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Differences What are the advantages of each

Front view of AMD A6 5400K

Reasons to consider the
AMD A6 5400K

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Is unlocked Yes vs No Somewhat common; An unlocked multiplier allows for easier overclocking
Much better overclocked clock speed (Air) 4.46 GHz vs 3.6 GHz Around 25% better overclocked clock speed (Air)
Much better overclocked clock speed (Water) 5.03 GHz vs 3.6 GHz Around 40% better overclocked clock speed (Water)
Front view of AMD A6 5400B

Reasons to consider the
AMD A6 5400B

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CPUBoss is not aware of any important advantages of the 5400B vs the 5400K.

Benchmarks Real world tests of A6 5400K vs 5400B

GeekBench 3 (Multi-core) Data courtesy Primate Labs

A6 5400K
2,916
A6 5400B
2,867.5

GeekBench 3 (Single core) Data courtesy Primate Labs

A6 5400K
1,906
A6 5400B
1,864.5

GeekBench 3 (AES single core) Data courtesy Primate Labs

A6 5400K
2,125,000 MB/s
A6 5400B
2,030 MB/s

GeekBench (32-bit) Data courtesy Primate Labs

A6 5400K
2,817
A6 5400B
2,767

GeekBench

A6 5400K
2,817
A6 5400B
2,767

PassMark Data courtesy Passmark

A6 5400K
2,139
A6 5400B
2,178

PassMark (Single Core)

A6 5400K
1,356
A6 5400B
1,320

Specifications Full list of technical specs

summary

A6 5400K  vs
5400B 
Clock speed 3.6 GHz 3.6 GHz
Turbo clock speed 3.8 GHz 3.8 GHz
Cores Dual core Dual core
Is unlocked Yes No

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 65W 65W
Annual home energy cost 15.66 $/year 15.66 $/year
Annual commercial energy cost 56.94 $/year 56.94 $/year
Performance per watt 6.62 pt/W 1.42 pt/W
Typical power consumption 52.81W 52.81W

details

A6 5400K  vs
5400B 
Threads 2 2
L2 cache 1 MB 1 MB
L2 cache per core 0.5 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 - 70°C Unknown - 70°C

overclocking

Overclocked clock speed 4.46 GHz 3.6 GHz
Overclocked clock speed (Water) 5.03 GHz 3.6 GHz
Overclocked clock speed (Air) 4.46 GHz 3.6 GHz

integrated graphics

GPU GPU GPU
Label Radeon™ HD 7540D 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 A6 5400K
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AMD A6 5400B
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