IntelBX80684I58600K
IntelBX80662I76700K

6 Cores, 6 Threads
@3.6GHz Coffee Lake (2017)

4 Cores, 8 Threads
@4.0GHz Skylake (2015)

Real World Speed
Performance profile from 237,352 user samples
31,884 User Benchmarks
Best Bench: 121% Base clock 3.6 GHz, turbo 5.2 GHz (avg)
Worst Bench: 92% Base clock 0.8 GHz, turbo 0.8 GHz (avg)
Poor: 92% Great: 121%
SPEED RANK: 10th / 1110
Gaming
Gaming 104%
UFO
Desktop
Desktop 100%
Nuclear submarine
Workstation
Workstation 75%
Battleship
205,468 User Benchmarks
Best Bench: 106% Base clock 4 GHz, turbo 4.6 GHz (avg)
Worst Bench: 75% Base clock 4 GHz, turbo 0.8 GHz (avg)
Poor: 75% Great: 106%
SPEED RANK: 33rd / 1110
Gaming
Gaming 91%
Nuclear submarine
Desktop
Desktop 92%
Nuclear submarine
Workstation
Workstation 67%
Battle cruiser
Effective Speed
Effective CPU Speed
104 % Slightly faster effective speed.
+15%
90.6 %
SC Mixed
Avg. Single Core Mixed Speed
135 Pts Slightly faster single-core speed.
+5%
128 Pts
QC Mixed
Avg. Quad Core Mixed Speed
529 Pts Faster quad-core speed.
+19%
443 Pts
MC Mixed
Avg. Multi Core Mixed Speed
765 Pts Slightly faster multi-core speed.
+14%
671 Pts
SC Mixed
OC Single Core Mixed Speed
157 Pts Slightly faster OC single-core speed.
+9%
144 Pts
QC Mixed
OC Quad Core Mixed Speed
619 Pts Faster OC quad-core speed.
+16%
532 Pts
MC Mixed
OC Multi Core Mixed Speed
903 Pts Faster OC multi-core speed.
+18%
766 Pts
Market Share
Based on 9,333,286 CPUs tested.
Market Share
Market Share (trailing 30 days)
1.46 % 1.79 % Higher market share.
+23%
Value
Value For Money
112 % Much better value.
+31%
85.7 %
User Rating
UBM User Rating
118 % Much more popular.
+71%
69 %
Price
Price (score)
$238 Cheaper.
+30%
$339
Age
Newest
8 Months Much more recent.
+76%
34 Months
TDP
Thermal Design Power (TDP)
95 Watts 91 Watts +4%
Cores
CPU Processing Cores
6 cores Much higher core count.
+50%
4 cores
Threads
CPU Processing Threads
6 threads 8 threads Much higher thread count.
+33%
Lithography
Manufacturing process
14 nm 14 nm
Base Clock
Base Clock Speed
3.6 GHz 4 GHz Slightly faster base frequency.
+11%
Turbo Clock
Turbo Clock Speed
4.3 GHz +2% 4.2 GHz
SC Int
Single Core Integer Speed
153 Pts Slightly faster single-core int speed.
+8%
142 Pts
SC Float
Single Core Floating Point Speed
162 Pts Slightly faster single-core fp speed.
+10%
147 Pts
QC Int
Quad Core Integer Speed
597 Pts Slightly faster quad-core int speed.
+14%
523 Pts
QC Float
Quad Core Floating Point Speed
648 Pts Faster quad-core fp speed.
+18%
551 Pts
MC Int
Multi Core Integer Speed
864 Pts Faster multi-core int speed.
+22%
711 Pts
MC Float
Multi Core Floating Point Speed
956 Pts Faster multi-core fp speed.
+18%
809 Pts
Series
CPU Architecture
Coffee Lake (2017) Skylake (2015)
Socket
Motherboard Socket
FCLGA1151 FCLGA1151
Graphics
Integrated Graphics
UHD 630 HD 530
Launch Date
Launch Date
Q4'17 Q3'15
Cache
Cache
9 MB 8 MB SmartCache
Instruction Set Extensions
Instruction Set Extensions
SSE4.1/4.2, AVX2 SSE4.1/4.2, AVX 2.0
Recommended Price
Recommended Customer Price
N/A $339.00 - $350.00
Thermal Solution Specification
Thermal Solution Specification
PCG 2015C (130W) PCG 2015D (130W)
Memory Types
Memory Types
DDR4-2666 DDR4-1866/2133, DDR3L-1333/1600 @ 1.35V
Processor Graphics
Processor Graphics ‡
Intel® UHD Graphics 630 Intel® HD Graphics 530
Hyper-Threading Tech
Intel® Hyper-Threading Technology ‡
No Yes
vPro Tech
Intel® vPro™ Technology ‡
Yes No
Stable Image Platform Program (SIPP)
Intel® Stable Image Platform Program (SIPP)
Yes No
Trusted Execution Tech
Intel® Trusted Execution Technology ‡
Yes No
PCI Express Configurations
PCI Express Configurations ‡
Up to 1x16 or 2x8 or 1x8+2x4 Up to 1x16, 2x8, 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]

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The Core i7-6700K is Intel's latest "Skylake" flagship processor. It replaces the hugely successful i7-4790K and takes the crown as the fastest mainstream consumer CPU available. Comparing performance and specs between the 4790K and 6700K shows that the configuration is largely unchanged (same base clocks, cores, threads) but the improved manufacturing process (14nm) brings a small reduction in TDP and a performance improvement of 8%; almost exactly the same jump as between the Ivy Bridge 3770K and Haswell 4770K. Owners of any unlocked-K Intel CPU from Sandy Bridge or onwards still have no real reason to upgrade as the performance improvements are largely academic but the i7-6700K will be the CPU of choice for the vast majority of top end PC builds in 2015. [Aug '15 CPUPro]

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Processor Rankings (Price vs Performance) June 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.
  • Fastest real world speed - Real World Speed measures performance for typical consumers.
  • Best value for money - Value for money is based on real world performance and price.
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 (UBM).
  • - CPU tests include: integer, floating and string.
  • - GPU tests include: six 3D game simulations.
  • - Drive tests include: read, write and mixed IO.
  • - Checks include: 4k Align, NCQ, TRIM, SATA, USB & S.M.A.R.T.
  • - 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 highest voted in class.
  • - Find the best upgrades.
  • - Share your opinion by voting.

 Frequently Asked Questions

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CPUGPUSSD
AMD Ryzen 5 1600 $170Nvidia GTX 1070 $420Samsung 850 Evo 250GB $104
Intel Core i7-8700K $320Nvidia GTX 1060-6GB $250Samsung 850 Evo 500GB $138
Intel Core i5-8600K $238AMD RX 480 $280Samsung 850 Pro 256GB $121
HDDRAMUSB
Seagate Barracuda 1TB (2016) $43Corsair Vengeance LPX DDR4 3000 C15 2x8GB $177SanDisk Extreme 64GB $44
Seagate Barracuda 3TB (2016) $80G.SKILL Trident Z DDR4 3200 C14 4x16GB $911SanDisk Extreme 32GB $30
Seagate Barracuda 2TB (2016) $59HyperX Fury DDR4 2133 C14 2x8GB $226SanDisk Ultra Fit 32GB $12
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