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Differences What are the advantages of each

Front view of AMD A8 5600K

Reasons to consider the
AMD A8 5600K

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Much more l2 cache 4 MB vs 1 MB 4x more l2 cache; more data can be stored in the l2 cache for quick access later
More cores 4 vs 2 Twice as many cores; run more applications at once
More threads 4 vs 2 Twice as many threads
Much more l2 cache per core 1 MB/core vs 0.5 MB/core 2x more l2 cache per core
Significantly higher Maximum operating temperature 74 °C vs 70 °C More than 5% higher Maximum operating temperature
Front view of AMD A6 5400K

Reasons to consider the
AMD A6 5400K

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Much lower typical power consumption 52.81W vs 81.25W 35% lower typical power consumption
Better overclocked clock speed (Air) 4.46 GHz vs 4.29 GHz Around 5% better overclocked clock speed (Air)
Much lower annual home energy cost 15.66 $/year vs 24.09 $/year 35% lower annual home energy cost
Much lower annual commercial energy cost 56.94 $/year vs 87.6 $/year 35% lower annual commercial energy cost
Better overclocked clock speed (Water) 5.03 GHz vs 4.71 GHz More than 5% better overclocked clock speed (Water)

Benchmarks Real world tests of A8 5600K vs A6 5400K

CompuBench 1.5 (Bitcoin mining) Data courtesy CompuBench

A8 5600K
41.89 mHash/s
A6 5400K
38.48 mHash/s

CompuBench 1.5 (T-Rex) Data courtesy CompuBench

A8 5600K
0.49 fps
A6 5400K
0.47 fps

PCMark 8 Home 3.0 Accelerated Data courtesy FutureMark

A8 5600K
2,708
A6 5400K
2,281

Sky Diver Data courtesy FutureMark

A8 5600K
2,631
A6 5400K
1,924

Cloud Gate Data courtesy FutureMark

A8 5600K
5,352
A6 5400K
2,712

GeekBench 3 (Multi-core) Data courtesy Primate Labs

A8 5600K
5,682
A6 5400K
2,916

GeekBench 3 (Single core) Data courtesy Primate Labs

A8 5600K
1,989
A6 5400K
1,906

GeekBench 3 (AES single core) Data courtesy Primate Labs

A8 5600K
2,210,000 MB/s
A6 5400K
2,125,000 MB/s

Specifications Full list of technical specs

summary

A8 5600K  vs
A6 5400K 
Clock speed 3.6 GHz 3.6 GHz
Turbo clock speed 3.9 GHz 3.8 GHz
Cores Quad core Dual core
Is unlocked Yes Yes

features

Has a NX bit Yes Yes
Has virtualization support Yes Yes
Instruction set extensions
SSE4a
AVX 1.1
SSE2
F16C
MMX
XOP
SSE3
SSE
CLMUL
AMD64
SSE4.1
FMA4
SSE4.2
CVT16
AMD-V
AES
Supports dynamic frequency scaling Yes Yes

power consumption

TDP 100W 65W
Annual home energy cost 24.09 $/year 15.66 $/year
Annual commercial energy cost 87.6 $/year 56.94 $/year
Performance per watt 4.86 pt/W 6.62 pt/W
Typical power consumption 81.25W 52.81W

details

A8 5600K  vs
A6 5400K 
Threads 4 2
L2 cache 4 MB 1 MB
L2 cache per core 1 MB/core 0.5 MB/core
Manufacture process 32 nm 32 nm
Transistor count 1,303,000,000 1,303,000,000
Max CPUs 1 1
Die size 246 mm² 246 mm²
Voltage range 0.82 - 1.48V 0.82 - 1.48V
Operating temperature Unknown - 74°C Unknown - 70°C

overclocking

Overclock popularity 12 8
Overclocked clock speed 4.29 GHz 4.46 GHz
Overclocked clock speed (Water) 4.71 GHz 5.03 GHz
PassMark (Overclocked) 2,659.2 1,170.5
Overclocked clock speed (Air) 4.29 GHz 4.46 GHz

integrated graphics

GPU GPU GPU
Label Radeon™ HD 7560D Radeon™ HD 7540D
Latest DirectX 11.0 11.0
GPU clock speed 760 MHz 760 MHz

memory controller

Memory controller Built-in Built-in
Memory type
DDR3-1866
AMD A8 5600K
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AMD A6 5400K
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