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Differences What are the advantages of each

Front view of AMD Athlon X4 760K

Reasons to consider the
AMD Athlon X4 760K

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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
Front view of AMD A6 6400K

Reasons to consider the
AMD A6 6400K

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Has a built-in GPU Yes vs No Somewhat common; A separate graphics adapter is not required
Much lower typical power consumption 52.81W vs 81.25W 35% lower typical power consumption
Higher clock speed 3.9 GHz vs 3.8 GHz Around 5% higher clock speed
Better overclocked clock speed (Air) 4.76 GHz vs 4.6 GHz Around 5% better overclocked clock speed (Air)
Much better overclocked clock speed (Water) 5.16 GHz vs 3.8 GHz More than 35% better overclocked clock speed (Water)
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

Benchmarks Real world tests of Athlon X4 760K vs A6 6400K

GeekBench 3 (Multi-core) Data courtesy Primate Labs

A6 6400K
3,328

GeekBench 3 (Single core) Data courtesy Primate Labs

A6 6400K
2,108

GeekBench 3 (AES single core) Data courtesy Primate Labs

Athlon X4 760K
2,380,000 MB/s
A6 6400K
2,380,000 MB/s

GeekBench (32-bit) Data courtesy Primate Labs

A6 6400K
4,094

GeekBench

A6 6400K
4,094

3D Mark 11 (Physics)

A6 6400K
3,710

PassMark Data courtesy Passmark

A6 6400K
2,291

PassMark (Single Core)

A6 6400K
1,404

Specifications Full list of technical specs

summary

Athlon X4 760K  vs
A6 6400K 
Clock speed 3.8 GHz 3.9 GHz
Turbo clock speed 4.1 GHz 4.1 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
AVX
SSE3
SSE
BMI1
AMD64
SSE4.1
FMA4
FMA3
SSE4.2
ABM
CVT16
AMD-V
Supplemental SSE3
AES
TBM
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 9.4 pt/W 7.25 pt/W
Typical power consumption 81.25W 52.81W

details

Athlon X4 760K  vs
A6 6400K 
Architecture x86-64 x86-64
Threads 4 2
L2 cache 4 MB 1 MB
L2 cache per core 1 MB/core 0.5 MB/core
L3 cache 0 MB None
Manufacture process 32 nm 32 nm
Max CPUs 1 1

overclocking

Overclocked clock speed 4.6 GHz 4.76 GHz
Overclocked clock speed (Water) 3.8 GHz 5.16 GHz
Overclocked clock speed (Air) 4.6 GHz 4.76 GHz

integrated graphics

GPU None GPU
Label N/A Radeon™ HD 8470D
Latest DirectX N/A 11.0
GPU clock speed N/A 800 MHz

memory controller

Memory controller Built-in Built-in
Memory type
DDR3-1866
AMD Athlon X4 760K
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AMD A6 6400K
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