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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 3930K

Reasons to consider the
Intel Core i7 3930K

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CPUBoss is not aware of any important advantages of the 3930K vs the 4790K.

Benchmarks Real world tests of Core i7 4790K vs 3930K

GeekBench 3 (Multi-core) Data courtesy Primate Labs

GeekBench 3 (Single core) Data courtesy Primate Labs

GeekBench 3 (AES single core) Data courtesy Primate Labs

Core i7 4790K
5,140,000 MB/s
Core i7 3930K
2,430,000 MB/s

GeekBench (32-bit) Data courtesy Primate Labs

GeekBench (64-bit) Data courtesy Primate Labs

GeekBench

PassMark Data courtesy Passmark

PassMark (Single Core)

Reviews Word on the street

Specifications Full list of technical specs

summary

Core i7 4790K  vs
3930K 
Clock speed 4 GHz 3.2 GHz
Turbo clock speed 4.4 GHz 3.8 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 56.96 $/year
Annual commercial energy cost 77.09 $/year 177.83 $/year
Performance per watt 11.42 pt/W 5.5 pt/W
Typical power consumption 71.5W 172.6W

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
3930K 
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 12 MB
L3 cache per core 2 MB/core 2 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 4.67 GHz
Overclocked clock speed (Water) 4.8 GHz 4.67 GHz
PassMark (Overclocked) 6,925.3 6,119.5
Overclocked clock speed (Air) 4.63 GHz 4.67 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 65,771.52 MB
Intel Core i7 4790K
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Intel Core i7 3930K
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