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Differences What are the advantages of each

Front view of Intel Atom E620

Reasons to consider the
Intel Atom E620

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Much lower typical power consumption 2.68W vs 159W 59.3x lower typical power consumption
Has a built-in GPU Yes vs No Somewhat common; A separate graphics adapter is not required
Much lower annual home energy cost 0.79 $/year vs 59.83 $/year 75.3x lower annual home energy cost
Much lower annual commercial energy cost 2.89 $/year vs 153.3 $/year 53x lower annual commercial energy cost
Newer Sep, 2010 vs Sep, 2009 Release date a year later
Front view of AMD Athlon II X4 620

Reasons to consider the
AMD Athlon II X4 620

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Much higher clock speed 2.6 GHz vs 0.6 GHz More than 4.2x higher clock speed
Much more l2 cache 2 MB vs 0.5 MB 4x more l2 cache; more data can be stored in the l2 cache for quick access later
More advanced architecture x86-64 vs x86 A 64-bit architecture allows more RAM to be installed and accessed by the processor
Much better overclocked clock speed (Air) 3.5 GHz vs 0.6 GHz More than 5.8x better overclocked clock speed (Air)
More cores 4 vs 1 3 more cores; run more applications at once
More threads 4 vs 2 Twice as many threads
Much better overclocked clock speed (Water) 2.6 GHz vs 0.6 GHz More than 4.2x better overclocked clock speed (Water)

Features Key features of the Atom E620  vs Athlon II X4 620 

clock speed

Atom E620
0.6 GHz

L2 cache

overclocked clock speed (air)

Atom E620
0.6 GHz

overclocked clock speed (water)

Atom E620
0.6 GHz

Specifications Full list of technical specs

summary

Atom E620  vs
Athlon II X4 620 
Clock speed 0.6 GHz 2.6 GHz
Cores Single core Quad core

features

Has a NX bit Yes Yes
Has virtualization support Yes Yes
Instruction set extensions
SSE4a
SSE2
MMX
SSE3
SSE
3DNow!
Supplemental SSE3
Supports dynamic frequency scaling Yes Yes

power consumption

TDP 3.3W 95W
Annual home energy cost 0.79 $/year 59.83 $/year
Annual commercial energy cost 2.89 $/year 153.3 $/year
Typical power consumption 2.68W 159W

details

Atom E620  vs
Athlon II X4 620 
Architecture x86 x86-64
Threads 2 4
L2 cache 0.5 MB 2 MB
L2 cache per core 0.5 MB/core 0.5 MB/core
Manufacture process 45 nm 45 nm
Max CPUs 1 1
Voltage range 0.75 - 0.9V 0.93 - 1.43V

overclocking

Overclocked clock speed 0.6 GHz 3.5 GHz
Overclocked clock speed (Water) 0.6 GHz 2.6 GHz
Overclocked clock speed (Air) 0.6 GHz 3.5 GHz

integrated graphics

GPU GPU None
Label Integrated N/A
GPU clock speed 320 MHz N/A

bus

Clock speed 2,500 MHz 2,000 MHz
Intel Atom E620
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AMD Athlon II X4 620
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