IntelBX80677I77700K
IntelBX80646I74790K
$348

4 Cores, 8 Threads @4.2GHz, Kaby Lake.
Release date: Q1 2017.

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About
 $348 

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

Real World Speed
Performance profile from 536,659 user samples
301,145 User Benchmarks
Best Bench: 96% Base clock 4.2 GHz, turbo 5 GHz (avg)
Worst Bench: 67% Base clock 4.2 GHz, turbo 0.8 GHz (avg)
Poor: 67% Great: 96%
SPEED RANK: 39th / 1182
Gaming
Gaming 83%
Aircraft carrier
Desktop
Desktop 91%
Nuclear submarine
Workstation
Workstation 62%
Destroyer
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: 63rd / 1182
Gaming
Gaming 76%
Battleship
Desktop
Desktop 83%
Aircraft carrier
Workstation
Workstation 56%
Gunboat
Effective Speed
Effective CPU Speed
83.3 % Slightly faster effective speed.
+10%
75.7 %
1-Core
Avg. Single Core Mixed Speed
136 Pts Slightly faster single-core speed.
+11%
123 Pts
2-Core
Avg. Dual Core Mixed Speed
264 Pts Slightly faster dual-core speed.
+10%
239 Pts
4-Core
Avg. Quad Core Mixed Speed
468 Pts Slightly faster quad-core speed.
+10%
427 Pts
8-Core
Avg. Octa Core Mixed Speed
695 Pts Slightly faster octa-core speed.
+11%
628 Pts
64-Core
Avg. Multi Core Mixed Speed
704 Pts Slightly faster 64-core speed.
+11%
636 Pts
1-Core
OC Single Core Mixed Speed
150 Pts Slightly faster OC single-core speed.
+9%
138 Pts
2-Core
OC Dual Core Mixed Speed
297 Pts Slightly faster OC dual-core speed.
+9%
272 Pts
4-Core
OC Quad Core Mixed Speed
554 Pts Slightly faster OC quad-core speed.
+7%
517 Pts
8-Core
OC Octa Core Mixed Speed
787 Pts Slightly faster OC octa-core speed.
+9%
719 Pts
64-Core
OC Multi Core Mixed Speed
790 Pts Slightly faster OC 64-core speed.
+9%
726 Pts
Market Share
Based on 19,452,676 CPUs tested.
Market Share
Market Share (trailing 30 days)
1.46 % Higher market share.
+29%
1.13 %
Value
Value For Money
80.9 % Slightly better value.
+14%
71.2 %
User Rating
UBM User Rating
106 % More popular.
+15%
92 %
Price
Price (score)
$310 Slightly cheaper.
+11%
$348
Age
Newest
31 Months Much more recent.
+50%
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
4.2 GHz +5% 4 GHz
Turbo Clock
Turbo Clock Speed
4.5 GHz +2% 4.4 GHz
Series
CPU Architecture
Kaby Lake Haswell
Socket
Motherboard Socket
FCLGA1151 FCLGA1150
Graphics
Integrated Graphics
HD 630 HD 4600
Launch Date
Launch Date
Q1'17 Q2'14
Cache
Cache
8 MB 8 MB SmartCache
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
DDR4-2133/2400, DDR3L-1333/1600 @ 1.35V DDR3-1333/1600, DDR3L-1333/1600 @ 1.5V
Processor Graphics
Processor Graphics ‡
Intel® HD Graphics 630 Intel® HD Graphics 4600
Graphics Base Frequency
Graphics Base Frequency
350.00 MHz 350 MHz
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
TSX-NI
Intel® TSX-NI
Yes No

More specs » More specs »
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The Core i7-7700K is Intel’s flagship Kaby Lake based CPU which is reported to have the same IPC as its predecessor, Skylake. Comparing the 7700K and 6700K shows that both average effective speed and peak overclocked speed are up by 7%. Most of the increase in average effective speed is explained by the 5% boost in base clocks from 4.0 to 4.2 GHz. The improved peak lab speed is attributable to a combination of better overclocking capacity and improvements in Intel’s speedshift technology which make the 7700K slightly more responsive. Kaby Lake also has marginally better HD 630 integrated graphics. The i7-7700K is priced similarly to the i7-6700K so for top end gaming and workstation builds, the 7700K is the clear choice for 2017. AMD’s Ryzen will release later this year so things could change at that time. [Jan '17 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.
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.
  • - CPU tests include: integer, floating and string.
  • - GPU tests include: six 3D game simulations.
  • - Drive tests include: read, write, sustained write and mixed IO.
  • - 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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