IntelBX80662I56500
IntelBX80684I58600K

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

VS
About

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

Real World Speed
Performance profile from 228,791 user samples
110,378 User Benchmarks
Best Bench: 64% Base clock 3.2 GHz, turbo 3.2 GHz (avg)
Worst Bench: 41% Base clock 3.2 GHz
Poor: 41% Great: 64%
SPEED RANK: 205th / 1182
Gaming
Gaming 57%
Gunboat
Desktop
Desktop 66%
Battle cruiser
Workstation
Workstation 35%
Sail boat
118,413 User Benchmarks
Best Bench: 106% Base clock 3.6 GHz, turbo 5.4 GHz (avg)
Worst Bench: 78% Base clock 3.6 GHz, turbo 2 GHz (avg)
Poor: 78% Great: 106%
SPEED RANK: 17th / 1182
Gaming
Gaming 91%
Nuclear submarine
Desktop
Desktop 92%
Nuclear submarine
Workstation
Workstation 65%
Destroyer
Effective Speed
Effective CPU Speed
56.8 % 90.7 % Much faster effective speed.
+60%
1-Core
Avg. Single Core Mixed Speed
96.9 Pts 133 Pts Much faster single-core speed.
+37%
2-Core
Avg. Dual Core Mixed Speed
192 Pts 264 Pts Much faster dual-core speed.
+38%
4-Core
Avg. Quad Core Mixed Speed
353 Pts 517 Pts Much faster quad-core speed.
+46%
8-Core
Avg. Octa Core Mixed Speed
360 Pts 735 Pts Hugely faster octa-core speed.
+104%
64-Core
Avg. Multi Core Mixed Speed
364 Pts 741 Pts Hugely faster 64-core speed.
+104%
1-Core
OC Single Core Mixed Speed
110 Pts 155 Pts Much faster OC single-core speed.
+41%
2-Core
OC Dual Core Mixed Speed
213 Pts 308 Pts Much faster OC dual-core speed.
+45%
4-Core
OC Quad Core Mixed Speed
404 Pts 604 Pts Much faster OC quad-core speed.
+50%
8-Core
OC Octa Core Mixed Speed
405 Pts 878 Pts Hugely faster OC octa-core speed.
+117%
64-Core
OC Multi Core Mixed Speed
408 Pts 879 Pts Hugely faster OC 64-core speed.
+115%
Market Share
Based on 19,404,473 CPUs tested.
Market Share
Market Share (trailing 30 days)
0.66 % 0.71 % Slightly higher market share.
+8%
Value
Value For Money
68.1 % 95.5 % Much better value.
+40%
User Rating
UBM User Rating
68 % 75 % Slightly more popular.
+10%
Price
Price (score)
$144 Much cheaper.
+37%
$230
Age
Newest
47 Months 22 Months Much more recent.
+53%
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%
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) August 2019 CPU Rankings.

We calculate effective speed which measures real world performance for typical gamers and desktop users. 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.

UserBenchmark of the month

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

 Best User Rated

The Best.
CPUGPUSSD
AMD Ryzen 5 3600 $198Nvidia GTX 1070 $400Samsung 850 Evo 250GB $86
Intel Core i5-9400F $143Nvidia GTX 1060-6GB $270Samsung 850 Evo 500GB $103
Intel Core i5-9600K $230Nvidia GTX 1080-Ti $750Samsung 850 Pro 256GB $195
HDDRAMUSB
Seagate Barracuda 1TB (2016) $40Corsair Vengeance LPX DDR4 3000 C15 2x8GB $75SanDisk Extreme 64GB $128
WD Blue 1TB (2012) $40G.SKILL Trident Z DDR4 3200 C14 4x16GB $695SanDisk Extreme 32GB $48
Seagate Barracuda 3TB (2016) $80Corsair Vengeance LPX DDR4 3200 C16 2x8GB $80SanDisk Extreme 16GB $24
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