IntelBX80684I78700K
IntelBX80662I76700K

6 Cores, 12 Threads
@3.7GHz Coffee Lake (2017)

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

Real World Speed
Performance profile from 307,664 user samples
105,898 User Benchmarks
Best Bench: 124% Base clock 3.7 GHz, turbo 5.15 GHz (avg)
Worst Bench: 93% Base clock 3.7 GHz, turbo 0.8 GHz (avg)
Poor: 93% Great: 124%
SPEED RANK: 7th / 1117
Gaming
Gaming 107%
UFO
Desktop
Desktop 105%
UFO
Workstation
Workstation 95%
Nuclear submarine
201,766 User Benchmarks
Best Bench: 103% Base clock 4 GHz, turbo 4.8 GHz (avg)
Worst Bench: 77% Base clock 4 GHz, turbo 0.2 GHz (avg)
Poor: 77% Great: 103%
SPEED RANK: 34th / 1117
Gaming
Gaming 89%
Aircraft carrier
Desktop
Desktop 91%
Nuclear submarine
Workstation
Workstation 67%
Battle cruiser
Effective Speed
Effective CPU Speed
107 % Faster effective speed.
+21%
89 %
SC Mixed
Avg. Single Core Mixed Speed
137 Pts Slightly faster single-core speed.
+8%
127 Pts
QC Mixed
Avg. Quad Core Mixed Speed
522 Pts Faster quad-core speed.
+21%
431 Pts
MC Mixed
Avg. Multi Core Mixed Speed
1077 Pts Much faster multi-core speed.
+59%
676 Pts
SC Mixed
OC Single Core Mixed Speed
155 Pts Slightly faster OC single-core speed.
+9%
142 Pts
QC Mixed
OC Quad Core Mixed Speed
610 Pts Faster OC quad-core speed.
+17%
521 Pts
MC Mixed
OC Multi Core Mixed Speed
1243 Pts Much faster OC multi-core speed.
+62%
768 Pts
Market Share
Based on 9,824,317 CPUs tested.
Market Share
Market Share (trailing 30 days)
4.28 % Hugely higher market share.
+152%
1.7 %
Value
Value For Money
104 % Better value.
+26%
82.4 %
User Rating
UBM User Rating
148 % Hugely more popular.
+103%
73 %
Price
Price (score)
$320 Slightly cheaper.
+11%
$359
Age
Newest
9 Months Much more recent.
+74%
35 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
12 threads Much higher thread count.
+50%
8 threads
Lithography
Manufacturing process
14 nm 14 nm
Base Clock
Base Clock Speed
3.7 GHz 4 GHz Slightly faster base frequency.
+8%
Turbo Clock
Turbo Clock Speed
4.7 GHz Slightly faster turbo frequency.
+12%
4.2 GHz
SC Int
Single Core Integer Speed
150 Pts Slightly faster single-core int speed.
+9%
138 Pts
SC Float
Single Core Floating Point Speed
159 Pts Slightly faster single-core fp speed.
+8%
147 Pts
QC Int
Quad Core Integer Speed
594 Pts Faster quad-core int speed.
+16%
512 Pts
QC Float
Quad Core Floating Point Speed
630 Pts Faster quad-core fp speed.
+16%
542 Pts
MC Int
Multi Core Integer Speed
1144 Pts Much faster multi-core int speed.
+62%
706 Pts
MC Float
Multi Core Floating Point Speed
1313 Pts Much faster multi-core fp speed.
+62%
808 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
12 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
Graphics Max Dynamic Frequency
Graphics Max Dynamic Frequency
1.20 GHz 1.15 GHz
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 i7-8700K is Intel’s latest, top of the range, 8th generation Coffee Lake processor. Like Kaby Lake and Sky Lake before that, Coffee Lake is based on Intel’s 14nm architecture which has been slightly optimized on each iteration. Following AMD’s modus operandi, Intel has upped the cores and threads across the range of their CPUs. In previous generations, a 6-core processor would have been a high-end desk-top (HEDT) processor, however the i7-8700K is the first Intel CPU with 6 cores and 12 threads to be classified (and priced) as a mainstream consumer processor. Specifically, the i7-8700K features a base clock speed of 3.7 GHz which boosts to 4.7 GHz (4.5 GHz for the previous generation i7-7700k), 12MB of smart (L3) cache and 2 channels of DDR4 RAM. The majority of the performance improvements over the 7th generation stem from the higher core count which results in a 50% increase in multi-core speed between the i7-7700k and i7-8700k. A new motherboard will need to be factored into the budget when upgrading to the 8700K as it requires a new Intel Z370 chipset which has supposedly been designed to better deliver power to CPUs with a greater number of cores. Also available in this latest release of CPUs is the 6 core 6 thread i5-8600k which is a more rational option (around $100 cheaper) for the vast majority of users that don’t require hyper-threading. Sandy bridge owners can finally justify an upgrade but with the next iteration of AMD's Zen architecture just around the corner the CPU market will be a lot faster moving now that Intel, once again, has to compete. [Sep '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) July 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.
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  • - See speed test results from other users.
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  • - Share your opinion by voting.

 Frequently Asked Questions

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CPUGPUSSD
Intel Core i7-8700K $320Nvidia GTX 1070 $413Samsung 850 Evo 250GB $100
AMD Ryzen 5 1600 $150Nvidia GTX 1060-6GB $289Samsung 850 Evo 500GB $121
Intel Core i7-7700K $300AMD RX 480 $280Samsung 850 Pro 256GB $136
HDDRAMUSB
Seagate Barracuda 1TB (2016) $44Corsair Vengeance LPX DDR4 3000 C15 2x8GB $176SanDisk Extreme 64GB $44
Seagate Barracuda 3TB (2016) $80G.SKILL Trident Z DDR4 3200 C14 4x16GB $951SanDisk Extreme 32GB $46
Seagate Barracuda 2TB (2016) $58HyperX Fury DDR4 2133 C14 2x8GB $219SanDisk Ultra Fit 32GB $12
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