IntelBX80677I77700K
IntelBX80646I74790K

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

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

Real World Speed
Performance profile from 402,913 user samples
231,023 User Benchmarks
Best Bench: 110% Base clock 5.2 GHz
Worst Bench: 82% Base clock 4.2 GHz, turbo 1.2 GHz (avg)
Poor: 82% Great: 110%
SPEED RANK: 27th / 1137
Gaming
Gaming 96%
Nuclear submarine
Desktop
Desktop 97%
Nuclear submarine
Workstation
Workstation 71%
Battleship
171,890 User Benchmarks
Best Bench: 99% Base clock 4 GHz, turbo 4.8 GHz (avg)
Worst Bench: 72% Base clock 4 GHz, turbo 0.7 GHz (avg)
Poor: 72% Great: 99%
SPEED RANK: 47th / 1137
Gaming
Gaming 85%
Aircraft carrier
Desktop
Desktop 87%
Aircraft carrier
Workstation
Workstation 63%
Destroyer
Effective Speed
Effective CPU Speed
95.7 % Slightly faster effective speed.
+12%
85.4 %
SC Mixed
Avg. Single Core Mixed Speed
136 Pts Slightly faster single-core speed.
+11%
122 Pts
QC Mixed
Avg. Quad Core Mixed Speed
466 Pts Slightly faster quad-core speed.
+12%
416 Pts
MC Mixed
Avg. Multi Core Mixed Speed
722 Pts Slightly faster multi-core speed.
+15%
630 Pts
SC Mixed
OC Single Core Mixed Speed
152 Pts Slightly faster OC single-core speed.
+12%
136 Pts
QC Mixed
OC Quad Core Mixed Speed
554 Pts Slightly faster OC quad-core speed.
+9%
507 Pts
MC Mixed
OC Multi Core Mixed Speed
811 Pts Slightly faster OC multi-core speed.
+13%
718 Pts
Market Share
Based on 12,237,565 CPUs tested.
Market Share
Market Share (trailing 30 days)
2.06 % Higher market share.
+29%
1.6 %
Value
Value For Money
89.4 % Slightly better value.
+9%
82.1 %
User Rating
UBM User Rating
131 % Much more popular.
+38%
95 %
Price
Price (score)
$350 $324 Slightly cheaper.
+7%
Age
Newest
22 Months Much more recent.
+58%
53 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
SC Int
Single Core Integer Speed
148 Pts Slightly faster single-core int speed.
+8%
137 Pts
SC Float
Single Core Floating Point Speed
157 Pts Slightly faster single-core fp speed.
+15%
137 Pts
QC Int
Quad Core Integer Speed
540 Pts Slightly faster quad-core int speed.
+7%
506 Pts
QC Float
Quad Core Floating Point Speed
585 Pts Slightly faster quad-core fp speed.
+14%
511 Pts
MC Int
Multi Core Integer Speed
744 Pts Slightly faster multi-core int speed.
+9%
682 Pts
MC Float
Multi Core Floating Point Speed
862 Pts Faster multi-core fp speed.
+18%
730 Pts
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]

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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) November 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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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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  • - CPU tests include: integer, floating and string.
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  • - RAM tests include: single/multi core bandwidth and latency.
  • - Reports are generated and presented on userbenchmark.com.
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