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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
Much newer manufacturing process 14 nm vs 32 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
More l3 cache 6 MB vs None Compared to all cpus, 6 MB l3 cache is just OK
Significantly better PassMark score 8,012 vs 2,612 More than 3x better PassMark score
Better PassMark (Single core) score 2,148 vs 1,580 More than 35% better PassMark (Single core) score
More cores 4 vs 2 Twice as many cores; run more applications at once
Better overclocked clock speed (Air) 4.54 GHz vs 4 GHz Around 15% better overclocked clock speed (Air)
More threads 4 vs 2 Twice as many threads
Better overclocked clock speed (Water) 4.57 GHz vs 4 GHz Around 15% better overclocked clock speed (Water)
Front view of AMD A6 6420B

Reasons to consider the
AMD A6 6420B

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Higher clock speed 4 GHz vs 3.5 GHz Around 15% higher clock speed
Much higher GPU clock speed 800 MHz vs 350 MHz More than 2.2x higher GPU clock speed
Higher turbo clock speed 4.2 GHz vs 3.9 GHz Around 10% higher turbo clock speed
Significantly lower typical power consumption 52.81W vs 73.94W Around 30% lower typical power consumption
More l2 cache per core 0.5 MB/core vs 0.25 MB/core 2x more l2 cache per core
Higher Maximum operating temperature 70 °C vs 64 °C Around 10% higher Maximum operating temperature
Significantly lower annual home energy cost 15.66 $/year vs 21.92 $/year Around 30% lower annual home energy cost
Significantly lower annual commercial energy cost 56.94 $/year vs 79.72 $/year Around 30% lower annual commercial energy cost

Benchmarks Real world tests of Core i5 6600K vs A6 6420B

PassMark Data courtesy Passmark

A6 6420B
2,612

PassMark (Single Core)

A6 6420B
1,580

Specifications Full list of technical specs

summary

Core i5 6600K  vs
A6 6420B 
Clock speed 3.5 GHz 4 GHz
Turbo clock speed 3.9 GHz 4.2 GHz
Cores Quad core Dual core
Is unlocked Yes No

features

Has virtualization support Yes Yes
Instruction set extensions
SSE2
MMX
SSE4
AVX
SSE3
SSE
SSE4.1
FMA4
SSE4.2
Supplemental SSE3
AES
AVX 2.0

power consumption

TDP 91W 65W
Annual home energy cost 21.92 $/year 15.66 $/year
Annual commercial energy cost 79.72 $/year 56.94 $/year
Performance per watt 2.45 pt/W 2.18 pt/W
Typical power consumption 73.94W 52.81W

details

Core i5 6600K  vs
A6 6420B 
Threads 4 2
L2 cache 1 MB 1 MB
L2 cache per core 0.25 MB/core 0.5 MB/core
L3 cache 6 MB None
Manufacture process 14 nm 32 nm
Operating temperature Unknown - 64°C Unknown - 70°C

overclocking

Overclocked clock speed 4.54 GHz 4 GHz
Overclocked clock speed (Water) 4.57 GHz 4 GHz
Overclocked clock speed (Air) 4.54 GHz 4 GHz

integrated graphics

GPU GPU GPU
Label Intel® HD Graphics 530 Radeon™ HD 8470D
GPU clock speed 350 MHz 800 MHz

memory controller

Memory controller Built-in Built-in
Memory type
DDR3-1866
DDR3L-1600
Intel Core i5 6600K
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AMD A6 6420B
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