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Differences What are the advantages of each

Front view of Intel Atom N270

Reasons to consider the
Intel Atom N270

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Higher clock speed 1.6 GHz vs 1.3 GHz Around 25% higher clock speed
Much better performance per watt 9.71 pt/W vs 3.07 pt/W Around 3.2x better performance per watt
Much better performance per dollar 0.76 pt/$ vs 0.2 pt/$ Around 3.8x better performance per dollar
Better overclocked clock speed (Air) 1.87 GHz vs 1.3 GHz Around 45% better overclocked clock speed (Air)
Better overclocked clock speed (Water) 1.6 GHz vs 1.3 GHz Around 25% better overclocked clock speed (Water)
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
Has virtualization support Yes vs No Somewhat common; Boosts performance of virtual machines
Newer Sep, 2010 vs Jun, 2008 Release date over 2 years later

Benchmarks Real world tests of Atom N270 vs E660

PassMark Data courtesy Passmark

Specifications Full list of technical specs

summary

Atom N270  vs
E660 
Clock speed 1.6 GHz 1.3 GHz
Cores Single core Single core

features

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

power consumption

TDP 2.5W 3.6W
Annual home energy cost 0.6 $/year 0.87 $/year
Annual commercial energy cost 2.19 $/year 3.15 $/year
Performance per watt 9.71 pt/W 3.07 pt/W
Typical power consumption 2.03W 2.92W

details

Atom N270  vs
E660 
Architecture x86 x86
Threads 2 2
L2 cache 0.5 MB 0.5 MB
L2 cache per core 0.5 MB/core 0.5 MB/core
Manufacture process 45 nm 45 nm
Max CPUs 1 1
Clock multiplier 12 13
Voltage range 0.9 - 1.16V 0.75 - 0.9V

overclocking

Overclocked clock speed 1.87 GHz 1.3 GHz
Overclocked clock speed (Water) 1.6 GHz 1.3 GHz
Overclocked clock speed (Air) 1.87 GHz 1.3 GHz

integrated graphics

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

bus

Architecture FSB FSB
Number of links 1 1
Clock speed 533 MHz 2,500 MHz
Intel Atom N270
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Intel Atom E660
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