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Intel Core i7 4790K

Front view of Intel Core i7 4790K
Front view of Intel Core i7 3960X

Intel Core i7 3960X

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Differences What are the advantages of each

Front view of Intel Core i7 4790K

Reasons to consider the
Intel Core i7 4790K

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Has a built-in GPU Yes vs No Somewhat common; A separate graphics adapter is not required
Front view of Intel Core i7 3960X

Reasons to consider the
Intel Core i7 3960X

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CPUBoss is not aware of any important advantages of the 3960X Extreme Edition vs the 4790K.

Benchmarks Real world tests of Core i7 4790K vs 3960X

CompuBench 1.5 (Ocean surface simulation) Data courtesy CompuBench

Core i7 4790K
233.07 fps
Core i7 3960X
63.21 fps

GeekBench 3 (Multi-core) Data courtesy Primate Labs

Core i7 4790K
15,490
Core i7 3960X
18,528

GeekBench 3 (Single core) Data courtesy Primate Labs

Core i7 4790K
4,004
Core i7 3960X
3,267

GeekBench 3 (AES single core) Data courtesy Primate Labs

Core i7 4790K
5,140,000 MB/s
Core i7 3960X
2,595,000 MB/s

GeekBench (32-bit) Data courtesy Primate Labs

Core i7 4790K
15,465
Core i7 3960X
19,457

GeekBench (64-bit) Data courtesy Primate Labs

Core i7 4790K
16,653
Core i7 3960X
20,406

PassMark Data courtesy Passmark

Core i7 4790K
11,194
Core i7 3960X
12,802

PassMark (Single Core)

Core i7 4790K
2,530
Core i7 3960X
2,015

Reviews Word on the street

Core i7 4790K  vs 3960X 
8.0
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8.0
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Specifications Full list of technical specs

summary

 Core i7 4790K  vs
3960X 
Clock speed 4 GHz 3.3 GHz
Turbo clock speed 4.4 GHz 3.9 GHz
Cores Quad core Hexa core
Is unlocked Yes Yes

features
Has a NX bit Yes Yes
Supports trusted computing No No
Has virtualization support Yes Yes
Instruction set extensions
SSE2
F16C
MMX
SSE4
AVX
SSE3
EM64T
SSE
SSE4.1
FMA3
SSE4.2
Supplemental SSE3
AES
AVX 2.0
Supports dynamic frequency scaling Yes Yes

power consumption
TDP 88W 130W
Annual home energy cost 21.2 $/year 56.39 $/year
Annual commercial energy cost 77.09 $/year 184.84 $/year
Performance per watt 11.42 pt/W 5.04 pt/W
Typical power consumption 71.5W 176.72W

bus
Architecture DMI 2.0 DMI 2.0
Number of links 0 1
Transfer rate 5,000 MT/s 5,000 MT/s

details

 Core i7 4790K  vs
3960X 
Architecture x86-64 x86-64
Threads 8 12
L2 cache 1 MB 2 MB
L2 cache per core 0.25 MB/core 0.33 MB/core
L3 cache 8 MB 15 MB
L3 cache per core 2 MB/core 2.5 MB/core
Manufacture process 22 nm 32 nm
Max CPUs 1 1
Operating temperature Unknown - 74.04°C Unknown - 66.8°C

overclocking
Overclocked clock speed 4.63 GHz 4.76 GHz
Overclocked clock speed (Water) 4.8 GHz 4.58 GHz
PassMark (Overclocked) 6,925.3 7,065.9
Overclocked clock speed (Air) 4.63 GHz 4.76 GHz

integrated graphics
GPU GPU None
Label Intel® HD Graphics 4600 N/A
Number of displays supported 3 N/A
GPU clock speed 350 MHz N/A
Turbo clock speed 1,250 MHz N/A

memory controller
Memory controller Built-in Built-in
Memory type
DDR3-1600
DDR3L-1600
DDR3-1333
DDR3-1066
DDR3
Channels Dual Channel Quad Channel
Supports ECC No No
Maximum bandwidth 25,600 MB/s 51,200 MB/s
Maximum memory size 32,768 MB 65,536 MB
Intel Core i7 4790K
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Intel Core i7 3960X
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