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Differences What are the advantages of each

Front view of AMD Sempron X2 2100

Reasons to consider the
AMD Sempron X2 2100

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CPUBoss is not aware of any important advantages of the Sempron X2 2100 vs the A4 4000.

Front view of AMD A4 4000

Reasons to consider the
AMD A4 4000

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Much higher clock speed 3 GHz vs 1.8 GHz More than 65% higher clock speed
Much newer manufacturing process 32 nm vs 65 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Much better PassMark score 1,809 vs 869 More than 2x better PassMark score
Much better PassMark (Single core) score 1,103 vs 555 Around 2x better PassMark (Single core) score
Much better performance per watt 5.4 pt/W vs 0.6 pt/W More than 9x better performance per watt
Much better overclocked clock speed (Air) 4.02 GHz vs 2.95 GHz More than 35% better overclocked clock speed (Air)
Much better overclocked clock speed (Water) 3.49 GHz vs 1.8 GHz Around 95% better overclocked clock speed (Water)

Benchmarks Real world tests of Sempron X2 2100 vs A4 4000

GeekBench 3 (Multi-core) Data courtesy Primate Labs

A4 4000
2,519

GeekBench 3 (Single core) Data courtesy Primate Labs

GeekBench 3 (AES single core) Data courtesy Primate Labs

Sempron X2 2100
49.8 MB/s
A4 4000
1,830,000 MB/s

PassMark Data courtesy Passmark

PassMark (Single Core)

Specifications Full list of technical specs

summary

Sempron X2 2100  vs
A4 4000 
Clock speed 1.8 GHz 3 GHz
Cores Dual core Dual core

features

Has a NX bit 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
3DNow!
Supplemental SSE3
AES
TBM

details

Sempron X2 2100  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 65 nm 32 nm
Max CPUs 1 1

overclocking

Overclocked clock speed 2.95 GHz 4.02 GHz
Overclocked clock speed (Water) 1.8 GHz 3.49 GHz
Overclocked clock speed (Air) 2.95 GHz 4.02 GHz

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 0.6 pt/W 5.4 pt/W
Typical power consumption 52.81W 52.81W
AMD Sempron X2 2100
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AMD A4 4000
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