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Differences What are the advantages of each

Front view of Intel Core i5 4670K

Reasons to consider the
Intel Core i5 4670K

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More cores 4 vs 2 Twice as many cores; run more applications at once
More threads 4 vs 2 Twice as many threads
Much newer manufacturing process 22 nm vs 32 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Higher Maximum operating temperature 72.72 °C vs 70 °C Around 5% higher Maximum operating temperature
Front view of AMD A6 6420K

Reasons to consider the
AMD A6 6420K

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Much higher clock speed 4 GHz vs 3.4 GHz Around 20% higher clock speed
Much more l2 cache per core 0.5 MB/core vs 0.25 MB/core 2x more l2 cache per core
Significantly lower typical power consumption 52.81W vs 68.25W Around 25% lower typical power consumption
Significantly lower annual home energy cost 15.66 $/year vs 20.24 $/year Around 25% lower annual home energy cost
Significantly lower annual commercial energy cost 56.94 $/year vs 73.58 $/year Around 25% lower annual commercial energy cost
Newer Jan, 2014 vs Apr, 2013 Release date 9 months later

Benchmarks Real world tests of Core i5 4670K vs A6 6420K

GeekBench 3 (Multi-core) Data courtesy Primate Labs

Core i5 4670K
11,554
A6 6420K
3,501

GeekBench 3 (Single core) Data courtesy Primate Labs

A6 6420K
2,245

GeekBench 3 (AES single core) Data courtesy Primate Labs

Core i5 4670K
4,930,000 MB/s
A6 6420K
2,770 MB/s

PassMark Data courtesy Passmark

A6 6420K
2,251

PassMark (Single Core)

A6 6420K
1,428

Specifications Full list of technical specs

summary

Core i5 4670K  vs
A6 6420K 
Clock speed 3.4 GHz 4 GHz
Turbo clock speed 3.8 GHz 4.2 GHz
Cores Quad core Dual 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
SSE4a
AVX 1.1
SSE2
F16C
MMX
SSE4
XOP
AVX
SSE3
EM64T
SSE
BMI1
AMD64
SSE4.1
FMA4
FMA3
SSE4.2
ABM
CVT16
AMD-V
Supplemental SSE3
AES
TBM
AVX 2.0
Supports dynamic frequency scaling Yes Yes

memory controller

Memory controller Built-in Built-in
Memory type
DDR3-1600
DDR3L-1600
DDR3-1333
DDR3
Channels Dual Channel Dual Channel
Supports ECC No No
Maximum bandwidth 25,600 MB/s 12,800 MB/s

details

Core i5 4670K  vs
A6 6420K 
Architecture x86-64 x86-64
Threads 4 2
L2 cache 1 MB 1 MB
L2 cache per core 0.25 MB/core 0.5 MB/core
Manufacture process 22 nm 32 nm
Max CPUs 1 1
Operating temperature Unknown - 72.72°C Unknown - 70°C

integrated graphics

GPU GPU GPU
Label Intel® HD Graphics 4600 Radeon HD 8000 series

power consumption

TDP 84W 65W
Annual home energy cost 20.24 $/year 15.66 $/year
Annual commercial energy cost 73.58 $/year 56.94 $/year
Performance per watt 11.19 pt/W 1.61 pt/W
Typical power consumption 68.25W 52.81W
Intel Core i5 4670K
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AMD A6 6420K
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