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Differences What are the advantages of each

Front view of Intel Atom N450

Reasons to consider the
Intel Atom N450

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Significantly higher clock speed 1.66 GHz vs 0.6 GHz More than 2.8x higher clock speed
More advanced architecture x86-64 vs x86 A 64-bit architecture allows more RAM to be installed and accessed by the processor
Significantly better overclocked clock speed (Air) 1.9 GHz vs 0.6 GHz Around 3.2x better overclocked clock speed (Air)
Significantly better overclocked clock speed (Water) 1.67 GHz vs 0.6 GHz More than 2.8x better overclocked clock speed (Water)
Front view of Intel Atom E620T

Reasons to consider the
Intel Atom E620T

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Has virtualization support Yes vs No Somewhat common; Boosts performance of virtual machines
Newer Sep, 2010 vs Jan, 2010 Release date 8 months later

Features Key features of the Atom N450  vs E620T 

clock speed

Atom N450
1.66 GHz
Atom E620T
0.6 GHz

L2 cache

Atom N450
0.5 MB
Atom E620T
0.5 MB

overclocked clock speed (air)

Atom N450
1.9 GHz
Atom E620T
0.6 GHz

overclocked clock speed (water)

Atom N450
1.67 GHz
Atom E620T
0.6 GHz

TDP

Atom N450
5.5W
Atom E620T
3.3W

Specifications Full list of technical specs

summary

Atom N450  vs
E620T 
Clock speed 1.66 GHz 0.6 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
SSE3
SSE
Supplemental SSE3
Supports dynamic frequency scaling Yes Yes

power consumption

TDP 5.5W 3.3W
Annual home energy cost 1.32 $/year 0.79 $/year
Annual commercial energy cost 4.82 $/year 2.89 $/year
Typical power consumption 4.47W 2.68W

bus

Architecture DMI FSB
Number of links 1 1

details

Atom N450  vs
E620T 
Architecture x86-64 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 10 6
Voltage range 0.8 - 1.18V 0.75 - 0.9V

overclocking

Overclocked clock speed 1.9 GHz 0.6 GHz
Overclocked clock speed (Water) 1.67 GHz 0.6 GHz
Overclocked clock speed (Air) 1.9 GHz 0.6 GHz

integrated graphics

GPU GPU GPU
Label Integrated Integrated

memory controller

Memory controller Built-in Built-in
Memory type
DDR2-800
DDR2-667
DDR2
Channels Single Channel Single Channel
Maximum bandwidth 5,333.33 MB/s 6,400 MB/s
Maximum memory size 2,048 MB 2,048 MB
Intel Atom N450
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Intel Atom E620T
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