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Differences What are the advantages of each

Front view of AMD Athlon II X2 240

Reasons to consider the
AMD Athlon II X2 240

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Much more l2 cache 2 MB vs 1 MB 2x more l2 cache; more data can be stored in the l2 cache for quick access later
Much newer manufacturing process 32 nm vs 65 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Much better geekbench 2 (32-bit) score 2,513 vs 2,081 More than 20% better geekbench 2 (32-bit) score
Much better performance per watt 1.67 pt/W vs 0.69 pt/W Around 2.5x better performance per watt
Much more l2 cache per core 1 MB/core vs 0.5 MB/core 2x more l2 cache per core
Significantly lower typical power consumption 52.81W vs 72.31W More than 25% lower typical power consumption
Much better overclocked clock speed (Air) 3.67 GHz vs 3.25 GHz Around 15% better overclocked clock speed (Air)
Significantly lower annual home energy cost 15.66 $/year vs 21.44 $/year More than 25% lower annual home energy cost
Significantly lower annual commercial energy cost 56.94 $/year vs 77.96 $/year More than 25% lower annual commercial energy cost
Front view of AMD Athlon 64 X2 5800+

Reasons to consider the
AMD Athlon 64 X2 5800+

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Higher clock speed 3 GHz vs 2.8 GHz More than 5% higher clock speed
Significantly better overclocked clock speed (Water) 3.38 GHz vs 2.8 GHz More than 20% better overclocked clock speed (Water)

Benchmarks Real world tests of Athlon II X2 240 vs 64 X2 5800+

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

Athlon II X2 240
112,300 MB/s
Athlon 64 X2 5800+
80.1 MB/s

GeekBench (32-bit) Data courtesy Primate Labs

GeekBench

PassMark Data courtesy Passmark

PassMark (Single Core)

Specifications Full list of technical specs

summary

Athlon II X2 240  vs
64 X2 5800+ 
Clock speed 2.8 GHz 3 GHz
Cores Dual core Dual core
Socket type
AM3
AM2

features

Has a NX bit Yes Yes
Has virtualization support Yes Yes
Instruction set extensions
SSE4a
AVX 1.1
SSE2
F16C
MMX
XOP
SSE3
SSE
CLMUL
AMD64
SSE4.1
FMA4
SSE4.2
CVT16
AMD-V
3DNow!
AES
Supports dynamic frequency scaling Yes Yes

details

Athlon II X2 240  vs
64 X2 5800+ 
Threads 2 2
L2 cache 2 MB 1 MB
L2 cache per core 1 MB/core 0.5 MB/core
Manufacture process 32 nm 65 nm
Max CPUs 1 1

overclocking

Overclocked clock speed 3.67 GHz 3.25 GHz
Overclocked clock speed (Water) 2.8 GHz 3.38 GHz
PassMark (Overclocked) 2,103.5 1,554.5
Overclocked clock speed (Air) 3.67 GHz 3.25 GHz

power consumption

TDP 65W 89W
Annual home energy cost 15.66 $/year 21.44 $/year
Annual commercial energy cost 56.94 $/year 77.96 $/year
Performance per watt 1.67 pt/W 0.69 pt/W
Typical power consumption 52.81W 72.31W
AMD Athlon II X2 240
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AMD Athlon 64 X2 5800+
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