IntelBX80646I74790K
IntelBX80662I76700K

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

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

Real World Speed
Performance profile from 387,304 user samples
156,809 User Benchmarks
Best Bench: 99% Base clock 4 GHz, turbo 4.8 GHz (avg)
Worst Bench: 69% Base clock 4 GHz, turbo 0.8 GHz (avg)
Poor: 69% Great: 99%
SPEED RANK: 45th / 1129
Gaming
Gaming 85%
Aircraft carrier
Desktop
Desktop 86%
Aircraft carrier
Workstation
Workstation 63%
Destroyer
230,495 User Benchmarks
Best Bench: 102% Base clock 4 GHz, turbo 4.7 GHz (avg)
Worst Bench: 76% Base clock 4 GHz, turbo 0.8 GHz (avg)
Poor: 76% Great: 102%
SPEED RANK: 34th / 1129
Gaming
Gaming 89%
Aircraft carrier
Desktop
Desktop 90%
Nuclear submarine
Workstation
Workstation 66%
Battle cruiser
Effective Speed
Effective CPU Speed
85.1 % 88.9 % +4%
SC Mixed
Avg. Single Core Mixed Speed
121 Pts 126 Pts +4%
QC Mixed
Avg. Quad Core Mixed Speed
415 Pts 432 Pts +4%
MC Mixed
Avg. Multi Core Mixed Speed
631 Pts 669 Pts Slightly faster multi-core speed.
+6%
SC Mixed
OC Single Core Mixed Speed
135 Pts 142 Pts Slightly faster OC single-core speed.
+5%
QC Mixed
OC Quad Core Mixed Speed
503 Pts 514 Pts +2%
MC Mixed
OC Multi Core Mixed Speed
719 Pts 757 Pts Slightly faster OC multi-core speed.
+5%
Market Share
Based on 11,544,618 CPUs tested.
Market Share
Market Share (trailing 30 days)
1.58 % 1.95 % Higher market share.
+23%
Value
Value For Money
78.3 % 88.5 % Slightly better value.
+13%
User Rating
UBM User Rating
92 % Slightly more popular.
+14%
81 %
Price
Price (score)
$365 $295 Cheaper.
+19%
Age
Newest
52 Months 38 Months More recent.
+27%
TDP
Thermal Design Power (TDP)
88 Watts +3% 91 Watts
Cores
CPU Processing Cores
4 cores 4 cores
Threads
CPU Processing Threads
8 threads 8 threads
Lithography
Manufacturing process
22 nm 14 nm Much newer manufacturing.
+36%
Base Clock
Base Clock Speed
4 GHz 4 GHz
Turbo Clock
Turbo Clock Speed
4.4 GHz +5% 4.2 GHz
SC Int
Single Core Integer Speed
136 Pts 138 Pts +1%
SC Float
Single Core Floating Point Speed
137 Pts 147 Pts Slightly faster single-core fp speed.
+7%
QC Int
Quad Core Integer Speed
508 Pts +1% 501 Pts
QC Float
Quad Core Floating Point Speed
506 Pts 535 Pts Slightly faster quad-core fp speed.
+6%
MC Int
Multi Core Integer Speed
683 Pts 693 Pts +1%
MC Float
Multi Core Floating Point Speed
732 Pts 807 Pts Slightly faster multi-core fp speed.
+10%
Series
CPU Architecture
Haswell Skylake
Socket
Motherboard Socket
FCLGA1150 FCLGA1151
Graphics
Integrated Graphics
HD 4600 HD 530
Launch Date
Launch Date
Q2'14 Q3'15
Lithography
Lithography
22 nm 14 nm
Bus Speed
Bus Speed
5 GT/s DMI2 8 GT/s DMI3
Thermal Solution Specification
Thermal Solution Specification
PCG 2013D PCG 2015D (130W)
Max Memory Size
Max Memory Size (dependent on memory type)
32 GB 64 GB
Memory Types
Memory Types
DDR3-1333/1600, DDR3L-1333/1600 @ 1.5V DDR4-1866/2133, DDR3L-1333/1600 @ 1.35V
Memory Bandwidth
Max Memory Bandwidth
25.6 GB/s 34.1 GB/s
Processor Graphics
Processor Graphics ‡
Intel® HD Graphics 4600 Intel® HD Graphics 530
Graphics Output
Graphics Output
eDP/DP/HDMI/DVI/VGA eDP/DP/HDMI/DVI
Graphics Max Dynamic Frequency
Graphics Max Dynamic Frequency
1.25 GHz 1.15 GHz
Graphics Video Max Memory
Graphics Video Max Memory
2 GB 64 GB
Graphics and IMC Lithography
Graphics and IMC Lithography
22 nm 14 nm
TSX-NI
Intel® TSX-NI
No Yes

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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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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) October 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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