IntelBX80646I74790K
$348
IntelBX80662I36100
 $348 

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

2 Cores, 4 Threads @3.7GHz, Skylake.
Release date: Q4 2015.

Real World Speed
Performance profile from 565,912 user samples
455,746 User Benchmarks
Best Bench: 87% Base clock 4 GHz, turbo 4.6 GHz (avg)
Worst Bench: 67% Base clock 4 GHz, turbo 0.7 GHz (avg)
Poor: 67% Great: 87%
SPEED RANK: 251st / 1442
Gaming
Gaming 79%
Battleship
Desktop
Desktop 83%
Aircraft carrier
Workstation
Workstation 65%
Destroyer
110,166 User Benchmarks
Best Bench: 68% Base clock 3.7 GHz, turbo 3.7 GHz (avg)
Worst Bench: 29% Base clock 3.7 GHz, turbo 3.7 GHz (avg)
Poor: 29% Great: 68%
SPEED RANK: 673rd / 1442
Gaming
Gaming 55%
Gunboat
Desktop
Desktop 64%
Destroyer
Workstation
Workstation 41%
Speed boat
Effective Speed
Effective CPU Speed
78.9 % Much faster effective speed.
+43%
55.4 %
Memory
Avg. Memory Latency
88.1 Pts Lower memory latency.
+23%
71.8 Pts
1-Core
Avg. Single Core Speed
114 Pts Faster single-core speed.
+27%
89.5 Pts
2-Core
Avg. Dual Core Speed
216 Pts Much faster dual-core speed.
+36%
159 Pts
4-Core
Avg. Quad Core Speed
378 Pts Much faster quad-core speed.
+68%
225 Pts
8-Core
Avg. Octa Core Speed
560 Pts Hugely faster octa-core speed.
+136%
237 Pts
Memory
OC Memory Latency
96.8 Pts Slightly lower OC memory latency.
+6%
91.3 Pts
1-Core
OC Single Core Speed
128 Pts Faster OC single-core speed.
+20%
107 Pts
2-Core
OC Dual Core Speed
248 Pts Much faster OC dual-core speed.
+31%
189 Pts
4-Core
OC Quad Core Speed
433 Pts Much faster OC quad-core speed.
+58%
274 Pts
8-Core
OC Octa Core Speed
643 Pts Hugely faster OC octa-core speed.
+129%
281 Pts
Market Share
Based on 67,695,335 CPUs tested
Market Share
Market Share (trailing 30 days)
0.68 % Hugely higher market share.
+240%
0.2 %
Value
Value For Money
74.2 % 79 % Slightly better value.
+6%
User Rating
UBM User Rating
88 % Much more popular.
+44%
61 %
Price
Price (score)
$348 $76 Much cheaper.
+78%
Age
Newest
118 Months 102 Months More recent.
+14%
TDP
Thermal Design Power (TDP)
88 Watts 47 Watts Much more energy efficient.
+47%
Cores
CPU Processing Cores
4 cores Hugely higher core count.
+100%
2 cores
Threads
CPU Processing Threads
8 threads Hugely higher thread count.
+100%
4 threads
Lithography
Manufacturing process
22 nm 14 nm Much newer manufacturing.
+36%
Base Clock
Base Clock Speed
4 GHz Slightly faster base frequency.
+8%
3.7 GHz
Turbo Clock
Turbo Clock Speed
4.4 GHz Faster turbo frequency.
+19%
3.7 GHz
64-Core
OC Multi Core Speed
654 Pts Hugely faster OC 64-core speed.
+129%
285 Pts
64-Core
Avg. Multi Core Speed
573 Pts Hugely faster 64-core speed.
+139%
240 Pts
Series
CPU Architecture
Haswell Skylake
Socket
Motherboard Socket
FCLGA1150 FCLGA1151
Graphics
Integrated Graphics
HD 4600 HD 530
Launch Date
Launch Date
Q2'14 Q3'15
Cache
Cache
8 MB SmartCache 3 MB SmartCache
Embedded Options Available
Embedded Options Available
No Yes
Lithography
Lithography
22 nm 14 nm
Recommended Price
Recommended Customer Price
$339.00 - $350.00 $117.00
Bus Speed
Bus Speed
5 GT/s DMI2 8 GT/s DMI3
Thermal Solution Specification
Thermal Solution Specification
PCG 2013D PCG 2015C (65W)
Max Memory Size
Max Memory Size (dependent on memory type)
32 GB 64 GB
Memory Types
Memory Types
DDR3-1333/1600, DDR3L-1333/1600 @ 1.5V DDR4-1866/2133, DDR3L-1333/1600 @ 1.35V
Memory Bandwidth
Max Memory Bandwidth
25.6 GB/s 34.1 GB/s
ECC Memory Supported
ECC Memory Supported ‡
No Yes
Processor Graphics
Processor Graphics ‡
Intel® HD Graphics 4600 Intel® HD Graphics 530
Graphics Output
Graphics Output
eDP/DP/HDMI/DVI/VGA eDP/DP/HDMI/DVI
Graphics Max Dynamic Frequency
Graphics Max Dynamic Frequency
1.25 GHz 1.05 GHz
Graphics Video Max Memory
Graphics Video Max Memory
2 GB 64 GB
Graphics and IMC Lithography
Graphics and IMC Lithography
22 nm 14 nm
Turbo Boost Tech
Intel® Turbo Boost Technology ‡
2.0 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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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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