IntelBX80662I76700
IntelBX80646I74790K
$348

4 Cores, 8 Threads @3.4GHz, Skylake.
Release date: Q3 2015.

 $348 

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

Real World Speed
Performance profile from 499,714 user samples
184,335 User Benchmarks
Best Bench: 85% Base clock 3.4 GHz, turbo 3.35 GHz (avg)
Worst Bench: 65% Base clock 3.4 GHz, turbo 3.4 GHz (avg)
Poor: 65% Great: 85%
SPEED RANK: 189th / 1272
Gaming
Gaming 76%
Battleship
Desktop
Desktop 79%
Battleship
Workstation
Workstation 63%
Destroyer
315,379 User Benchmarks
Best Bench: 94% Base clock 4 GHz, turbo 4.85 GHz (avg)
Worst Bench: 70% Base clock 4 GHz, turbo 0.8 GHz (avg)
Poor: 70% Great: 94%
SPEED RANK: 89th / 1272
Gaming
Gaming 84%
Aircraft carrier
Desktop
Desktop 88%
Aircraft carrier
Workstation
Workstation 69%
Battle cruiser
Effective Speed
Effective CPU Speed
76.1 % 84 % Faster effective speed.
+10%
Memory
Avg. Memory Latency
84.2 Pts 90.8 Pts Slightly lower memory latency.
+8%
1-Core
Avg. Single Core Mixed Speed
107 Pts 123 Pts Faster single-core speed.
+15%
2-Core
Avg. Dual Core Mixed Speed
205 Pts 236 Pts Faster dual-core speed.
+15%
4-Core
Avg. Quad Core Mixed Speed
368 Pts 418 Pts Faster quad-core speed.
+14%
8-Core
Avg. Octa Core Mixed Speed
552 Pts 623 Pts Faster octa-core speed.
+13%
Memory
OC Memory Latency
93.1 Pts 97.3 Pts +5%
1-Core
OC Single Core Mixed Speed
121 Pts 137 Pts Faster OC single-core speed.
+13%
2-Core
OC Dual Core Mixed Speed
236 Pts 271 Pts Faster OC dual-core speed.
+15%
4-Core
OC Quad Core Mixed Speed
437 Pts 503 Pts Faster OC quad-core speed.
+15%
8-Core
OC Octa Core Mixed Speed
617 Pts 713 Pts Faster OC octa-core speed.
+16%
Market Share
Based on 34,472,745 CPUs tested.
Market Share
Market Share (trailing 30 days)
0.68 % 0.92 % Much higher market share.
+35%
Value
Value For Money
76 % 79 % +4%
User Rating
UBM User Rating
86 % 160 % Hugely more popular.
+86%
Price
Price (score)
$279 Cheaper.
+20%
$348
Age
Newest
61 Months More recent.
+20%
76 Months
TDP
Thermal Design Power (TDP)
65 Watts More energy efficient.
+26%
88 Watts
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
3.4 GHz 4 GHz Faster base frequency.
+18%
Turbo Clock
Turbo Clock Speed
4 GHz 4.4 GHz Faster turbo frequency.
+10%
64-Core
OC Multi Core Mixed Speed
620 Pts 716 Pts Faster OC 64-core speed.
+15%
64-Core
Avg. Multi Core Mixed Speed
561 Pts 630 Pts Faster 64-core speed.
+12%
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
Embedded Options Available
Embedded Options Available
Yes No
Lithography
Lithography
14 nm 22 nm
Recommended Price
Recommended Customer Price
$303.00 - $312.00 $339.00 - $350.00
Max Turbo Frequency
Max Turbo Frequency
4 GHz 4.4 GHz
Bus Speed
Bus Speed
8 GT/s DMI3 5 GT/s DMI2
Thermal Solution Specification
Thermal Solution Specification
PCG 2015C (65W) 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
vPro Tech
Intel® vPro™ Technology ‡
Yes No
Stable Image Platform Program (SIPP)
Intel® Stable Image Platform Program (SIPP)
Yes No
Trusted Execution Tech
Intel® Trusted Execution Technology ‡
Yes No

More specs » More specs »
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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) October 2020 CPU Rankings.

We calculate effective speed which measures real world performance for typical users. Effective speed is adjusted by current prices to yield a value for money rating. 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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How it works

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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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