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Differences What are the advantages of each

Front view of AMD A10 5800K

Reasons to consider the
AMD A10 5800K

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Is unlocked Yes vs No Somewhat common; An unlocked multiplier allows for easier overclocking
Front view of AMD A10 5800B

Reasons to consider the
AMD A10 5800B

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CPUBoss is not aware of any important advantages of the 5800B vs the 5800K.

Benchmarks Real world tests of A10 5800K vs 5800B

GeekBench (32-bit) Data courtesy Primate Labs

A10 5800K
5,765
A10 5800B
6,487

GeekBench

A10 5800K
8,036
A10 5800B
6,487

PassMark Data courtesy Passmark

A10 5800K
4,636
A10 5800B
4,572

PassMark (Single Core)

A10 5800K
1,460
A10 5800B
1,527

Specifications Full list of technical specs

summary

A10 5800K  vs
5800B 
Clock speed 3.8 GHz 3.8 GHz
Turbo clock speed 4.2 GHz 4.2 GHz
Cores Quad core Quad 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 100W 100W
Annual home energy cost 24.09 $/year 24.09 $/year
Annual commercial energy cost 87.6 $/year 87.6 $/year
Performance per watt 5.49 pt/W 1.79 pt/W
Typical power consumption 81.25W 81.25W

details

A10 5800K  vs
5800B 
Threads 4 4
L2 cache 4 MB 4 MB
L2 cache per core 1 MB/core 1 MB/core
L3 cache 1 MB 1 MB
L3 cache per core 0.25 MB/core 0.25 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 - 74°C

overclocking

Overclocked clock speed 4.48 GHz 4.37 GHz
Overclocked clock speed (Water) 4.59 GHz 3.8 GHz
Overclocked clock speed (Air) 4.48 GHz 4.37 GHz

integrated graphics

GPU GPU GPU
Label Radeon™ HD 7660D Radeon™ HD 7660D
Latest DirectX 11.0 11.0
GPU clock speed 800 MHz 800 MHz

memory controller

Memory controller Built-in Built-in
Memory type
DDR3-1866
AMD A10 5800K
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AMD A10 5800B
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