IntelBX80662I56500
IntelBX80684I58600K

4 Cores, 4 Threads @3.2GHz, Skylake.
Release date: Q3 2015.

6 Cores, 6 Threads @3.6GHz, Coffee Lake.
Release date: Q4 2017.

Real World Speed
Performance profile from 130,609 user samples
70,475 User Benchmarks
Best Bench: 79% Base clock 3.2 GHz, turbo 3.2 GHz (avg)
Worst Bench: 54% Base clock 3.2 GHz, turbo 0.8 GHz (avg)
Poor: 54% Great: 79%
SPEED RANK: 124th / 1129
Gaming
Gaming 71%
Battleship
Desktop
Desktop 70%
Battle cruiser
Workstation
Workstation 43%
Speed boat
60,134 User Benchmarks
Best Bench: 120% Base clock 3.6 GHz, turbo 5.4 GHz (avg)
Worst Bench: 88% Base clock 0.8 GHz, turbo 0.8 GHz (avg)
Poor: 88% Great: 120%
SPEED RANK: 14th / 1129
Gaming
Gaming 102%
UFO
Desktop
Desktop 98%
Nuclear submarine
Workstation
Workstation 74%
Battleship
Effective Speed
Effective CPU Speed
71 % 102 % Much faster effective speed.
+43%
SC Mixed
Avg. Single Core Mixed Speed
98.5 Pts 133 Pts Much faster single-core speed.
+35%
QC Mixed
Avg. Quad Core Mixed Speed
367 Pts 517 Pts Much faster quad-core speed.
+41%
MC Mixed
Avg. Multi Core Mixed Speed
374 Pts 747 Pts Hugely faster multi-core speed.
+100%
SC Mixed
OC Single Core Mixed Speed
111 Pts 155 Pts Much faster OC single-core speed.
+40%
QC Mixed
OC Quad Core Mixed Speed
410 Pts 612 Pts Much faster OC quad-core speed.
+49%
MC Mixed
OC Multi Core Mixed Speed
412 Pts 892 Pts Hugely faster OC multi-core speed.
+117%
Market Share
Based on 11,528,185 CPUs tested.
Market Share
Market Share (trailing 30 days)
0.74 % 1.64 % Hugely higher market share.
+122%
Value
Value For Money
80.1 % 106 % Much better value.
+33%
User Rating
UBM User Rating
68 % 132 % Hugely more popular.
+94%
Price
Price (score)
$211 Cheaper.
+19%
$260
Age
Newest
37 Months 12 Months Much more recent.
+68%
TDP
Thermal Design Power (TDP)
65 Watts Much more energy efficient.
+32%
95 Watts
Cores
CPU Processing Cores
4 cores 6 cores Much higher core count.
+50%
Threads
CPU Processing Threads
4 threads 6 threads Much higher thread count.
+50%
Lithography
Manufacturing process
14 nm 14 nm
Base Clock
Base Clock Speed
3.2 GHz 3.6 GHz Slightly faster base frequency.
+12%
Turbo Clock
Turbo Clock Speed
3.6 GHz 4.3 GHz Faster turbo frequency.
+19%
SC Int
Single Core Integer Speed
106 Pts 150 Pts Much faster single-core int speed.
+42%
SC Float
Single Core Floating Point Speed
115 Pts 162 Pts Much faster single-core fp speed.
+41%
QC Int
Quad Core Integer Speed
396 Pts 586 Pts Much faster quad-core int speed.
+48%
QC Float
Quad Core Floating Point Speed
428 Pts 648 Pts Much faster quad-core fp speed.
+51%
MC Int
Multi Core Integer Speed
396 Pts 849 Pts Hugely faster multi-core int speed.
+114%
MC Float
Multi Core Floating Point Speed
429 Pts 956 Pts Hugely faster multi-core fp speed.
+123%
Series
CPU Architecture
Skylake Coffee Lake
Socket
Motherboard Socket
FCLGA1151 FCLGA1151
Graphics
Integrated Graphics
HD 530 UHD 630
Launch Date
Launch Date
Q3'15 Q4'17
Cache
Cache
6 MB SmartCache 9 MB
Instruction Set Extensions
Instruction Set Extensions
SSE4.1/4.2, AVX 2.0 SSE4.1/4.2, AVX2
Embedded Options Available
Embedded Options Available
Yes No
Recommended Price
Recommended Customer Price
$192.00 - $202.00 N/A
Thermal Solution Specification
Thermal Solution Specification
PCG 2015C (65W) PCG 2015C (130W)
Memory Types
Memory Types
DDR4-1866/2133, DDR3L-1333/1600 @ 1.35V DDR4-2666
Processor Graphics
Processor Graphics ‡
Intel® HD Graphics 530 Intel® UHD Graphics 630
Graphics Max Dynamic Frequency
Graphics Max Dynamic Frequency
1.05 GHz 1.15 GHz
PCI Express Configurations
PCI Express Configurations ‡
Up to 1x16, 2x8, 1x8+2x4 Up to 1x16 or 2x8 or 1x8+2x4

More specs » More specs »
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The unlocked hex-core i5-8600K from Intel’s latest Coffee Lake generation of processors is the new flagship of the i5 series, succeeding the Kaby Lake quad-core i5-7600K. The 8th generation of processors brings the largest performance uplift since Sandy Bridge by adding more cores at each of the i3, i5 and i7 product lines. Like the other Coffee Lake processors, the i5-8600K is built upon optimized 14nm architecture, marginally improved upon from Kaby Lake and Skylake. The 8600K has a 95W TDP and a nominal stock clock of 3.6 GHz, which boosts to 4.1 GHz for all six cores, 4.2 GHz for dual/quad and 4.3 GHz for single core. Early benchmarks put the i5-8600K’s effective speed 15% ahead of the i5-7600K. A 50% increase in multi-core speed is explained by two additional cores and thanks to the quad-core clock bump from 4 GHz on the 7600K to 4.2 GHz on the 8600K there is also an additional 5% performance boost across all workloads. All Coffee Lake processors require a 300-series chipset, making a straight CPU upgrade unfeasible despite sharing the same socket as their Z270 predecessors. Even though most games still use less than 4 cores simultaneously, the i5-8600K is a great choice for gamers (especially streamers) but for $80 less, the 8350K which is faster than last years 7600K and only marginally weaker for gaming than the 8600K is certainly well worth considering as well. [Oct '17 CPUPro]

MORE DETAILS

Processor Rankings (Price vs Performance) October 2018 CPU Rankings.

We calculate effective speed which measures real world performance for typical consumers. Effective speed is adjusted by current prices to yield a value for money rating which is geared towards gamers. Our calculated values are checked against thousands of individual user ratings. The customizable table below combines these factors to bring you the definitive list of top CPUs. [CPUPro]

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Group Test Results

  • Best user rated - User sentiment trumps benchmarks for this comparison.
  • Best value for money - Value for money is based on real world performance.
  • Fastest real world speed - Real World Speed measures performance for typical consumers.
How Fast Is Your CPU? (Bench your build) Size up your PC in less than a minute.

Welcome to our freeware PC speed test tool. UserBenchmark will test your PC and compare the results to other users with the same components. You can quickly size up your PC, identify hardware problems and explore the best upgrades.

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How it works

  • - Download and run UserBenchMark.
  • - CPU tests include: integer, floating and string.
  • - GPU tests include: six 3D game simulations.
  • - Drive tests include: read, write, sustained write and mixed IO.
  • - RAM tests include: single/multi core bandwidth and latency.
  • - Reports are generated and presented on userbenchmark.com.
  • - Identify the strongest components in your PC.
  • - See speed test results from other users.
  • - Compare your components to the current market leaders.
  • - Explore your best upgrade options with a virtual PC build.
  • - Compare your in-game FPS to other users with your hardware.
  • - Share your opinion by voting.

 Frequently Asked Questions

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CPUGPUSSD
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AMD Ryzen 5 1600 $155Nvidia GTX 1060-6GB $249Samsung 850 Evo 500GB $120
Intel Core i7-7700K $355AMD RX 480 $280Samsung 850 Pro 256GB $163
HDDRAMUSB
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Seagate Barracuda 3TB (2016) $80G.SKILL Trident Z DDR4 3200 C14 4x16GB $869SanDisk Extreme 32GB $30
Seagate Barracuda 2TB (2016) $60Corsair Vengeance LPX DDR4 3200 C16 2x8GB $145SanDisk Ultra Fit 32GB $12
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