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Differences What are the advantages of each

Front view of Intel Core i3 550

Reasons to consider the
Intel Core i3 550

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Much higher clock speed 3.2 GHz vs 0.6 GHz More than 5.2x higher clock speed
Much newer manufacturing process 32 nm vs 45 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Much better overclocked clock speed (Air) 4.54 GHz vs 0.6 GHz More than 7.5x better overclocked clock speed (Air)
Has a NX bit Yes vs No Somewhat common; Prevents a common class of security exploits
Much better overclocked clock speed (Water) 3.2 GHz vs 0.6 GHz More than 5.2x better overclocked clock speed (Water)
More cores 2 vs 1 Twice as many cores; run more applications at once
More threads 4 vs 2 Twice as many threads
Front view of Intel Atom E625CT

Reasons to consider the
Intel Atom E625CT

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Much lower typical power consumption 5.69W vs 59.31W 10.4x lower typical power consumption
More l2 cache per core 0.5 MB/core vs 0.25 MB/core 2x more l2 cache per core
Much lower annual home energy cost 1.69 $/year vs 17.59 $/year 10.4x lower annual home energy cost
Much lower annual commercial energy cost 6.13 $/year vs 63.95 $/year 10.4x lower annual commercial energy cost
Newer Nov, 2010 vs Apr, 2010 Release date 7 months later

Features Key features of the Core i3 550  vs Atom E625CT 

clock speed

Core i3 550
3.2 GHz
Atom E625CT
0.6 GHz

L2 cache

Core i3 550
0.5 MB
Atom E625CT
0.5 MB

overclocked clock speed (air)

Core i3 550
4.54 GHz
Atom E625CT
0.6 GHz

overclocked clock speed (water)

Core i3 550
3.2 GHz
Atom E625CT
0.6 GHz

Specifications Full list of technical specs

summary

Core i3 550  vs
Atom E625CT 
Clock speed 3.2 GHz 0.6 GHz
Cores Dual core Single core

features

Has a NX bit Yes No
Has virtualization support Yes Yes
Instruction set extensions
SSE2
MMX
SSE4
SSE3
SSE
SSE4.1
SSE4.2
Supplemental SSE3
Supports dynamic frequency scaling Yes Yes

details

Core i3 550  vs
Atom E625CT 
Threads 4 2
L2 cache 0.5 MB 0.5 MB
L2 cache per core 0.25 MB/core 0.5 MB/core
Manufacture process 32 nm 45 nm

overclocking

Overclocked clock speed 4.54 GHz 0.6 GHz
Overclocked clock speed (Water) 3.2 GHz 0.6 GHz
Overclocked clock speed (Air) 4.54 GHz 0.6 GHz

power consumption

TDP 73W 7W
Annual home energy cost 17.59 $/year 1.69 $/year
Annual commercial energy cost 63.95 $/year 6.13 $/year
Typical power consumption 59.31W 5.69W
Intel Core i3 550
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Intel Atom E625CT
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