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Differences What are the advantages of each

Front view of Intel Atom S1240

Reasons to consider the
Intel Atom S1240

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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
Has virtualization support Yes vs No Somewhat common; Boosts performance of virtual machines
Newer Dec, 2012 vs Mar, 2012 Release date 9 months later
Front view of Intel Atom D2550

Reasons to consider the
Intel Atom D2550

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Has a built-in GPU Yes vs No Somewhat common; A separate graphics adapter is not required
Higher clock speed 1.86 GHz vs 1.6 GHz More than 15% higher clock speed
Better overclocked clock speed (Air) 1.87 GHz vs 1.6 GHz More than 15% better overclocked clock speed (Air)
Better overclocked clock speed (Water) 1.87 GHz vs 1.6 GHz More than 15% better overclocked clock speed (Water)

Features Key features of the Atom S1240  vs D2550 

clock speed

Atom S1240
1.6 GHz
Atom D2550
1.86 GHz

L2 cache

overclocked clock speed (air)

Atom S1240
1.6 GHz
Atom D2550
1.87 GHz

overclocked clock speed (water)

Atom S1240
1.6 GHz
Atom D2550
1.87 GHz

TDP

Specifications Full list of technical specs

summary

Atom S1240  vs
D2550 
Clock speed 1.6 GHz 1.86 GHz
Cores Dual core Dual core

features

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

power consumption

TDP 6.1W 10W
Annual home energy cost 1.47 $/year 2.41 $/year
Annual commercial energy cost 5.34 $/year 8.76 $/year
Typical power consumption 4.96W 8.13W

bus

Architecture FSB DMI
Number of links 1 1

details

Atom S1240  vs
D2550 
Architecture x86-64 x86-64
Threads 4 4
L2 cache 1 MB 1 MB
L2 cache per core 0.5 MB/core 0.5 MB/core
Manufacture process 32 nm 32 nm
Max CPUs 1 1

overclocking

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

integrated graphics

GPU None GPU
Label N/A Integrated
Number of displays supported N/A 2
GPU clock speed N/A 640 MHz

memory controller

Memory controller Built-in Built-in
Memory type
DDR3-1333
DDR3-1066
DDR3
DDR3-800
Channels Single Channel Single Channel
Supports ECC Yes No
Maximum bandwidth 10,666.66 MB/s 8,533.33 MB/s
Maximum memory size 8,192 MB 4,096 MB
Intel Atom S1240
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Intel Atom D2550
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