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Differences What are the advantages of each

Front view of Intel Atom Z520PT

Reasons to consider the
Intel Atom Z520PT

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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
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

Features Key features of the Atom Z520PT  vs D2550 

clock speed

Atom Z520PT
1.33 GHz
Atom D2550
1.86 GHz

L2 cache

Atom Z520PT
0.5 MB
Atom D2550
1 MB

overclocked clock speed (air)

Atom Z520PT
1.33 GHz
Atom D2550
1.87 GHz

overclocked clock speed (water)

Atom Z520PT
1.33 GHz
Atom D2550
1.87 GHz

TDP

Specifications Full list of technical specs

summary

Atom Z520PT  vs
D2550 
Clock speed 1.33 GHz 1.86 GHz
Cores Single 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 2.2W 10W
Annual home energy cost 0.53 $/year 2.41 $/year
Typical power consumption 1.79W 8.13W

details

Atom Z520PT  vs
D2550 
Architecture x86 x86-64
Threads 2 4
L2 cache 0.5 MB 1 MB
L2 cache per core 0.5 MB/core 0.5 MB/core
Manufacture process 45 nm 32 nm
Max CPUs 1 1
Voltage range 0.9 - 1.1V 0.91 - 1.21V

overclocking

Overclocked clock speed 1.33 GHz 1.87 GHz
Overclocked clock speed (Water) 1.33 GHz 1.87 GHz
Overclocked clock speed (Air) 1.33 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

bus

Architecture FSB DMI
Number of links 1 1
Intel Atom Z520PT
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Intel Atom D2550
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