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Intel Core i5 8600K Review | 78 Data compared

Avg. price:~£160PassMark benchmark result:10137N. of physical cores:6CPU boost clock speed:4.3 GHzCPU socket:LGA1151TDP (Thermal design power):95 W

Intel Core i5 8600K Review: Compare 78 technical specifications and user reviews to see how this product ranks in the Processors category and whether it is worth buying.

5.4

▼Worse than 54% of processors

5.0

▼Worse than 59% of processors

9.4

★Better than 94% of processors

4.4
Gaming
Gaming
4.4/ 10
✕
What it is
Measures single-core benchmark performance, peak boost clock speeds, and fast L3 cache sizing critical for high frame rates.
When it matters
When you want to play demanding mobile games, 3D titles, or run graphics-intensive apps smoothly.
Score distribution
▼
<55-66-77-88-99-10
Score components
30.0%
4.7
PassMark single-core benchmark score
25.0%
4.8
Geekbench 6 single-core benchmark score
20.0%
5.8
CPU boost clock speed
17.0%
1.8
L3 cache
8.0%
3.6
N. of physical cores
3.9
Video editing
Video editing
3.9/ 10
✕
What it is
Assesses multi-core benchmark throughput, total physical core and thread count, and cache bandwidth for rapid video rendering.
When it matters
When evaluating how effectively this processors meets your specific video editing needs.
Score distribution
▼
<55-66-77-88-99-10
Score components
45.0%
4.9
Geekbench 6 multi-core benchmark score
20.0%
3.6
N. of physical cores
20.0%
3.3
CPU threads
15.0%
1.8
L3 cache

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Technical Specifications of processor Intel Core i5 8600K

5.4

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Platform

8.0

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Brand name

Intel

Processor type

CPU socket

Chipset

CPU architecture

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Performance

4.6

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N. of physical cores

CPU threads

Threads per core

CPU boost clock speed

CPU base clock speed

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Cache & Architecture

4.9

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Semiconductor size

Foundry

L3 cache

L2 cache

L1 cache

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Memory & PCIe

5.9

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DDR memory version

Maximum memory speed

Max memory speed (JEDEC)

Max memory speed (XMP / EXPO)

?

Maximum memory capacity

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Integrated Graphics

6.8

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Integrated graphics

Integrated GPU model

Integrated GPU execution units

Integrated GPU base frequency

Integrated media encoders/decoders

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Power & Thermal

4.8

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TDP (Thermal design power)

Base power (PL1)

Boost power (PL2)

Tau (power duration limit)

Configurable TDP

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Intel Core i5 8600K vs the average processor

Why is Intel Core i5 8600K better than the average processor?

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Unlocked for overclocking
Unlocked multiplier
yes
▲ Better than 78% of models
This processor has an unlocked multiplier, the average processor does not. 21.7% of processors have an unlocked multiplier.
Supports memory overclocking
Memory overclocking
yes
▲ Better than 56% of models
This processor supports memory overclocking, the average processor does not. 43.6% of processors support memory overclocking.
Higher base clock
CPU base clock speed
6 x 3.6 GHz
▲ Better than 70% of models
This processor has a higher base clock than the average processor (6x3.6 GHz vs 4x3.3 GHz).
6x3.6 GHz vs 4x3.3 GHz
2x more memory capacity
Maximum memory capacity
128 GB
▲ Better than 62% of models
Market range: <32 GB – >256 GB
This processor has more maximum memory capacity than the average processor (128 GB vs 64 GB). The average processor supports 64 GB of memory.
128 GB vs 64 GB
10x more popular
Intel Core i5 8600K is more popular than the average processor (10 vs 1).
10 vs 1
Advanced security extensions
Security extensions
AES-NI, NX bit, Secure Key, SGX, TXT, MPX, OS Guard, Boot Guard
▲ Better than 57% of models
This processor provides more advanced security extensions than the average processor (AES-NI, NX bit, Secure Key, SGX, TXT, MPX, OS Guard, Boot Guard vs AES-NI, NX bit, Secure Processor).
AES-NI, NX bit, Secure Key, SGX, TXT, MPX, OS Guard, Boot Guard vs AES-NI, NX bit, Secure Processor
17.9% higher user score
User score
9.4/ 10
✕
What it is
A rating that combines user reviews and the total number of reviews received by the processor.
When it matters
When you want to know how a processor performs in real workloads and how reliable it is for gaming, productivity, and efficiency according to user feedback.
Score distribution
▼
▼
<55-66-77-88-99-10
Intel Core i5 8600K
the average processor
Intel Core i5 8600K has a higher user score than the average processor (9.44 vs 8.000).
9.44 vs 8
19% higher multi-core score
Geekbench 6 multi-core benchmark score
5,748
▲ Better than 55% of models
Market range: <763 – >14k
This processor has a higher Geekbench 6 multi-core score than the average processor (5,748 vs 4,829). The average processor scores 4,829 in Geekbench 6 multi-core.
5,748 vs 4,829

10x more popular
Intel Core i5 8600K is more popular than the average processor (10 vs 1).
10 vs 1
17.9% higher user score
User score
9.4/ 10
✕
What it is
A rating that combines user reviews and the total number of reviews received by the processor.
When it matters
When you want to know how a processor performs in real workloads and how reliable it is for gaming, productivity, and efficiency according to user feedback.
Score distribution
▼
▼
<55-66-77-88-99-10
Intel Core i5 8600K
the average processor
Intel Core i5 8600K has a higher user score than the average processor (9.44 vs 8.000).
9.44 vs 8

Advanced security extensions
Security extensions
AES-NI, NX bit, Secure Key, SGX, TXT, MPX, OS Guard, Boot Guard
▲ Better than 57% of models
This processor provides more advanced security extensions than the average processor (AES-NI, NX bit, Secure Key, SGX, TXT, MPX, OS Guard, Boot Guard vs AES-NI, NX bit, Secure Processor).
AES-NI, NX bit, Secure Key, SGX, TXT, MPX, OS Guard, Boot Guard vs AES-NI, NX bit, Secure Processor
Modern CPU socket
CPU socket
LGA1151
▲ Better than 61% of models
This processor uses a more modern CPU socket than the average processor (LGA1151 vs FP4).
LGA1151 vs FP4

Unlocked for overclocking
Unlocked multiplier
yes
▲ Better than 78% of models
This processor has an unlocked multiplier, the average processor does not. 21.7% of processors have an unlocked multiplier.
Higher base clock
CPU base clock speed
6 x 3.6 GHz
▲ Better than 70% of models
This processor has a higher base clock than the average processor (6x3.6 GHz vs 4x3.3 GHz).
6x3.6 GHz vs 4x3.3 GHz
19% higher multi-core score
Geekbench 6 multi-core benchmark score
5,748
▲ Better than 55% of models
Market range: <763 – >14k
This processor has a higher Geekbench 6 multi-core score than the average processor (5,748 vs 4,829). The average processor scores 4,829 in Geekbench 6 multi-core.
5,748 vs 4,829

More advanced microarchitecture
Microarchitecture codename
Coffee Lake
▼ Worse than 50% of models
This processor uses a more advanced microarchitecture than the average processor (Coffee Lake vs Kaby Lake).
Coffee Lake vs Kaby Lake
15.3% smaller die size
Die size
150 mm²
▲ Better than 61% of models
Market range: <99 mm² – >257 mm²
This processor has a lower die size than the average processor (150 mm² vs 177 mm²). The average processor has a die size of 177 mm².
150 mm² vs 177 mm²

Supports memory overclocking
Memory overclocking
yes
▲ Better than 56% of models
This processor supports memory overclocking, the average processor does not. 43.6% of processors support memory overclocking.
2x more memory capacity
Maximum memory capacity
128 GB
▲ Better than 62% of models
Market range: <32 GB – >256 GB
This processor has more maximum memory capacity than the average processor (128 GB vs 64 GB). The average processor supports 64 GB of memory.
128 GB vs 64 GB

Why is Intel Core i5 8600K worse than the average processor?

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30.1% lower Cinebench R20 single-core score
Cinebench R20 single-core benchmark score
342
▼ Worse than 83% of models
Market range: <282 – >775
This processor has a lower Cinebench R20 single-core score than the average processor (342 vs 489). The average processor scores 489 in Cinebench R20 single-core.
342 vs 489
No configurable TDP
Configurable TDP
no
▼ Worse than 53% of models
This processor does not support configurable TDP, the average processor does. 52.8% of processors support configurable TDP.
2.11x higher base power
Base power (PL1)
95 W
▼ Worse than 89% of models
Market range: <15 W – >90 W
This processor has a higher base power draw than the average processor (95 W vs 45 W). The average processor has a base power draw of 45 W.
95 W vs 45 W
No multithreading support
Multithreading
no
▼ Worse than 74% of models
This processor does not support multithreading, the average processor does. 74.2% of processors support multithreading.
98.3% higher boost power
Boost power (PL2)
119 W
▼ Worse than 80% of models
Market range: <25 W – >150 W
This processor has a higher boost power draw than the average processor (119 W vs 60 W). The average processor has a boost power draw of 60 W.
119 W vs 60 W
16.7% larger process node
Semiconductor size
14 nm
▼ Worse than 51% of models
Market range: <4 nm – >24 nm
This processor has a higher process node than the average processor (14 nm vs 12 nm). The average processor uses a process node of 12 nm.
14 nm vs 12 nm
50% less L2 per core
L2 per core
0.25 MB/core
▼ Worse than 63% of models
Market range: <0.25 MB/core – >2 MB/core
This processor has less L2 cache per core than the average processor (0.3 MB/core vs 0.5 MB/core). The average processor provides 0.5 MB/core of L2 cache per core.
0.25 MB/core vs 0.5 MB/core
2.11x higher TDP
TDP (Thermal design power)
95 W
▼ Worse than 89% of models
Market range: <15 W – >90 W
This processor has a higher TDP than the average processor (95 W vs 45 W). The average processor has a TDP of 45 W.
95 W vs 45 W

3 years older release date
Release date
2017
▼ Worse than 69% of models
Market range: <2k – >2k
This processor has an older release date than the average processor (2017 vs 2020).
October 2017
2017 vs 2020

30.1% lower Cinebench R20 single-core score
Cinebench R20 single-core benchmark score
342
▼ Worse than 83% of models
Market range: <282 – >775
This processor has a lower Cinebench R20 single-core score than the average processor (342 vs 489). The average processor scores 489 in Cinebench R20 single-core.
342 vs 489
No multithreading support
Multithreading
no
▼ Worse than 74% of models
This processor does not support multithreading, the average processor does. 74.2% of processors support multithreading.
21.9% weaker multi-core performance
Cinebench R20 multi-core benchmark score
2,181
▼ Worse than 58% of models
Market range: <702 – >10.8k
This processor has a lower multi-core performance than the average processor (2,181 vs 2,791). The average processor scores 2,791 in Cinebench R20 multi-core.
2,181 vs 2,791
2 fewer CPU threads
CPU threads
6
▼ Worse than 65% of models
Market range: <4 – >24
This processor has fewer CPU threads than the average processor (6 vs 8). The average processor has 8 CPU threads.
6 vs 8
1 fewer threads per core
Threads per core
1
▼ Worse than 70% of models
Market range: <0 – >2.5
This processor has fewer threads per core than the average processor (1 vs 2). The average processor offers 2 threads per core.
1 vs 2

16.7% larger process node
Semiconductor size
14 nm
▼ Worse than 51% of models
Market range: <4 nm – >24 nm
This processor has a higher process node than the average processor (14 nm vs 12 nm). The average processor uses a process node of 12 nm.
14 nm vs 12 nm
50% less L2 per core
L2 per core
0.25 MB/core
▼ Worse than 63% of models
Market range: <0.25 MB/core – >2 MB/core
This processor has less L2 cache per core than the average processor (0.3 MB/core vs 0.5 MB/core). The average processor provides 0.5 MB/core of L2 cache per core.
0.25 MB/core vs 0.5 MB/core
12.5% less L3 per core
L3 per core
1.5 MB/core
▼ Worse than 54% of models
Market range: <1 MB/core – >3 MB/core
This processor has less L3 cache per core than the average processor (1.5 MB/core vs 1.7 MB/core). The average processor provides 1.714 MB/core of L3 cache per core.
1.5 MB/core vs 1.714 MB/core
40% smaller L2 cache
L2 cache
1.5 MB
▼ Worse than 62% of models
Market range: <1 MB – >16 MB
This processor has a lower L2 cache than the average processor (1.5 MB vs 2.5 MB). The average processor has L2 cache of 2.5 MB.
1.5 MB vs 2.5 MB

Lower JEDEC memory speed
Max memory speed (JEDEC)
DDR4-2666 MHz
▼ Worse than 58% of models
This processor has a lower JEDEC memory speed than the average processor (DDR4-2666 MHz vs DDR4-3200 MHz). The average processor supports JEDEC memory speed of DDR4-3200 MHz.
DDR4-2,666 MHz vs DDR4-3,200 MHz
9.2% lower memory bandwidth
Maximum memory bandwidth
41.6 GB/s
▼ Worse than 55% of models
Market range: <25 GB/s – >100 GB/s
This processor has a lower memory bandwidth than the average processor (41.6 GB/s vs 45.8 GB/s). The average processor offers memory bandwidth of 45.8 GB/s.
41.6 GB/s vs 45.8 GB/s
9.1% lower memory speed
Maximum memory speed
2,666 MHz
▼ Worse than 55% of models
Market range: <1.5k MHz – >6.5k MHz
This processor has a lower maximum memory speed than the average processor (2666 MHz vs 2933 MHz). The average processor supports memory speed of 2933 MHz.
2,666 MHz vs 2,933 MHz

Narrower media codec support
Integrated media encoders/decoders
H.265 (HW decode), VP9 (HW decode), JPEG (HW decode)
▲ Better than 54% of models
This processor supports fewer media codecs than the average processor (H.265 (HW decode), VP9 (HW decode), JPEG (HW decode) vs H.264 (HW decode/encode), H.265 (HW decode/encode), VP9 (HW decode/encode), AV1 (HW decode)).
H.265 (HW decode), VP9 (HW decode), JPEG (HW decode) vs H.264 (HW decode/encode), H.265 (HW decode/encode), VP9 (HW decode/encode), AV1 (HW decode)

No configurable TDP
Configurable TDP
no
▼ Worse than 53% of models
This processor does not support configurable TDP, the average processor does. 52.8% of processors support configurable TDP.
2.11x higher base power
Base power (PL1)
95 W
▼ Worse than 89% of models
Market range: <15 W – >90 W
This processor has a higher base power draw than the average processor (95 W vs 45 W). The average processor has a base power draw of 45 W.
95 W vs 45 W
98.3% higher boost power
Boost power (PL2)
119 W
▼ Worse than 80% of models
Market range: <25 W – >150 W
This processor has a higher boost power draw than the average processor (119 W vs 60 W). The average processor has a boost power draw of 60 W.
119 W vs 60 W
2.11x higher TDP
TDP (Thermal design power)
95 W
▼ Worse than 89% of models
Market range: <15 W – >90 W
This processor has a higher TDP than the average processor (95 W vs 45 W). The average processor has a TDP of 45 W.
95 W vs 45 W
20 seconds shorter turbo duration
Tau (power duration limit)
8 seconds
★ Better than 90% of models
Market range: <8 seconds – >28 seconds
This processor has a lower turbo duration limit than the average processor (8 seconds vs 28 seconds). The average processor maintains turbo for 28 seconds.
8 seconds vs 28 seconds

Video reviews

Hands-on testing, unboxing, and real-world video evaluations

Expert reviews

In-depth analysis and verdict from leading tech publications

tomshardware.com

03/01/2018

Summary of the review

Gaming And Streaming: Intel Core i5 & AMD Ryzen 5 Would you like to see a performance comparison between the i5-8600K and its modern successors or com...

The AMD Ryzen 5 1600X proves superior for simultaneous gaming and streaming due to its 12-thread architecture, offering a smoother, more balanced experience than the Intel Core i5-8600K, which struggles with encoding despite higher raw FPS. While Intel's Coffee Lake added cores, older four-thread chips like the Core i5-7600K cannot handle modern streaming loads, resulting in significant stutter. Ultimately, Ryzen's core-heavy approach provides better, more stable value for streamers, whereas Intel offers higher peak performance for single-tasking.

techspot.com

15/11/2017

Summary of the review

Assassin's Creed Origins: How Heavy is It on Your CPU?

TechSpot's CPU analysis of Assassin’s Creed Origins highlights the title as exceptionally demanding, utilizing up to 16 threads, with high-end Intel processors providing the smoothest performance. While initially reported as "unplayable" on quad-core CPUs, testing confirms that 4-core chips like the i5-7600K remain functional, albeit with performance limitations in dense, crowded areas. A significant drawback identified is the game's heavy reliance on single-threaded performance to "feed" the GPU, which caused AMD Ryzen processors to underperform relative to Intel, resulting in lower GPU utilization and fluctuating frame rates. Furthermore, high-speed memory is essential for mitigating performance drops, as lower DDR4 speeds led to noticeable frame rate losses, and achieving a locked 60 FPS requires modern, high-clocked hardware to handle the intensive, well-threaded engine.

techporn.ph

05/10/2017

Summary of the review

Intel Core i5-8600K Processor Review

The Intel Core i5-8600K, an 8th-gen "Coffee Lake" processor with six cores and 3.6 GHz base frequency, offers a significant performance boost over prior quad-core i5 models for gaming and single-threaded tasks. While lacking Hyper-Threading, the CPU excels in gaming and maintains high clock speeds, often outperforming the i7-7700K in various benchmarks. Key pros include exceptional gaming performance and strong overclocking capability, though it faces cons like high power consumption, increased operating temperatures, and lower multi-threaded productivity compared to competitors.

rockpapershotgun.com

04/07/2019

Summary of the review

Intel Core i5-8600K review: No longer the best mid-range gaming CPU

The Intel Core i5-8600K, a six-core processor with a 3.6GHz base and 4.3GHz boost, was lauded as a top-tier mid-range gaming CPU capable of outperforming rivals in 1080p and 1440p benchmarks. Its exceptional gaming performance in titles like Shadow of the Tomb Raider remains a key strength. However, at the time of review, soaring prices made it less attractive than newer, similarly performing alternatives, particularly the Core i5-9600K. While offering strong overclocking potential, the i5-8600K lacks a bundled cooler, reducing its overall value proposition compared to AMD competitors. The review concludes that despite its solid performance, its inflated cost makes it difficult to recommend when newer, cheaper, and equally capable options are available.

digitalfoundry.net

05/12/2017

Summary of the review

Intel Coffee Lake-S: Core i5 8400/ Core i5 8600K review

Digital Foundry's review highlights Intel's Coffee Lake-S Core i5-8400 and i5-8600K as a major step forward, offering significant 6-core performance gains over previous generations. The i5-8600K is lauded for high-end, overclockable gaming performance, while the i5-8400 is considered a top-value, high-performance option at its price point, often rivaling the i7-7700K. However, the review notes high platform costs due to mandatory Z370 motherboards and limited threading for heavy workstation tasks, though they remain top contenders for gaming.

techspot.com

18/10/2017

Summary of the review

Intel Core i7-8700K, i5-8600K, 8400 versus AMD Ryzen 7 & 5

According to TechSpot's review, 8th Gen Intel Core CPUs, particularly the i5-8400 and i7-8700K, reclaimed the gaming performance crown by delivering higher frame rates, often 24-30% faster than Ryzen counterparts in CPU-bound scenarios. While Intel's superior architecture and high clock speeds constitute a major pro for gaming, a drawback is the reliance on more expensive Z370 motherboards. Conversely, AMD's Ryzen shines in multi-threaded productivity tasks, offering higher core counts at better value, though it faces cons regarding higher memory latency and lower IPC in certain games.

tomshardware.com

17/10/2017

Summary of the review

Intel Core i5-8600K Review: Coffee Lake's Jolting Value

The Intel Core i5-8600K review from Tom's Hardware highlights a significant, six-core architecture shift that delivers gaming performance rivaling the previous flagship i7-7700K at a lower price point. While offering excellent, easily attainable 4.9 GHz+ overclocking capabilities, the chip's performance in heavily threaded, professional applications is somewhat limited by the lack of Hyper-Threading, often falling behind AMD's Ryzen competition. Ultimately deemed a "jolting value" for gamers, the i5-8600K's main disadvantages include the lack of a bundled cooler, higher platform costs due to Z370 motherboard requirements, and thermal management issues under extreme overclocks.

techpowerup.com

05/10/2017

Summary of the review

Intel Core i5-8600K 3.6 GHz Review

The TechPowerUp review highlights the Intel Core i5-8600K as a significant, six-core upgrade in Intel's mid-range, offering superior gaming performance. Built on the 14nm++ "Coffee Lake" architecture with high clock speeds and 9MB L3 cache, it delivers exceptional speed, though it lacks Hyper-Threading. Key advantages include market-leading gaming capability, strong overclocking potential to 5.0 GHz, and good efficiency at stock, with main downsides being the lack of a bundled cooler, the requirement for a new Z370 motherboard, and high heat/power draw when overclocked.

eteknix.com

30/10/2017

Summary of the review

Intel Core i5-8600K 8th Gen 6-Core CPU Review

The Intel Core i5-8600K introduced a significant performance leap by upgrading to six cores, directly competing with AMD's Ryzen series to deliver massive improvements in multi-tasking and productivity. The 3.6 GHz chip, featuring easy overclocking up to 5.1-5.2 GHz and strong thermal efficiency, is considered an exceptional, cost-effective all-rounder for both gaming and workstation tasks. However, the review notes the lack of Hyper-Threading keeps it behind in heavily threaded workloads, and it requires a mandatory upgrade to a Z370 motherboard. Copy

bit-tech.net

28/12/2017

Summary of the review

Intel Core i5-8600K Review

The Intel Core i5-8600K acts as a pivotal six-core, six-thread Coffee Lake CPU, delivering exceptional gaming performance that often rivals older i7 models. Pros highlighted by the review include strong multi-core performance over the previous generation, efficient soldering for better thermals, and high overclocking potential (4.8GHz+). However, the CPU’s lack of Hyper-Threading limits its dominance in heavy multi-threaded productivity tasks, where AMD's Ryzen 5 1600/1600X provide better value. Furthermore, the requirement for a new, higher-cost Z370 motherboard creates a high entry price compared to competitors. The review concludes that while the i5-8600K is a top-tier, "unchained" choice for a dedicated gaming rig, its overall competitive value is slightly dampened by strong competition in workstation tasks and higher platform costs. Copy

guru3d.com

13/10/2017

Summary of the review

Intel Core i5 8600K processor review

The Guru3D review highlights the Intel Core i5-8600K as a significant 14nm "Coffee Lake" upgrade, introducing six physical cores to the mainstream lineup with a 3.6 GHz base and 4.3 GHz turbo clock. Praised as a top-tier gaming processor, it offers high performance that rivals previous-generation i7 models, bolstered by strong multi-threaded capabilities and exceptional 5.0 GHz overclocking potential. Key disadvantages include the mandatory requirement for new Z370/300-series motherboards, the lack of Hyper-Threading limiting it to six threads, and a price premium over previous generations.

gamestar.de

11/05/2018

Summary of the review

Intel Core i5 8600K Review - The Best Core i5

The GameStar review highlights the Intel Core i5-8600K as a major upgrade, featuring six cores on the 14nm++ Coffee Lake architecture that often rivals previous i7-7700K performance. Pros include superb gaming capabilities, sitting within 5% of the i7-8700K, and high overclocking potential (5.0 GHz+) for enthusiasts. However, drawbacks include the lack of Hyper-Threading, a mandatory Z370 motherboard upgrade, and high power consumption when overclocked.

pcgameshardware.de

06/10/2017

Summary of the review

Core i7-8700K, i5-8600K and i5-8400 CPU Review: Intel at the Limit

According to PC Games Hardware, the Intel Core i7-8700K is a standout performer, setting a new benchmark for gaming with its six cores, though it brings high power consumption when overclocked and requires a new Z370 motherboard. The i5-8600K acts as the enthusiast "sweet spot," offering excellent overclocking potential to 5.0 GHz and competitive gaming speeds, but it lacks hyper-threading for heavily multi-threaded workloads. Finally, the i5-8400 offers impressive value, matching older high-end CPUs in gaming at a lower price point, despite being a locked processor that necessitates the more expensive Z370 platform initially.

hardwareluxx.de

05/10/2017

Summary of the review

Coffee Lake Review: Intel Core i7-8700K, i5-8600K and i5-8400 Tested

The Intel Coffee Lake launch, featuring the 6-core i7-8700K, i5-8600K, and i5-8400, marks a significant shift toward higher core counts on the mainstream desktop platform, utilizing a refined 14nm++ process for improved efficiency. The i7-8700K delivers excellent gaming and multi-threaded performance (up to 4.7 GHz boost), while the i5-8400 provides high value, often matching older i7s, and the "K" models show strong overclocking potential, according to Hardwareluxx. However, the lineup suffers from a lack of backwards compatibility, requiring new Z370 motherboards despite using the LGA 1151 socket, and the i7-8700K can see high power consumption and heat under load. Additionally, the platform lacked cheaper chipset options at launch, forcing users into more expensive motherboards. For more details, visit Hardwareluxx.

computerbase.de

07/11/2017

Summary of the review

Core i7-8700 and i5-8600K Review: All Coffee Lake CPUs, 'Auto OC' and DDR4-4000 Analysed

The ComputerBase review of the Intel Core i7-8700 and i5-8600K highlights a major performance leap for Intel's mainstream lineup, driven by the move to a six-core architecture. The i7-8700 delivers exceptional multi-threaded performance, often surpassing higher-core-count competitors, while the i5-8600K excels in gaming with high overclocking potential. Benefits include improved efficiency and lower operating temperatures compared to Kaby Lake, though the review notes mandatory Z370 motherboard upgrades, limited launch stock, and overly aggressive "Auto OC" power settings.

tomshardware.fr

17/10/2017

Summary of the review

Core i5-8600K Full Review: The Sweet Spot

The Intel Core i5-8600K review highlights a significant shift to six physical cores, offering exceptional gaming performance that often rivals previous-generation i7 models at a better value. The processor delivers high responsiveness and strong overclocking potential (4.9-5.0 GHz), providing substantial gains in both gaming and productivity over quad-core predecessors. However, the lack of Hyper-Threading limits its performance against competitors in heavily threaded, professional workloads, while the use of thermal paste instead of solder can lead to high temperatures under intense loads.

profesionalreview.com

14/09/2017

Summary of the review

Intel Core i5 8600K also appears on Geekbench", "Intel Core i5 8600K also surfaces on Geekbench

The Intel Core i5-8600K introduced six physical cores to the i5 lineup, offering a 3.6 GHz base frequency and 4.3 GHz boost. Early Geekbench results indicated significant multi-core performance gains, with the chip rivaling the previous-generation i7-7700K. Pros include exceptional gaming performance and strong overclocking potential, with many chips achieving 5.0 GHz to 5.2 GHz. However, the chip requires a new Z370 motherboard, lacks Hyper-Threading, and can generate high heat when overclocked, requiring premium cooling. According to Professional Review, this 8th Gen "Coffee Lake" CPU delivers a roughly 50% improvement in multi-core tasks compared to its predecessor, the i5-7600K. For more details, visit Professional Review at

elchapuzasinformatico.com

25/10/2017

Summary of the review

Intel Core i5-8600K Review - El Chapuzas Informático

The Intel Core i5-8600K review from El Chapuzas Informático highlights the 6-core/6-thread Coffee Lake processor as a top-tier mid-range option, offering significant multi-threaded improvements over previous generations with a 3.6 GHz base and 4.3 GHz turbo clock. A key pro is its excellent gaming performance and high overclocking potential (5.0 GHz+), while a notable con is the lack of Hyper-Threading and the requirement for a new Z370 chipset motherboard. Overall, the review praises its superior single-core performance despite increased power consumption and thermal output under load.

profesionalreview.com

05/10/2017

Summary of the review

Intel Core i5-8600K Review (Full Analysis)

The Intel Core i5-8600K introduced a six-core architecture to the mid-range lineup, featuring a 14nm++ "Coffee Lake" design with a 3.6 GHz base clock. It delivers substantial performance gains over previous quad-core models, specifically in multi-threaded tasks, despite lacking Hyper-Threading. The CPU offers excellent gaming performance and strong overclocking potential, often reaching 5.0 GHz or higher. Key pros include class-leading gaming performance and high single-core speeds, though it faces competition from AMD in multi-threaded productivity. Significant cons involve the requirement of a new Z370 motherboard, the absence of a bundled cooler, and lower thread counts compared to competitors.

multiplayer.it

25/10/2017

Summary of the review

Intel Core i5-8400 and i5-8600K: The Review

The Intel Core i5-8400 and i5-8600K, analyzed by Multiplayer.it, represent a significant, mainstream shift for Intel by introducing six physical cores to the 8th-generation Coffee Lake lineup. The i5-8600K caters to enthusiasts with a 3.6 GHz base clock and high overclocking potential, while the i5-8400 operates as a locked, power-efficient, and high-value alternative at 2.8 GHz. Performance tests reveal both CPUs, particularly the 8600K, often surpass the older i7-7700K in gaming and multi-threaded tasks, offering superior performance in titles like Battlefield 1. Key advantages include 50% more cores than previous generations and stellar gaming value, with the i5-8400 acting as a budget-friendly powerhouse. However, the chips require new Z370 motherboards, increasing total build costs, and lack Hyper-Threading, leaving them trailing competitors in heavy, multi-threaded workstation workloads. Furthermore, the i5-8600K does not include a stock cooler, adding to the expense for users aiming to overclock.

tomshw.it

20/10/2017

Summary of the review

Intel Core i5-8600K Review: Overclocking, Power Consumption, and Temperatures

The Intel Core i5-8600K review highlights a significant performance leap due to its six-core architecture, with gaming performance often rivaling the higher-tier i7-7700K and i7-8700K. The CPU provides excellent value for gamers and desktop users through high stock clock speeds, marking a substantial improvement over the previous quad-core generation. Overclocking is a major strength, allowing users to hit 4.9 GHz or 5.0 GHz, though this requires high-end cooling due to increased thermal and power demands. While stock consumption is efficient at around 78W, heavy, overclocked workloads can push the chip over 100W, causing potential thermal issues linked to the integrated heat spreader. Pros include excellent gaming performance, a 50% core count increase, and high overclocking headroom, while cons include a lack of Hyper-Threading and high power consumption under load. The lack of competitive multi-threaded performance in professional applications remains a weak point compared to AMD alternatives.

hwupgrade.it

05/10/2017

Summary of the review

Intel Core i7-8700K, i5-8600K and i5-8400: It's Coffee Lake Time

The 8th Generation "Coffee Lake" lineup, including the Core i7-8700K and i5-8600K/8400, represents a significant shift for Intel by introducing 6-core processors to the mainstream market to compete with AMD Ryzen. These processors deliver exceptional gaming and multi-threaded performance, with the i7-8700K leading in speed, while the i5-8400 offers high-value efficiency and the K-series processors providing strong 5.0GHz overclocking potential. However, downsides include the requirement for a new Z370 motherboard, high thermal output due to the use of TIM instead of solder, and only marginal single-core performance gains over the previous generation.

tomshw.it

20/10/2017

Summary of the review

Intel Core i5-8600K Review: Coffee Lake CPU with 6 Cores

The Intel Core i5-8600K introduced six physical cores to the mainstream i5 line, providing a substantial, "jolting" performance boost over its predecessor with a 3.6 GHz base clock and 4.3 GHz turbo. A key pro is its superior gaming performance, which often matches the more expensive Core i7-7700K. The processor is an excellent overclocker, capable of hitting 5.0 GHz or higher, though it lacks Hyper-Threading, limiting its effectiveness in heavily threaded professional applications compared to competitors. A notable con is the requirement for a new Z370 motherboard, as it is not compatible with older Z270/Z170 platforms. Operating with a 95W TDP, the i5-8600K is efficient at stock speeds but can see power consumption and heat output spike significantly when overclocked. It excels at supporting high-end gaming setups, such as the GTX 1080 Ti, without bottlenecking. Ultimately, the chip is positioned as a premier, high-value gaming CPU, offering strong performance for its era despite falling behind in raw productivity, as outlined in Tom's Hardware review.

techpulse.be

05/10/2017

Summary of the review

Intel Coffee Lake review: Core i5-8600K tested

Intel's 8th-generation "Coffee Lake" launch marks a significant shift, bringing six cores to the mainstream lineup with the Core i7-8700K and Core i5-8400, offering up to 45% better multi-threaded performance. Key advantages include exceptional "mega-tasking" capabilities, high-refresh-rate gaming, and competitive pricing that directly challenges competitors, all while utilizing the refined 14nm++ process. Conversely, the platform requires new Z370 motherboards despite using the same socket, features an outdated integrated GPU, and runs hot under load, requiring robust cooling solutions. For more details, visit TweakTown.

techgaming.nl

09/10/2017

Summary of the review

Intel Core i5-8600K Review

The Intel Core i5-8600K "Coffee Lake" processor introduces a significant upgrade to the i5 lineup with a six-core, six-thread architecture, offering a substantial performance boost over the previous quad-core i5-7600K. It provides exceptional gaming performance that often rivals older i7 flagships, making it a strong choice for mid-range gaming builds. Key pros include high single-threaded speed and impressive overclocking headroom, often reaching 5.0 GHz. However, the lack of Hyper-Threading causes the i5-8600K to underperform against competitors in heavily threaded, professional tasks like rendering. A major drawback is the requirement for a new Z370 (300-series) motherboard, reducing upgrade flexibility. Furthermore, the CPU does not come with a bundled cooler, increasing the total platform cost. For gamers looking for value, the i5-8600K is considered a solid, high-performance option despite the platform restrictions and increased competition from AMD Ryzen chips in multi-threaded scenarios.

techtesters.eu

05/10/2017

Summary of the review

Intel Core i7-8700K and Core i5-8600K Review

The TechTesters review highlights the Intel Core i7-8700K and i5-8600K as a significant 6-core transition, with the i7 offering 12 threads for heavy multitasking and the i5 providing a 6-thread, high-frequency option. While the i7-8700K excels in productivity, gaming performance between the two is remarkably close, with less than a 5% difference in most titles, despite the i7 providing superior minimum frame rates. Key pros include high clock speeds and overclocking potential, while cons center on high operating temperatures and the required Z370 motherboard, making the i7 suitable for workstation use and the i5 a top pick for value gaming.

tweakers.net

09/10/2017

Summary of the review

Intel Core i5 8600K review - The new high-end gaming standard

The Intel Core i5-8600K, as analyzed in reviews, serves as a significant mid-range milestone by shifting to six physical cores, providing a substantial 20-30% performance boost over its predecessor. Key advantages include exceptional gaming performance and strong overclocking capabilities reaching 4.8-5.0 GHz. However, the CPU requires a 300-series motherboard (e.g., Z370) despite using the same LGA1151 socket, and it lacks Hyper-Threading, placing it behind rivals in heavily threaded productivity workloads. It also necessitates an aftermarket cooler as none is included, with power consumption and heat rising significantly when overclocked. Ultimately, the i5-8600K is considered a "sweet spot" processor for high-end gaming, offering top-tier frame rates at a competitive price point, provided users invest in the required platform. The full review is available at Tweakers.net.

hardware.info

21/03/2018

Summary of the review

Intel Core i5 8600K Boxed Processor - Hardware Info

The Intel Core i5-8600K introduces a significant upgrade to Intel’s mainstream lineup by adopting a six-core, six-thread configuration on the Coffee Lake architecture. Built on an improved 14nm++ process, this processor operates at a 3.6 GHz base clock with turbo speeds up to 4.3 GHz, targeting gamers and enthusiasts seeking high-end performance without the cost of an i7. The chip delivers exceptional gaming performance that often rivals the Core i7-8700K, coupled with excellent overclocking potential frequently reaching 5.0 GHz or higher. However, the lack of Hyper-Threading leaves it behind in heavy, multi-threaded rendering tasks. A major constraint is the requirement for a new 300-series (Z370) motherboard, making it incompatible with older LGA 1151 platforms, alongside the absence of a stock cooler. Ultimately, the i5-8600K is considered a strong choice for gaming due to its 50% core count increase, high clock speeds, and overclocking headroom. Copy

hardware.info

05/10/2017

Summary of the review

Intel Core i7 8700K / i5 8600K / i5 8400 'Coffee Lake' Review

Intel's 8th-generation "Coffee Lake" processors, including the i7-8700K and i5-8400, introduced six-core configurations to the mainstream market, providing significant multi-threaded performance gains. While the lineup, particularly the 4.7 GHz i7-8700K, excels in gaming and application performance, a major downside is the requirement for new Z370 motherboards, rendering older, physically similar platforms incompatible. The i5-8600K offers a strong, overclockable alternative, delivering near-i7 performance in games, though it lacks hyper-threading for heavily multi-threaded workloads. Conversely, the i5-8400 is highlighted for its excellent value, balancing six-core performance with high power efficiency, though it is limited by a locked multiplier. Overall, the Coffee Lake series re-established Intel's performance leadership with high core counts and superior single-thread speeds, despite user frustration regarding forced platform upgrades. For the full, detailed review from the original article, you can visit Hardware.info.

tweakers.net

09/10/2017

Summary of the review

Intel Core i5-8600K Boxed - pclinde - Product reviews

The Intel Core i5-8600K review on Tweakers.net highlights a significant, long-overdue upgrade for Intel’s mainstream lineup, driven by the shift from four to six physical cores. This added "brawn" bridges the performance gap with higher-tier i7 models, offering superior multi-threaded performance compared to older quad-core predecessors. Pros highlighted include excellent gaming performance that rivals previous-generation flagships and strong overclocking potential, with the chip reaching stable 5.0GHz+ speeds easily. This makes it a high-value, "gaming beast" for enthusiasts looking for high performance without the cost of Hyper-Threading. Cons center on the lack of architectural innovation and the requirement for a new, incompatible 300-series motherboard. Furthermore, despite high core counts, the i5-8600K lacks Hyper-Threading, placing it behind competitors in heavy workstation tasks, and it does not include a stock cooler.

Third-party reviews

Based on 1,640 buyer reviews from online shops.

Reviews last updated: May 2026 · How we calculate this

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What we like about Intel Core i5 8600K

Excellent gaming performance that rivals previous-generation Core i7 models
Six physical cores offer a substantial boost for multi-threaded workloads
Superb overclocking potential, often reaching 5.0 GHz or higher with ease
High instructions per clock (IPC) and clock speeds benefit single-threaded apps
Strong value for gaming-focused builds compared to more expensive i7 chips

What we don't like about Intel Core i5 8600K

Lacks Hyper-Threading, putting it at a disadvantage in heavy content creation
Requires a new 300-series motherboard, despite using the same LGA 1151 socket
Does not include a stock cooler, adding to the total build cost
High power consumption and temperatures when pushed to high overclocks
Struggles to compete with Ryzen's value in highly threaded tasks like 3D rendering

Verdict

The Intel Core i5-8600K is an 8th-generation Coffee Lake processor featuring 6 physical cores and 6 threads with a 95W TDP. It operates at a base clock speed of 3.6 GHz and a maximum turbo boost frequency of 4.3 GHz, supported by 9 MB of L3 Smart Cache and an integrated Intel UHD Graphics 630 GPU. Main pros include its unlocked multiplier for high overclocking potential (often reaching 5.0 GHz or higher), excellent single-core gaming performance that rivalled previous-generation i7 models, and a significant 50% core count increase over its predecessor. However, main cons include its lack of Hyper-Threading, the requirement for a newer Z370/Z390 motherboard for overclocking, and the fact that it does not include a bundled thermal cooling solution.

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