IntelBX80662I36300
IntelBX80646I74790K
$348

2 Cores, 4 Threads @3.8GHz, Skylake.
Release date: Q4 2015.

 $348 

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

Real World Speed
Performance profile from 459,418 user samples
3,672 User Benchmarks
Best Bench: 75% Base clock 3.8 GHz, turbo 3.8 GHz (avg)
Worst Bench: 52% Base clock 3.8 GHz, turbo 0.8 GHz (avg)
Poor: 52% Great: 75%
SPEED RANK: 467th / 1442
Gaming
Gaming 67%
Battle cruiser
Desktop
Desktop 75%
Battleship
Workstation
Workstation 49%
Yacht
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
Effective Speed
Effective CPU Speed
66.7 % 78.9 % Faster effective speed.
+18%
Memory
Avg. Memory Latency
83.3 Pts 88.1 Pts Slightly lower memory latency.
+6%
1-Core
Avg. Single Core Speed
107 Pts 114 Pts Slightly faster single-core speed.
+7%
2-Core
Avg. Dual Core Speed
189 Pts 216 Pts Faster dual-core speed.
+14%
4-Core
Avg. Quad Core Speed
290 Pts 378 Pts Much faster quad-core speed.
+30%
8-Core
Avg. Octa Core Speed
297 Pts 560 Pts Hugely faster octa-core speed.
+89%
Memory
OC Memory Latency
93.8 Pts 96.8 Pts +3%
1-Core
OC Single Core Speed
121 Pts 128 Pts Slightly faster OC single-core speed.
+6%
2-Core
OC Dual Core Speed
223 Pts 248 Pts Faster OC dual-core speed.
+11%
4-Core
OC Quad Core Speed
335 Pts 433 Pts Faster OC quad-core speed.
+29%
8-Core
OC Octa Core Speed
334 Pts 643 Pts Hugely faster OC octa-core speed.
+93%
Market Share
Based on 67,694,137 CPUs tested
Market Share
Market Share (trailing 30 days)
0 % 0.68 % Insanely higher market share.
+∞%
Value
Value For Money
110 % Much better value.
+49%
74.2 %
User Rating
UBM User Rating
52 % 88 % Much more popular.
+69%
Price
Price (score)
$44 Hugely cheaper.
+87%
$348
Age
Newest
102 Months More recent.
+14%
118 Months
TDP
Thermal Design Power (TDP)
47 Watts Much more energy efficient.
+47%
88 Watts
Cores
CPU Processing Cores
2 cores 4 cores Hugely higher core count.
+100%
Threads
CPU Processing Threads
4 threads 8 threads Hugely higher thread count.
+100%
Lithography
Manufacturing process
14 nm Much newer manufacturing.
+36%
22 nm
Base Clock
Base Clock Speed
3.8 GHz 4 GHz Slightly faster base frequency.
+5%
Turbo Clock
Turbo Clock Speed
3.8 GHz 4.4 GHz Faster turbo frequency.
+16%
64-Core
OC Multi Core Speed
335 Pts 654 Pts Hugely faster OC 64-core speed.
+95%
64-Core
Avg. Multi Core Speed
299 Pts 573 Pts Hugely faster 64-core speed.
+92%
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
Cache
Cache
4 MB SmartCache 8 MB SmartCache
Lithography
Lithography
14 nm 22 nm
Recommended Price
Recommended Customer Price
$138.00 - $147.00 $339.00 - $350.00
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
ECC Memory Supported
ECC Memory Supported ‡
Yes No
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
Turbo Boost Tech
Intel® Turbo Boost Technology ‡
No 2.0

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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