IntelBX80684I78700K
IntelBX80646I74790K

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

Real World Speed
Performance profile from 145,260 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
123,471 User Benchmarks
Best Bench: 100% Base clock 4.8 GHz, turbo 5.75 GHz (avg)
Worst Bench: 74% Base clock 4 GHz
Poor: 74% Great: 100%
SPEED RANK: 31st / 981
Gaming
Gaming 88%
Aircraft carrier
Desktop
Desktop 89%
Aircraft carrier
Workstation
Workstation 64%
Destroyer
Effective Speed
Effective CPU Speed
111 % Faster effective speed.
+26%
87.6 % -26%
SC Mixed
Avg. Single Core Mixed Speed
140 Pts Slightly faster single-core speed.
+13%
124 Pts -13%
QC Mixed
Avg. Quad Core Mixed Speed
540 Pts Faster quad-core speed.
+26%
429 Pts -26%
MC Mixed
Avg. Multi Core Mixed Speed
1101 Pts Much faster multi-core speed.
+72%
640 Pts -72%
SC Mixed
OC Single Core Mixed Speed
157 Pts Slightly faster OC single-core speed.
+13%
139 Pts -13%
QC Mixed
OC Quad Core Mixed Speed
622 Pts Faster OC quad-core speed.
+23%
506 Pts -23%
MC Mixed
OC Multi Core Mixed Speed
1259 Pts Much faster OC multi-core speed.
+73%
727 Pts -73%
Market Share
Based on 6,916,752 CPUs tested.
Market Share
Market Share (trailing 30 days)
3.09 % Hugely higher market share.
+81%
1.71 % -81%
Value
Value For Money
100 % Better value.
+24%
81 % -24%
User Rating
UBM User Rating
84 % -18% 99 % More popular.
+18%
Price
Price (score)
$379 -5% $360 Slightly cheaper.
+5%
Age
Newest
3 Months Hugely more recent.
+93%
43 Months -93%
TDP
Thermal Design Power (TDP)
95 Watts -7% 88 Watts Slightly more energy efficient.
+7%
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 Much newer manufacturing.
+36%
22 nm -36%
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.
+7%
4.4 GHz -7%
SC Int
Single Core Integer Speed
154 Pts Slightly faster single-core int speed.
+11%
139 Pts -11%
SC Float
Single Core Floating Point Speed
160 Pts Faster single-core fp speed.
+16%
138 Pts -16%
QC Int
Quad Core Integer Speed
610 Pts Faster quad-core int speed.
+21%
506 Pts -21%
QC Float
Quad Core Floating Point Speed
636 Pts Faster quad-core fp speed.
+24%
511 Pts -24%
MC Int
Multi Core Integer Speed
1162 Pts Much faster multi-core int speed.
+68%
690 Pts -68%
MC Float
Multi Core Floating Point Speed
1333 Pts Hugely faster multi-core fp speed.
+81%
737 Pts -81%
Series
CPU Architecture
Coffee Lake (2017) Haswell (2013)
Socket
Motherboard Socket
FCLGA1151 FCLGA1150
Graphics
Integrated Graphics
UHD 630 HD 4600
Launch Date
Launch Date
Q4'17 Q2'14
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
Lithography
Lithography
14 nm 22 nm
Recommended Price
Recommended Customer Price
N/A $339.00 - $350.00
Bus Speed
Bus Speed
8 GT/s DMI3 5 GT/s DMI2
Thermal Solution Specification
Thermal Solution Specification
PCG 2015C (130W) PCG 2013D
Max Memory Size
Max Memory Size (dependent on memory type)
64 GB 32 GB
Memory Types
Memory Types
DDR4-2666 DDR3-1333/1600, DDR3L-1333/1600 @ 1.5V
Processor Graphics
Processor Graphics ‡
Intel® UHD Graphics 630 Intel® HD Graphics 4600
Graphics Max Dynamic Frequency
Graphics Max Dynamic Frequency
1.20 GHz 1.25 GHz
Graphics Video Max Memory
Graphics Video Max Memory
64 GB 2 GB
TSX-NI
Intel® TSX-NI
Yes No
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 Intel Core i7-4790K, codenamed Devil's Canyon, is an upgraded 4770K, Intel's current flagship i7. The 4790K features an improved thermal interface which enables it to dissipate heat more efficiently than the 4770K. Comparing the 4770K and 4790K shows that stock performance has improved by 13% which is consistent with the base clock jump from 3.5 GHz to 4.0 GHz. OC performance remains unchanged. Comparing the 4790K and 4790 shows that at stock clocks the 4790K is around 16% faster which considering the small price difference makes the 4790K a far better choice. Previously Intel targeted the unlocked K versions at overclockers but with Devil's Canyon they have included VT-d on the K chip and this time it's squarely aimed at both power users and overclockers alike. Until the release of Broadwell in six months, the 4790K is the high end CPU of choice. [Jul '14 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.
  • - 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.

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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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