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Differences What are the advantages of each

Front view of Intel Atom E640

Reasons to consider the
Intel Atom E640

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CPUBoss is not aware of any important advantages of the E640 vs the E620.

Front view of Intel Atom E620

Reasons to consider the
Intel Atom E620

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CPUBoss is not aware of any important advantages of the E620 vs the E640.

Features Key features of the Atom E640  vs E620 

clock speed

Atom E640
1 GHz
Atom E620
0.6 GHz

L2 cache

Atom E640
0.5 MB
Atom E620
0.5 MB

gpu clock speed

Atom E640
320 MHz
Atom E620
320 MHz

overclocked clock speed (air)

Atom E640
1 GHz
Atom E620
0.6 GHz

overclocked clock speed (water)

Atom E640
1 GHz
Atom E620
0.6 GHz

TDP

Atom E640
3.6W
Atom E620
3.3W

Specifications Full list of technical specs

summary

Atom E640  vs
E620 
Clock speed 1 GHz 0.6 GHz
Cores Single core Single core

features

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

power consumption

TDP 3.6W 3.3W
Typical power consumption 2.92W 2.68W

bus

Architecture FSB FSB
Number of links 1 1
Clock speed 2,500 MHz 2,500 MHz

details

Atom E640  vs
E620 
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 0.75 - 0.9V 0.75 - 0.9V
Architecture x86 x86

overclocking

Overclocked clock speed 1 GHz 0.6 GHz
Overclocked clock speed (Water) 1 GHz 0.6 GHz
Overclocked clock speed (Air) 1 GHz 0.6 GHz

integrated graphics

GPU GPU GPU
Label Integrated Integrated
GPU clock speed 320 MHz 320 MHz

memory controller

Memory controller Built-in Built-in
Memory type
DDR2-800
DDR2
Channels Single Channel Single Channel
Supports ECC No No
Maximum bandwidth 6,400 MB/s 6,400 MB/s
Maximum memory size 2,048 MB 2,048 MB
Intel Atom E640
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Intel Atom E620
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