IntelBX80677I77700K
IntelBX80646I74790

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

4 Cores, 8 Threads @3.6GHz, Haswell.
Release date: Q2 2014.

Real World Speed
Performance profile from 349,650 user samples
259,121 User Benchmarks
Best Bench: 113% Base clock 4.2 GHz, turbo 5.25 GHz (avg)
Worst Bench: 81% Base clock 4.2 GHz, turbo 0.8 GHz (avg)
Poor: 81% Great: 113%
SPEED RANK: 31st / 1147
Gaming
Gaming 96%
Nuclear submarine
Desktop
Desktop 97%
Nuclear submarine
Workstation
Workstation 71%
Battleship
90,529 User Benchmarks
Best Bench: 86% Base clock 3.6 GHz, turbo 4 GHz (avg)
Worst Bench: 63% Base clock 3.6 GHz
Poor: 63% Great: 86%
SPEED RANK: 100th / 1147
Gaming
Gaming 76%
Battleship
Desktop
Desktop 77%
Battleship
Workstation
Workstation 56%
Gunboat
Effective Speed
Effective CPU Speed
96.3 % Faster effective speed.
+27%
75.8 %
SC Mixed
Avg. Single Core Mixed Speed
136 Pts Faster single-core speed.
+27%
107 Pts
QC Mixed
Avg. Quad Core Mixed Speed
471 Pts Faster quad-core speed.
+27%
370 Pts
MC Mixed
Avg. Multi Core Mixed Speed
715 Pts Faster multi-core speed.
+27%
563 Pts
SC Mixed
OC Single Core Mixed Speed
154 Pts Much faster OC single-core speed.
+32%
117 Pts
QC Mixed
OC Quad Core Mixed Speed
568 Pts Much faster OC quad-core speed.
+31%
434 Pts
MC Mixed
OC Multi Core Mixed Speed
816 Pts Much faster OC multi-core speed.
+37%
597 Pts
Market Share
Based on 15,639,428 CPUs tested.
Market Share
Market Share (trailing 30 days)
1.69 % Hugely higher market share.
+86%
0.91 %
Value
Value For Money
90.1 % Better value.
+20%
75 %
User Rating
UBM User Rating
129 % Hugely more popular.
+82%
71 %
Price
Price (score)
$349 $300 Slightly cheaper.
+14%
Age
Newest
26 Months Much more recent.
+55%
58 Months
TDP
Thermal Design Power (TDP)
91 Watts 84 Watts Slightly more energy efficient.
+8%
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 Faster base frequency.
+17%
3.6 GHz
Turbo Clock
Turbo Clock Speed
4.5 GHz Slightly faster turbo frequency.
+12%
4 GHz
SC Int
Single Core Integer Speed
149 Pts Faster single-core int speed.
+27%
117 Pts
SC Float
Single Core Floating Point Speed
158 Pts Much faster single-core fp speed.
+33%
119 Pts
QC Int
Quad Core Integer Speed
550 Pts Faster quad-core int speed.
+24%
442 Pts
QC Float
Quad Core Floating Point Speed
586 Pts Much faster quad-core fp speed.
+34%
438 Pts
MC Int
Multi Core Integer Speed
738 Pts Faster multi-core int speed.
+30%
568 Pts
MC Float
Multi Core Floating Point Speed
867 Pts Much faster multi-core fp speed.
+43%
605 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
Recommended Price
Recommended Customer Price
$339.00 - $350.00 $303.00 - $312.00
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 1.2 GHz
Graphics Video Max Memory
Graphics Video Max Memory
64 GB 2 GB
TSX-NI
Intel® TSX-NI
Yes No
vPro Tech
Intel® vPro™ Technology ‡
No Yes
Stable Image Platform Program (SIPP)
Intel® Stable Image Platform Program (SIPP)
No Yes
PCI Express Revision
PCI Express Revision
3.0 Up to 3.0

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 Core i7-4790 is the third upgrade to Intel's flagship quad core hyper-threaded CPU. This version, like its predecessor the i7-4771, gets a 100 MHz bump in stock frequency and additionally the i7-4790 also gets a 100 MHz turbo frequency bump. These improvements (~4%) are marginal and practically impossible to discern in day to day use. Looking at a benchmark comparison between the 4771 and 4790 verifies that there is little difference between the two CPUs. Although the i7-4790 isn't much of a step forward, it's still one of the best (locked) mainstream processors on the market. AMD hasn't been able to compete with Intel on single threaded performance for several years, consequently Intel have no need to push the envelope. Overclockers should wait for the 4790K which is rumoured to be released shortly. [May '14 CPUPro]

MORE DETAILS

Processor Rankings (Price vs Performance) March 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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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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  • - Reports are generated and presented on userbenchmark.com.
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