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Differences What are the advantages of each

Front view of AMD Athlon 850

Reasons to consider the
AMD Athlon 850

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CPUBoss is not aware of any important advantages of the Athlon 850 vs the A6 6400K.

Front view of AMD A6 6400K

Reasons to consider the
AMD A6 6400K

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Much newer manufacturing process 32 nm vs 180 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Much higher clock speed 3.9 GHz vs 0.85 GHz More than 4.5x higher clock speed
Much more l2 cache 1 MB vs 0.5 MB 2x more l2 cache; more data can be stored in the l2 cache for quick access later
Much better overclocked clock speed (Air) 4.76 GHz vs 0.89 GHz More than 5.2x better overclocked clock speed (Air)
More cores 2 vs 1 Twice as many cores; run more applications at once
More threads 2 vs 1 Twice as many threads
Has a NX bit Yes vs No Somewhat common; Prevents a common class of security exploits
Much better overclocked clock speed (Water) 5.16 GHz vs 0.85 GHz More than 6x better overclocked clock speed (Water)

Features Key features of the Athlon 850  vs A6 6400K 

clock speed

Athlon 850
0.85 GHz
A6 6400K
3.9 GHz

L2 cache

Athlon 850
0.5 MB
A6 6400K
1 MB

overclocked clock speed (air)

Athlon 850
0.89 GHz
A6 6400K
4.76 GHz

overclocked clock speed (water)

Athlon 850
0.85 GHz
A6 6400K
5.16 GHz

Specifications Full list of technical specs

summary

Athlon 850  vs
A6 6400K 
Clock speed 0.85 GHz 3.9 GHz
Cores Single core Dual core

features

Has a NX bit No Yes
Instruction set extensions
SSE4a
AVX 1.1
SSE2
F16C
MMX
XOP
AVX
SSE3
SSE
BMI1
AMD64
SSE4.1
FMA4
FMA3
SSE4.2
ABM
CVT16
AMD-V
3DNow!
Supplemental SSE3
AES
TBM

details

Athlon 850  vs
A6 6400K 
Threads 1 2
L2 cache 0.5 MB 1 MB
L2 cache per core 0.5 MB/core 0.5 MB/core
Manufacture process 180 nm 32 nm
Max CPUs 1 1

overclocking

Overclocked clock speed 0.89 GHz 4.76 GHz
Overclocked clock speed (Water) 0.85 GHz 5.16 GHz
Overclocked clock speed (Air) 0.89 GHz 4.76 GHz

power consumption

Typical power consumption N/A 52.81W
AMD Athlon 850
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AMD A6 6400K
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