IntelBX80662I76700K
IntelBX80684I58600K

4 Cores, 8 Threads @4.0GHz, Skylake.
Release date: Q3 2015.

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

Real World Speed
Performance profile from 257,881 user samples
209,888 User Benchmarks
Best Bench: 105% Base clock 4 GHz, turbo 4.7 GHz (avg)
Worst Bench: 77% Base clock 4 GHz, turbo 0.8 GHz (avg)
Poor: 77% Great: 105%
SPEED RANK: 33rd / 1128
Gaming
Gaming 89%
Aircraft carrier
Desktop
Desktop 90%
Nuclear submarine
Workstation
Workstation 66%
Battle cruiser
47,993 User Benchmarks
Best Bench: 118% Base clock 3.6 GHz, turbo 5.4 GHz (avg)
Worst Bench: 92% Base clock 3.6 GHz, turbo 4.05 GHz (avg)
Poor: 92% Great: 118%
SPEED RANK: 13th / 1128
Gaming
Gaming 102%
UFO
Desktop
Desktop 99%
Nuclear submarine
Workstation
Workstation 74%
Battleship
Effective Speed
Effective CPU Speed
89.1 % 102 % Slightly faster effective speed.
+15%
SC Mixed
Avg. Single Core Mixed Speed
126 Pts 133 Pts Slightly faster single-core speed.
+6%
QC Mixed
Avg. Quad Core Mixed Speed
434 Pts 522 Pts Faster quad-core speed.
+20%
MC Mixed
Avg. Multi Core Mixed Speed
673 Pts 754 Pts Slightly faster multi-core speed.
+12%
SC Mixed
OC Single Core Mixed Speed
142 Pts 154 Pts Slightly faster OC single-core speed.
+8%
QC Mixed
OC Quad Core Mixed Speed
528 Pts 600 Pts Slightly faster OC quad-core speed.
+14%
MC Mixed
OC Multi Core Mixed Speed
765 Pts 883 Pts Faster OC multi-core speed.
+15%
Market Share
Based on 10,992,177 CPUs tested.
Market Share
Market Share (trailing 30 days)
1.76 % Higher market share.
+15%
1.53 %
Value
Value For Money
83.9 % 107 % Better value.
+27%
User Rating
UBM User Rating
81 % 133 % Much more popular.
+64%
Price
Price (score)
$342 $260 Cheaper.
+24%
Age
Newest
37 Months 11 Months Much more recent.
+70%
TDP
Thermal Design Power (TDP)
91 Watts +4% 95 Watts
Cores
CPU Processing Cores
4 cores 6 cores Much higher core count.
+50%
Threads
CPU Processing Threads
8 threads Much higher thread count.
+33%
6 threads
Lithography
Manufacturing process
14 nm 14 nm
Base Clock
Base Clock Speed
4 GHz Slightly faster base frequency.
+11%
3.6 GHz
Turbo Clock
Turbo Clock Speed
4.2 GHz 4.3 GHz +2%
SC Int
Single Core Integer Speed
138 Pts 148 Pts Slightly faster single-core int speed.
+7%
SC Float
Single Core Floating Point Speed
147 Pts 161 Pts Slightly faster single-core fp speed.
+10%
QC Int
Quad Core Integer Speed
509 Pts 577 Pts Slightly faster quad-core int speed.
+13%
QC Float
Quad Core Floating Point Speed
550 Pts 642 Pts Faster quad-core fp speed.
+17%
MC Int
Multi Core Integer Speed
705 Pts 847 Pts Faster multi-core int speed.
+20%
MC Float
Multi Core Floating Point Speed
809 Pts 939 Pts Faster multi-core fp speed.
+16%
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
8 MB SmartCache 9 MB
Instruction Set Extensions
Instruction Set Extensions
SSE4.1/4.2, AVX 2.0 SSE4.1/4.2, AVX2
Recommended Price
Recommended Customer Price
$339.00 - $350.00 N/A
Thermal Solution Specification
Thermal Solution Specification
PCG 2015D (130W) 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
Hyper-Threading Tech
Intel® Hyper-Threading Technology ‡
Yes No
vPro Tech
Intel® vPro™ Technology ‡
No Yes
Stable Image Platform Program (SIPP)
Intel® Stable Image Platform Program (SIPP)
No Yes
Trusted Execution Tech
Intel® Trusted Execution Technology ‡
No Yes
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 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]

MORE DETAILS

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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Processor Rankings (Price vs Performance) September 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.
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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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  • - CPU tests include: integer, floating and string.
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  • - RAM tests include: single/multi core bandwidth and latency.
  • - Reports are generated and presented on userbenchmark.com.
  • - Identify the strongest components in your PC.
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CPUGPUSSD
Intel Core i7-8700K $370Nvidia GTX 1070 $344Samsung 850 Evo 250GB $85
AMD Ryzen 5 1600 $150Nvidia GTX 1060-6GB $260Samsung 850 Evo 500GB $114
Intel Core i5-8600K $260AMD RX 480 $280Samsung 850 Pro 256GB $163
HDDRAMUSB
Seagate Barracuda 1TB (2016) $43Corsair Vengeance LPX DDR4 3000 C15 2x8GB $150SanDisk Extreme 64GB $80
Seagate Barracuda 3TB (2016) $80G.SKILL Trident Z DDR4 3200 C14 4x16GB $898SanDisk Extreme 32GB $30
WD Blue 1TB (2012) $39Corsair Vengeance LPX DDR4 3200 C16 2x8GB $167SanDisk Ultra Fit 32GB $11
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