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Differences What are the advantages of each

Front view of AMD Sempron 3400+

Reasons to consider the
AMD Sempron 3400+

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Slightly better overclocked clock speed (Air) 2.44 GHz vs 2.25 GHz Around 10% better overclocked clock speed (Air)
Slightly better overclocked clock speed (Water) 2 GHz vs 1.8 GHz More than 10% better overclocked clock speed (Water)
Front view of AMD Athlon 64 X2 3400+

Reasons to consider the
AMD Athlon 64 X2 3400+

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Significantly more l2 cache 1 MB vs 0 MB Compared to all cpus, 1 MB l2 cache is just OK
Has virtualization support Yes vs No Somewhat common; Boosts performance of virtual machines
Significantly lower typical power consumption 28.44W vs 50.38W Around 45% lower typical power consumption
Much more l2 cache per core 0.5 MB/core vs 0 MB/core Compared to all cpus, 0.5 MB/core l2 cache per core is just OK
Significantly higher Maximum operating temperature 78 °C vs 55 °C More than 40% higher Maximum operating temperature
More cores 2 vs 1 Twice as many cores; run more applications at once
Better geekbench 3 Multi-Core score 1,295 vs 770 Around 70% better geekbench 3 Multi-Core score
Significantly lower annual home energy cost 8.43 $/year vs 14.94 $/year Around 45% lower annual home energy cost
Significantly lower annual commercial energy cost 30.66 $/year vs 54.31 $/year Around 45% lower annual commercial energy cost

Benchmarks Real world tests of Sempron 3400+ vs Athlon 64 X2 3400+

GeekBench 3 (Multi-core) Data courtesy Primate Labs

GeekBench 3 (Single core) Data courtesy Primate Labs

GeekBench 3 (AES single core) Data courtesy Primate Labs

Sempron 3400+
48.8 MB/s
Athlon 64 X2 3400+
48.7 MB/s

Specifications Full list of technical specs

summary

Sempron 3400+  vs
Athlon 64 X2 3400+ 
Clock speed 1.8 GHz 1.8 GHz
Cores Single core Dual core
Socket type
AM2
754
939

features

Has a NX bit Yes Yes
Has virtualization support No Yes
Instruction set extensions
SSE2
MMX
SSE3
SSE
3DNow!
Supports dynamic frequency scaling Yes Yes

details

Sempron 3400+  vs
Athlon 64 X2 3400+ 
Threads 1 2
L2 cache 0 MB 1 MB
L2 cache per core 0 MB/core 0.5 MB/core
Manufacture process 90 nm 90 nm
Max CPUs 1 1
Operating temperature Unknown - 55°C Unknown - 78°C

overclocking

Overclocked clock speed 2.44 GHz 2.25 GHz
Overclocked clock speed (Water) 2 GHz 1.8 GHz
PassMark (Overclocked) 1,043.3 1,253.7
Overclocked clock speed (Air) 2.44 GHz 2.25 GHz

power consumption

TDP 62W 35W
Annual home energy cost 14.94 $/year 8.43 $/year
Annual commercial energy cost 54.31 $/year 30.66 $/year
Performance per watt 0.5 pt/W 0.85 pt/W
Typical power consumption 50.38W 28.44W
AMD Sempron 3400+
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AMD Athlon 64 X2 3400+
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