IntelBX80662I76700K
IntelBX80646I74790K
$348

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

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About
 $348 

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

Real World Speed
Performance profile from 547,667 user samples
312,153 User Benchmarks
Best Bench: 91% Base clock 4 GHz, turbo 4.7 GHz (avg)
Worst Bench: 62% Base clock 4 GHz, turbo 0.8 GHz (avg)
Poor: 62% Great: 91%
SPEED RANK: 58th / 1182
Gaming
Gaming 76%
Battleship
Desktop
Desktop 84%
Aircraft carrier
Workstation
Workstation 57%
Gunboat
235,514 User Benchmarks
Best Bench: 89% Base clock 4 GHz, turbo 4.9 GHz (avg)
Worst Bench: 58% Base clock 4 GHz, turbo 0.75 GHz (avg)
Poor: 58% Great: 89%
SPEED RANK: 62nd / 1182
Gaming
Gaming 76%
Battleship
Desktop
Desktop 83%
Aircraft carrier
Workstation
Workstation 56%
Gunboat
Effective Speed
Effective CPU Speed
76.4 % +1% 75.7 %
1-Core
Avg. Single Core Mixed Speed
125 Pts +2% 123 Pts
2-Core
Avg. Dual Core Mixed Speed
242 Pts +1% 239 Pts
4-Core
Avg. Quad Core Mixed Speed
429 Pts +0% 427 Pts
8-Core
Avg. Octa Core Mixed Speed
640 Pts +2% 628 Pts
64-Core
Avg. Multi Core Mixed Speed
649 Pts +2% 636 Pts
1-Core
OC Single Core Mixed Speed
142 Pts +3% 138 Pts
2-Core
OC Dual Core Mixed Speed
278 Pts +2% 272 Pts
4-Core
OC Quad Core Mixed Speed
517 Pts 517 Pts
8-Core
OC Octa Core Mixed Speed
746 Pts +4% 719 Pts
64-Core
OC Multi Core Mixed Speed
749 Pts +3% 726 Pts
Market Share
Based on 19,520,808 CPUs tested.
Market Share
Market Share (trailing 30 days)
1.47 % Much higher market share.
+30%
1.13 %
Value
Value For Money
77.1 % Slightly better value.
+8%
71.2 %
User Rating
UBM User Rating
79 % 88 % Slightly more popular.
+11%
Price
Price (score)
$269 Cheaper.
+23%
$348
Age
Newest
48 Months More recent.
+23%
62 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%
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

More specs » More specs »
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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]

MORE DETAILS

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]

MORE DETAILS

Processor Rankings (Price vs Performance) August 2019 CPU Rankings.

We calculate effective speed which measures real world performance for typical gamers and desktop users. 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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  • - CPU tests include: integer, floating and string.
  • - GPU tests include: six 3D game simulations.
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  • - 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.
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