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 192,130 user samples
21,789 User Benchmarks
Best Bench: 126% Base clock 3.7 GHz, turbo 5 GHz (avg)
Worst Bench: 95% Base clock 3.7 GHz, turbo 0.8 GHz (avg)
Poor: 95% Great: 126%
SPEED RANK: 5th / 981
Gaming
Gaming 111%
UFO
Desktop
Desktop 107%
UFO
Workstation
Workstation 97%
Nuclear submarine
170,341 User Benchmarks
Best Bench: 106% Base clock 4 GHz, turbo 4.6 GHz (avg)
Worst Bench: 80% Base clock 4 GHz, turbo 0.65 GHz (avg)
Poor: 80% Great: 106%
SPEED RANK: 23rd / 981
Gaming
Gaming 93%
Nuclear submarine
Desktop
Desktop 93%
Nuclear submarine
Workstation
Workstation 68%
Battle cruiser
Effective Speed
Effective CPU Speed
111 % Faster effective speed.
+20%
92.6 % -20%
SC Mixed
Avg. Single Core Mixed Speed
140 Pts Slightly faster single-core speed.
+8%
130 Pts -8%
QC Mixed
Avg. Quad Core Mixed Speed
540 Pts Faster quad-core speed.
+19%
454 Pts -19%
MC Mixed
Avg. Multi Core Mixed Speed
1101 Pts Much faster multi-core speed.
+60%
688 Pts -60%
SC Mixed
OC Single Core Mixed Speed
157 Pts Slightly faster OC single-core speed.
+9%
144 Pts -9%
QC Mixed
OC Quad Core Mixed Speed
622 Pts Faster OC quad-core speed.
+16%
536 Pts -16%
MC Mixed
OC Multi Core Mixed Speed
1259 Pts Much faster OC multi-core speed.
+62%
777 Pts -62%
Market Share
Based on 6,916,752 CPUs tested.
Market Share
Market Share (trailing 30 days)
3.09 % Much higher market share.
+41%
2.19 % -41%
Value
Value For Money
100 % Slightly better value.
+10%
91.6 % -10%
User Rating
UBM User Rating
84 % -30% 109 % More popular.
+30%
Price
Price (score)
$379 -21% $300 Cheaper.
+21%
Age
Newest
3 Months Hugely more recent.
+90%
29 Months -90%
TDP
Thermal Design Power (TDP)
95 Watts -4% 91 Watts +4%
Cores
CPU Processing Cores
6 cores Much higher core count.
+50%
4 cores -50%
Threads
CPU Processing Threads
12 threads Much higher thread count.
+50%
8 threads -50%
Lithography
Manufacturing process
14 nm 0% 14 nm 0%
Base Clock
Base Clock Speed
3.7 GHz -8% 4 GHz Slightly faster base frequency.
+8%
Turbo Clock
Turbo Clock Speed
4.7 GHz Slightly faster turbo frequency.
+12%
4.2 GHz -12%
SC Int
Single Core Integer Speed
154 Pts Slightly faster single-core int speed.
+8%
142 Pts -8%
SC Float
Single Core Floating Point Speed
160 Pts Slightly faster single-core fp speed.
+9%
147 Pts -9%
QC Int
Quad Core Integer Speed
610 Pts Faster quad-core int speed.
+17%
523 Pts -17%
QC Float
Quad Core Floating Point Speed
636 Pts Faster quad-core fp speed.
+15%
551 Pts -15%
MC Int
Multi Core Integer Speed
1162 Pts Much faster multi-core int speed.
+62%
718 Pts -62%
MC Float
Multi Core Floating Point Speed
1333 Pts Much faster multi-core fp speed.
+63%
816 Pts -63%
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) January 2018 CPU Rankings.

Welcome to our desktop CPU comparison. We calculate effective speed which measures real world performance for typical consumers. Effective speed is adjusted by price to yield a value for money rating which is geared towards gamers. Calculated values don't always paint the whole picture so we check them against hundreds of individual user ratings. The customizable table below combines these factors and more to bring you the definitive list of top CPUs. [CPUPro]

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.
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  • - 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.
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  • - Compare your components to the highest voted in class.
  • - Find the best upgrades.
  • - Share your opinion by voting.

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CPUGPUSSD
Intel Core i7-7700K $280Nvidia GTX 1070 $430Samsung 850 Evo 250GB $90
AMD Ryzen 7 1700 $290Nvidia GTX 1060-6GB $275Samsung 850 Evo 500GB $140
Intel Core i5-7600K $210AMD RX 480 $400Samsung 850 Pro 256GB $110
HDDRAMUSB
Seagate Barracuda 1TB (2016) $45Corsair Vengeance LPX DDR4 3000 C15 2x8GB $205SanDisk Extreme 64GB $50
Seagate Barracuda 3TB (2016) $80G.SKILL Trident Z DDR4 3200 C14 4x16GB $931SanDisk Extreme 32GB $22
Seagate Barracuda 7200.14 1TB $52Corsair Vengeance LPX DDR4 3200 C16 2x8GB $220SanDisk Ultra Fit 32GB $12
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