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Differences What are the advantages of each

Front view of Intel Core i5 520M

Reasons to consider the
Intel Core i5 520M

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Much newer manufacturing process 32 nm vs 130 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Much higher clock speed 2.4 GHz vs 0.67 GHz More than 3.5x higher clock speed
Has a NX bit Yes vs No Somewhat common; Prevents a common class of security exploits
More l2 cache 0.5 MB vs 0.25 MB 2x more l2 cache; more data can be stored in the l2 cache for quick access later
Much better overclocked clock speed (Air) 2.86 GHz vs 1.01 GHz More than 2.8x better overclocked clock speed (Air)
More threads 4 vs 1 3 more threads
More cores 2 vs 1 Twice as many cores; run more applications at once
Much better overclocked clock speed (Water) 2.4 GHz vs 0.67 GHz More than 3.5x better overclocked clock speed (Water)
Front view of AMD Geode NX 1250

Reasons to consider the
AMD Geode NX 1250

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Significantly lower typical power consumption 7.31W vs 28.44W 3.9x lower typical power consumption
Significantly lower annual home energy cost 2.17 $/year vs 8.43 $/year 3.9x lower annual home energy cost
Significantly lower annual commercial energy cost 7.88 $/year vs 30.66 $/year 3.9x lower annual commercial energy cost

Features Key features of the Core i5 520M  vs Geode NX 1250 

clock speed

Core i5 520M
2.4 GHz
Geode NX 1250
0.67 GHz

L2 cache

Core i5 520M
0.5 MB
Geode NX 1250
0.25 MB

overclocked clock speed (air)

Core i5 520M
2.86 GHz
Geode NX 1250
1.01 GHz

overclocked clock speed (water)

Core i5 520M
2.4 GHz
Geode NX 1250
0.67 GHz

Specifications Full list of technical specs

summary

Core i5 520M  vs
Geode NX 1250 
Clock speed 2.4 GHz 0.67 GHz
Cores Dual core Single core
Socket type
BGA 1288
rPGA 988A
462

features

Has a NX bit Yes No
Instruction set extensions
SSE2
MMX
SSE4
SSE3
SSE
SSE4.1
SSE4.2
3DNow!
Supplemental SSE3
AES
Supports dynamic frequency scaling Yes Yes

details

Core i5 520M  vs
Geode NX 1250 
Threads 4 1
L2 cache 0.5 MB 0.25 MB
L2 cache per core 0.25 MB/core 0.25 MB/core
Manufacture process 32 nm 130 nm
Max CPUs 1 1

overclocking

Overclocked clock speed 2.86 GHz 1.01 GHz
Overclocked clock speed (Water) 2.4 GHz 0.67 GHz
Overclocked clock speed (Air) 2.86 GHz 1.01 GHz

power consumption

TDP 35W 9W
Annual home energy cost 8.43 $/year 2.17 $/year
Annual commercial energy cost 30.66 $/year 7.88 $/year
Typical power consumption 28.44W 7.31W
Intel Core i5 520M
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AMD Geode NX 1250
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