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Differences What are the advantages of each

Front view of AMD Athlon X2 340

Reasons to consider the
AMD Athlon X2 340

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Higher clock speed 3.2 GHz vs 3 GHz More than 5% higher clock speed
Better overclocked clock speed (Air) 4.1 GHz vs 4.02 GHz Almost the same
Front view of AMD A4 4000

Reasons to consider the
AMD A4 4000

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Has a built-in GPU Yes vs No Somewhat common; A separate graphics adapter is not required
Better overclocked clock speed (Water) 3.49 GHz vs 3.2 GHz Around 10% better overclocked clock speed (Water)
Newer May, 2013 vs Oct, 2012 Release date 7 months later

Benchmarks Real world tests of Athlon X2 340 vs A4 4000

GeekBench 3 (Multi-core) Data courtesy Primate Labs

A4 4000
2,519

GeekBench 3 (Single core) Data courtesy Primate Labs

A4 4000
1,622

GeekBench 3 (AES single core) Data courtesy Primate Labs

Athlon X2 340
1,975,000 MB/s
A4 4000
1,830,000 MB/s

PassMark Data courtesy Passmark

A4 4000
1,809

PassMark (Single Core)

A4 4000
1,103

Specifications Full list of technical specs

summary

Athlon X2 340  vs
A4 4000 
Clock speed 3.2 GHz 3 GHz
Turbo clock speed 3.6 GHz 3 GHz
Cores Dual core Dual core

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
CLMUL
AMD64
SSE4.1
FMA4
FMA3
SSE4.2
ABM
CVT16
AMD-V
Supplemental SSE3
AES
TBM
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 11.57 pt/W 5.4 pt/W
Typical power consumption 52.81W 52.81W

details

Athlon X2 340  vs
A4 4000 
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
Max CPUs 1 1
Voltage range 0.82 - 1.48V 0.8 - 1.45V

overclocking

Overclocked clock speed 4.1 GHz 4.02 GHz
Overclocked clock speed (Water) 3.2 GHz 3.49 GHz
Overclocked clock speed (Air) 4.1 GHz 4.02 GHz

integrated graphics

GPU None GPU
Label N/A Radeon™ HD 7480D
Latest DirectX N/A 11.0
GPU clock speed N/A 720 MHz

memory controller

Memory controller Built-in Built-in
Memory type
DDR3-1866
DDR3-1600
DDR3-1333
AMD Athlon X2 340
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AMD A4 4000
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