IntelBX80662I76700K
IntelBX80646I74790K

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

4 Cores, 8 Threads @4.0GHz, Haswell.
Release date: Q2 2014.

Real World Speed
Performance profile from 522,908 user samples
307,048 User Benchmarks
Best Bench: 103% Base clock 4 GHz, turbo 4.8 GHz (avg)
Worst Bench: 70% Base clock 2.1 GHz, turbo 0.8 GHz (avg)
Poor: 70% Great: 103%
SPEED RANK: 61st / 1158
Gaming
Gaming 87%
Aircraft carrier
Desktop
Desktop 89%
Aircraft carrier
Workstation
Workstation 64%
Destroyer
215,860 User Benchmarks
Best Bench: 100% Base clock 4 GHz, turbo 4.9 GHz (avg)
Worst Bench: 69% Base clock 4 GHz, turbo 1.05 GHz (avg)
Poor: 69% Great: 100%
SPEED RANK: 64th / 1158
Gaming
Gaming 86%
Aircraft carrier
Desktop
Desktop 88%
Aircraft carrier
Workstation
Workstation 63%
Destroyer
Effective Speed
Effective CPU Speed
87.1 % +1% 86.4 %
SC Mixed
Avg. Single Core Mixed Speed
124 Pts +1% 123 Pts
QC Mixed
Avg. Quad Core Mixed Speed
424 Pts +0% 422 Pts
MC Mixed
Avg. Multi Core Mixed Speed
645 Pts +2% 630 Pts
SC Mixed
OC Single Core Mixed Speed
142 Pts +3% 138 Pts
QC Mixed
OC Quad Core Mixed Speed
519 Pts +2% 511 Pts
MC Mixed
OC Multi Core Mixed Speed
750 Pts +5% 715 Pts
Market Share
Based on 17,786,142 CPUs tested.
Market Share
Market Share (trailing 30 days)
1.56 % Higher market share.
+18%
1.32 %
Value
Value For Money
88.7 % Slightly better value.
+12%
79.4 %
User Rating
UBM User Rating
86 % 101 % More popular.
+17%
Price
Price (score)
$278 Cheaper.
+24%
$365
Age
Newest
46 Months More recent.
+23%
60 Months
TDP
Thermal Design Power (TDP)
91 Watts 88 Watts +3%
Cores
CPU Processing Cores
4 cores 4 cores
Threads
CPU Processing Threads
8 threads 8 threads
Lithography
Manufacturing process
14 nm Much newer manufacturing.
+36%
22 nm
Base Clock
Base Clock Speed
4 GHz 4 GHz
Turbo Clock
Turbo Clock Speed
4.2 GHz 4.4 GHz +5%
SC Int
Single Core Integer Speed
138 Pts 138 Pts
SC Float
Single Core Floating Point Speed
146 Pts Slightly faster single-core fp speed.
+6%
138 Pts
QC Int
Quad Core Integer Speed
503 Pts 515 Pts +2%
QC Float
Quad Core Floating Point Speed
535 Pts +4% 516 Pts
MC Int
Multi Core Integer Speed
682 Pts +0% 681 Pts
MC Float
Multi Core Floating Point Speed
802 Pts Slightly faster multi-core fp speed.
+10%
729 Pts
Series
CPU Architecture
Skylake Haswell
Socket
Motherboard Socket
FCLGA1151 FCLGA1150
Graphics
Integrated Graphics
HD 530 HD 4600
Launch Date
Launch Date
Q3'15 Q2'14
Lithography
Lithography
14 nm 22 nm
Bus Speed
Bus Speed
8 GT/s DMI3 5 GT/s DMI2
Thermal Solution Specification
Thermal Solution Specification
PCG 2015D (130W) PCG 2013D
Max Memory Size
Max Memory Size (dependent on memory type)
64 GB 32 GB
Memory Types
Memory Types
DDR4-1866/2133, DDR3L-1333/1600 @ 1.35V DDR3-1333/1600, DDR3L-1333/1600 @ 1.5V
Memory Bandwidth
Max Memory Bandwidth
34.1 GB/s 25.6 GB/s
Processor Graphics
Processor Graphics ‡
Intel® HD Graphics 530 Intel® HD Graphics 4600
Graphics Output
Graphics Output
eDP/DP/HDMI/DVI eDP/DP/HDMI/DVI/VGA
Graphics Max Dynamic Frequency
Graphics Max Dynamic Frequency
1.15 GHz 1.25 GHz
Graphics Video Max Memory
Graphics Video Max Memory
64 GB 2 GB
Graphics and IMC Lithography
Graphics and IMC Lithography
14 nm 22 nm
TSX-NI
Intel® TSX-NI
Yes No

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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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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) June 2019 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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