i5 (328) Family Intel Core i5 (328)
Intel Core i 2000 (28) CPU group Intel Core i 6000 (24)
2 Generation 6
Sandy Bridge S Architecture Skylake S
Desktop / Server Segment Desktop / Server
-- Predecessor --
-- Successor Intel Core i5-7600K

CPU Cores and Base Frequency

The Intel Core i5-2500k is a 4 core processor with a clock frequency of 3.30 GHz (3.70 GHz). The Intel Core i5-6600K has 4 CPU cores with a clock frequency of 3.50 GHz (3.90 GHz).

Intel Core i5-2500k Characteristic Intel Core i5-6600K
4 Cores 4
4 Threads 4
normal Core architecture normal
No Hyperthreading No
Yes Overclocking ? Yes
3.30 GHz Frequency 3.50 GHz
3.70 GHz Turbo Frequency (1 Core) 3.90 GHz
3.70 GHz Turbo Frequency (All Cores) 3.60 GHz

Artificial Intelligence and Machine Learning

Processors with the support of artificial intelligence (AI) and machine learning (ML) can process many calculations, especially audio, image and video processing, much faster than classic processors. Algorithms for ML improve their performance the more data they have collected via software. ML tasks can be processed up to 10,000 times faster than with a classic processor.

Intel Core i5-2500k Characteristic Intel Core i5-6600K
-- AI hardware --
-- AI specifications --

Internal Graphics

The integrated graphics unit of a processor is not only responsible for the pure image output on the system, but can also significantly increase the efficiency of the system with the support of modern video codecs.

Intel HD Graphics 3000 GPU Intel HD Graphics 530
0.85 GHz GPU frequency 0.35 GHz
1.10 GHz GPU (Turbo) 1.15 GHz
6 GPU Generation 9
32 nm Technology 14 nm
2 Max. displays 3
12 Compute units 24
96 Shader 192
No Hardware Raytracing No
No Frame Generation No
2 GB Max. GPU Memory 32 GB
10.1 DirectX Version 12

Hardware codec support

A photo or video codec that is accelerated in hardware can greatly accelerate the working speed of a processor and extend the battery life of notebooks or smartphones when playing videos.

Intel HD Graphics 3000 GPU Intel HD Graphics 530
No Codec h265 / HEVC (8 bit) Decode / Encode
No Codec h265 / HEVC (10 bit) Decode
Decode / Encode Codec h264 Decode / Encode
No Codec VP9 Decode
No Codec VP8 Decode / Encode
No Codec AV1 No
Decode / Encode Codec AVC Decode / Encode
Decode Codec VC-1 Decode
No Codec JPEG Decode / Encode

Memory & PCIe

The Intel Core i5-2500k supports a maximum of 32 GB of memory in 2 memory channels. The Intel Core i5-6600K can connect up to 64 GB of memory in 2 memory channels.

Intel Core i5-2500k Characteristic Intel Core i5-6600K
DDR3-1333 Memory DDR4-2133, DDR3-1600
32 GB Max. Memory 64 GB
2 (Dual Channel) Memory channels 2 (Dual Channel)
21.3 GB/s Max. Bandwidth 34.1 GB/s
No ECC No
-- L2 Cache --
6.00 MB L3 Cache 6.00 MB
2.0 PCIe version 3.0
16 PCIe lanes 16
8.0 GB/s PCIe Bandwidth 15.8 GB/s

Thermal Management

The TDP (Thermal Design Power) of a processor specifies the required cooling solution. The Intel Core i5-2500k has a TDP of 95 W, that of the Intel Core i5-6600K is 91 W.

Intel Core i5-2500k Characteristic Intel Core i5-6600K
95 W TDP (PL1 / PBP) 91 W
-- TDP (PL2) --
-- TDP up --
-- TDP down --
-- Tjunction max. --

Technical details

The Intel Core i5-2500k has a 6.00 MB cache, while the Intel Core i5-6600K cache has a total of 6.00 MB.

Intel Core i5-2500k Characteristic Intel Core i5-6600K
32 nm Technology 14 nm
Monolithic Chip design Monolithic
x86-64 (64 bit) Instruction set (ISA) x86-64 (64 bit)
SSE4.1, SSE4.2, AVX ISA extensions SSE4.1, SSE4.2, AVX2
LGA 1155 Socket LGA 1151
VT-x, VT-x EPT Virtualization VT-x, VT-x EPT, VT-d
Yes AES-NI Yes
Windows 10, Linux Operating systems Windows 10, Linux
Q1/2011 Release date Q3/2015
-- Release price 280 $
show more data show more data


Cinebench R23 (Single-Core)

Cinebench R23 is the successor of Cinebench R20 and is also based on the Cinema 4 Suite. Cinema 4 is a worldwide used software to create 3D forms. The single-core test only uses one CPU core, the amount of cores or hyperthreading ability doesn't count.
Intel Core i5-2500k Intel Core i5-2500k
4C 4T @ 3.70 GHz
697 (67%)
Intel Core i5-6600K Intel Core i5-6600K
4C 4T @ 3.90 GHz
1041 (100%)

Cinebench R23 (Multi-Core)

Cinebench R23 is the successor of Cinebench R20 and is also based on the Cinema 4 Suite. Cinema 4 is a worldwide used software to create 3D forms. The multi-core test involves all CPU cores and taks a big advantage of hyperthreading.
Intel Core i5-2500k Intel Core i5-2500k
4C 4T @ 3.70 GHz
2450 (62%)
Intel Core i5-6600K Intel Core i5-6600K
4C 4T @ 3.60 GHz
3965 (100%)

Geekbench 5, 64bit (Single-Core)

Geekbench 5 is a cross plattform benchmark that heavily uses the systems memory. A fast memory will push the result a lot. The single-core test only uses one CPU core, the amount of cores or hyperthreading ability doesn't count.
Intel Core i5-2500k Intel Core i5-2500k
4C 4T @ 3.70 GHz
760 (69%)
Intel Core i5-6600K Intel Core i5-6600K
4C 4T @ 3.90 GHz
1106 (100%)

Geekbench 5, 64bit (Multi-Core)

Geekbench 5 is a cross plattform benchmark that heavily uses the systems memory. A fast memory will push the result a lot. The multi-core test involves all CPU cores and taks a big advantage of hyperthreading.
Intel Core i5-2500k Intel Core i5-2500k
4C 4T @ 3.70 GHz
2537 (70%)
Intel Core i5-6600K Intel Core i5-6600K
4C 4T @ 3.60 GHz
3631 (100%)

Geekbench 6 (Single-Core)

Geekbench 6 is a benchmark for modern computers, notebooks and smartphones. What is new is an optimized utilization of newer CPU architectures, e.g. based on the big.LITTLE concept and combining CPU cores of different sizes. The single-core benchmark only evaluates the performance of the fastest CPU core, the number of CPU cores in a processor is irrelevant here.
Intel Core i5-2500k Intel Core i5-2500k
4C 4T @ 3.70 GHz
651 (48%)
Intel Core i5-6600K Intel Core i5-6600K
4C 4T @ 3.90 GHz
1359 (100%)

Geekbench 6 (Multi-Core)

Geekbench 6 is a benchmark for modern computers, notebooks and smartphones. What is new is an optimized utilization of newer CPU architectures, e.g. based on the big.LITTLE concept and combining CPU cores of different sizes. The multi-core benchmark evaluates the performance of all of the processor's CPU cores. Virtual thread improvements such as AMD SMT or Intel's Hyper-Threading have a positive impact on the benchmark result.
Intel Core i5-2500k Intel Core i5-2500k
4C 4T @ 3.70 GHz
1948 (49%)
Intel Core i5-6600K Intel Core i5-6600K
4C 4T @ 3.60 GHz
3985 (100%)

Cinebench R20 (Single-Core)

Cinebench R20 is the successor of Cinebench R15 and is also based on the Cinema 4 Suite. Cinema 4 is a worldwide used software to create 3D forms. The single-core test only uses one CPU core, the amount of cores or hyperthreading ability doesn't count.
Intel Core i5-2500k Intel Core i5-2500k
4C 4T @ 3.70 GHz
262 (66%)
Intel Core i5-6600K Intel Core i5-6600K
4C 4T @ 3.90 GHz
395 (100%)

Cinebench R20 (Multi-Core)

Cinebench R20 is the successor of Cinebench R15 and is also based on the Cinema 4 Suite. Cinema 4 is a worldwide used software to create 3D forms. The multi-core test involves all CPU cores and taks a big advantage of hyperthreading.
Intel Core i5-2500k Intel Core i5-2500k
4C 4T @ 3.70 GHz
894 (57%)
Intel Core i5-6600K Intel Core i5-6600K
4C 4T @ 3.60 GHz
1572 (100%)

iGPU - FP32 Performance (Single-precision GFLOPS)

The theoretical computing performance of the internal graphics unit of the processor with simple accuracy (32 bit) in GFLOPS. GFLOPS indicates how many billion floating point operations the iGPU can perform per second.
Intel Core i5-2500k Intel Core i5-2500k
Intel HD Graphics 3000 @ 1.10 GHz
211 (48%)
Intel Core i5-6600K Intel Core i5-6600K
Intel HD Graphics 530 @ 1.15 GHz
442 (100%)

Estimated results for PassMark CPU Mark

Some of the CPUs listed below have been benchmarked by CPU-monkey. However the majority of CPUs have not been tested and the results have been estimated by a CPU-monkey’s secret proprietary formula. As such they do not accurately reflect the actual Passmark CPU mark values and are not endorsed by PassMark Software Pty Ltd.
Intel Core i5-2500k Intel Core i5-2500k
4C 4T @ 3.70 GHz
4155 (66%)
Intel Core i5-6600K Intel Core i5-6600K
4C 4T @ 3.60 GHz
6318 (100%)

Blender 2.81 (bmw27)

Blender is a free 3D graphics software for rendering (creating) 3D bodies, which can also be textured and animated in the software. The Blender benchmark creates predefined scenes and measures the time (s) required for the entire scene. The shorter the time required, the better. We selected bmw27 as the benchmark scene.
Intel Core i5-2500k Intel Core i5-2500k
4C 4T @ 3.70 GHz
778.7 (100%)
Intel Core i5-6600K Intel Core i5-6600K
4C 4T @ 3.60 GHz
486.5 (62%)

CPU-Z Benchmark 17 (Single-Core)

The CPU-Z benchmark measures a processor's performance by measuring the time it takes the system to complete all benchmark calculations. The faster the benchmark is completed, the higher the score.
Intel Core i5-2500k Intel Core i5-2500k
4C 4T @ 3.70 GHz
372 (81%)
Intel Core i5-6600K Intel Core i5-6600K
4C 4T @ 3.60 GHz
459 (100%)

CPU-Z Benchmark 17 (Multi-Core)

The CPU-Z benchmark measures a processor's performance by measuring the time it takes the system to complete all benchmark calculations. The faster the benchmark is completed, the higher the score.
Intel Core i5-2500k Intel Core i5-2500k
4C 4T @ 3.30 GHz
1336 (82%)
Intel Core i5-6600K Intel Core i5-6600K
4C 4T @ 3.50 GHz
1621 (100%)

Cinebench R15 (Single-Core)

Cinebench R15 is the successor of Cinebench 11.5 and is also based on the Cinema 4 Suite. Cinema 4 is a worldwide used software to create 3D forms. The single-core test only uses one CPU core, the amount of cores or hyperthreading ability doesn't count.
Intel Core i5-2500k Intel Core i5-2500k
4C 4T @ 3.70 GHz
127 (77%)
Intel Core i5-6600K Intel Core i5-6600K
4C 4T @ 3.90 GHz
166 (100%)

Cinebench R15 (Multi-Core)

Cinebench R15 is the successor of Cinebench 11.5 and is also based on the Cinema 4 Suite. Cinema 4 is a worldwide used software to create 3D forms. The multi-core test involves all CPU cores and taks a big advantage of hyperthreading.
Intel Core i5-2500k Intel Core i5-2500k
4C 4T @ 3.70 GHz
461 (77%)
Intel Core i5-6600K Intel Core i5-6600K
4C 4T @ 3.60 GHz
600 (100%)

Cinebench 2024 (Single-Core)

The Cinebench 2024 benchmark is based on the Redshift rendering engine, which is also used in Maxon's 3D program Cinema 4D. The benchmark runs are each 10 minutes long to test whether the processor is limited by its heat generation.
Intel Core i5-2500k Intel Core i5-2500k
4C 4T @ 3.70 GHz
0 (0%)
Intel Core i5-6600K Intel Core i5-6600K
4C 4T @ 3.90 GHz
65 (100%)

Cinebench 2024 (Multi-Core)

The Multi-Core test of the Cinebench 2024 benchmark uses all cpu cores to render using the Redshift rendering engine, which is also used in Maxons Cinema 4D. The benchmark run is 10 minutes long to test whether the processor is limited by its heat generation.
Intel Core i5-2500k Intel Core i5-2500k
4C 4T @ 3.70 GHz
0 (0%)
Intel Core i5-6600K Intel Core i5-6600K
4C 4T @ 3.90 GHz
222 (100%)

Devices using this processor

Intel Core i5-2500k Intel Core i5-6600K
Unknown Unknown

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