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Differences What are the advantages of each

Front view of Intel Atom E660

Reasons to consider the
Intel Atom E660

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Has a built-in GPU Yes vs No Somewhat common; A separate graphics adapter is not required
Supports dynamic frequency scaling Yes vs No Somewhat common; Allows for maximum performance when needed, while conserving power and minimizing heat production when not needed
Lower typical power consumption 2.92W vs 7.72W 2.6x lower typical power consumption
Lower annual home energy cost 0.87 $/year vs 2.29 $/year 2.6x lower annual home energy cost
Lower annual commercial energy cost 3.15 $/year vs 8.32 $/year 2.6x lower annual commercial energy cost
Front view of Intel Atom C2508

Reasons to consider the
Intel Atom C2508

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Much newer manufacturing process 22 nm vs 45 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
More cores 4 vs 1 3 more cores; run more applications at once
Newer Apr, 2014 vs Sep, 2010 Release date over 3 years later
More threads 4 vs 2 Twice as many threads

Features Key features of the Atom E660  vs C2508 

clock speed

Atom E660
1.3 GHz
Atom C2508
1.25 GHz

overclocked clock speed (air)

Atom E660
1.3 GHz
Atom C2508
1.25 GHz

overclocked clock speed (water)

Atom E660
1.3 GHz
Atom C2508
1.25 GHz

TDP

Atom E660
3.6W
Atom C2508
9.5W

Specifications Full list of technical specs

summary

Atom E660  vs
C2508 
Clock speed 1.3 GHz 1.25 GHz
Cores Single core Quad core

features

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

power consumption

TDP 3.6W 9.5W
Annual home energy cost 0.87 $/year 2.29 $/year
Annual commercial energy cost 3.15 $/year 8.32 $/year
Typical power consumption 2.92W 7.72W

bus

Architecture FSB FSB
Number of links 1 1

details

Atom E660  vs
C2508 
Threads 2 4
Manufacture process 45 nm 22 nm
Max CPUs 1 1

overclocking

Overclocked clock speed 1.3 GHz 1.25 GHz
Overclocked clock speed (Water) 1.3 GHz 1.25 GHz
Overclocked clock speed (Air) 1.3 GHz 1.25 GHz

integrated graphics

GPU GPU None
Label Integrated N/A
GPU clock speed 400 MHz N/A

memory controller

Memory controller Built-in Built-in
Memory type
DDR3-1333
DDR2-800
DDR3
DDR2
Channels Single Channel Dual Channel
Supports ECC No Yes
Maximum bandwidth 6,400 MB/s 21,333.32 MB/s
Maximum memory size 2,048 MB 32,768 MB
Intel Atom E660
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Intel Atom C2508
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