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Intel Core i5 6600K

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Front view of Intel Core i5 6600K

Differences What are the advantages of each

Front view of Intel Core i5 6600K

Reasons to consider the
Intel Core i5 6600K

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Is unlocked Yes vs No Somewhat common; An unlocked multiplier allows for easier overclocking
Significantly higher clock speed 3.5 GHz vs 2.7 GHz Around 30% higher clock speed
Higher turbo clock speed 3.9 GHz vs 3.3 GHz Around 20% higher turbo clock speed
More l2 cache 1 MB vs 0.5 MB 2x more l2 cache; more data can be stored in the l2 cache for quick access later
Much better PassMark (Single core) score 2,148 vs 476 More than 4.5x better PassMark (Single core) score
Significantly newer manufacturing process 14 nm vs 22 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Significantly better PassMark score 8,012 vs 1,271 More than 6.2x better PassMark score
Much better overclocked clock speed (Air) 4.54 GHz vs 2.7 GHz Around 70% better overclocked clock speed (Air)
Significantly better turbo clock speed 1,150 MHz vs 1,000 MHz 15% better turbo clock speed
More l3 cache 6 MB vs 3 MB 2x more l3 cache; more data can be stored in the l3 cache for quick access later
Much better performance per dollar 0.89 pt/$ vs 0.36 pt/$ Around 2.5x better performance per dollar
More cores 4 vs 2 Twice as many cores; run more applications at once
Better CompuBench 1.5 video composition score 14.26 fps vs 8.96 fps Around 60% better CompuBench 1.5 video composition score
Newer Jul, 2015 vs Jul, 2013 Release date over 2 years later
Much better overclocked clock speed (Water) 4.57 GHz vs 2.7 GHz Around 70% better overclocked clock speed (Water)
Front view of Intel Core i5 4400E

Reasons to consider the
Intel Core i5 4400E

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Much lower typical power consumption 30.06W vs 73.94W 2.5x lower typical power consumption
Supports trusted computing Yes vs No Somewhat common; Allows for safer, more reliable computing
Higher GPU clock speed 400 MHz vs 350 MHz Around 15% higher GPU clock speed
Much lower annual home energy cost 8.91 $/year vs 21.92 $/year 2.5x lower annual home energy cost
Much lower annual commercial energy cost 32.41 $/year vs 79.72 $/year 2.5x lower annual commercial energy cost

Benchmarks Real world tests of Core i5 6600K vs 4400E

CompuBench 1.5 (Bitcoin mining) Data courtesy CompuBench

Core i5 6600K
35.25 mHash/s
Core i5 4400E
12.65 mHash/s

CompuBench 1.5 (Face detection)

Core i5 6600K
28.75 mPixels/s
Core i5 4400E
12.13 mPixels/s

CompuBench 1.5 (Ocean surface simulation) Data courtesy CompuBench

Core i5 6600K
173.8 fps
Core i5 4400E
77.02 fps

CompuBench 1.5 (T-Rex) Data courtesy CompuBench

Core i5 6600K
1.91 fps
Core i5 4400E
0.85 fps

CompuBench 1.5 (Video composition) Data courtesy CompuBench

Core i5 6600K
14.26 fps
Core i5 4400E
8.96 fps

PassMark Data courtesy Passmark

PassMark (Single Core)

Specifications Full list of technical specs

summary

Core i5 6600K  vs
4400E 
Clock speed 3.5 GHz 2.7 GHz
Turbo clock speed 3.9 GHz 3.3 GHz
Cores Quad core Dual core
Is unlocked Yes No

features

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

power consumption

TDP 91W 37W
Annual home energy cost 21.92 $/year 8.91 $/year
Annual commercial energy cost 79.72 $/year 32.41 $/year
Performance per watt 2.45 pt/W 2.61 pt/W
Typical power consumption 73.94W 30.06W

bus

Architecture FSB DMI 2.0
Number of links 0 1
Transfer rate 8,000 MT/s 5,000 MT/s

details

Core i5 6600K  vs
4400E 
Architecture x86-64 x86-64
Threads 4 4
L2 cache 1 MB 0.5 MB
L2 cache per core 0.25 MB/core 0.25 MB/core
L3 cache 6 MB 3 MB
L3 cache per core 1.5 MB/core 1.5 MB/core
Manufacture process 14 nm 22 nm
Max CPUs 1 1

overclocking

Overclocked clock speed 4.54 GHz 2.7 GHz
Overclocked clock speed (Water) 4.57 GHz 2.7 GHz
Overclocked clock speed (Air) 4.54 GHz 2.7 GHz

integrated graphics

GPU GPU GPU
Label Intel® HD Graphics 530 HD 4600
Number of displays supported 3 3
GPU clock speed 350 MHz 400 MHz
Turbo clock speed 1,150 MHz 1,000 MHz

memory controller

Memory controller Built-in Built-in
Memory type
DDR3L-1600
DDR3-1600
DDR3-1333
Channels Dual Channel Dual Channel
Supports ECC No No
Maximum bandwidth 25,600 MB/s 25,600 MB/s
Maximum memory size 65,536 MB 16,384 MB
Intel Core i5 6600K
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Intel Core i5 4400E
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