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Differences What are the advantages of each

Front view of Intel Pentium D1517

Reasons to consider the
Intel Pentium D1517

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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
Significantly newer manufacturing process 14 nm vs 22 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
More threads 8 vs 4 Twice as many threads
Newer Oct, 2015 vs Jul, 2013 Release date over 2 years later
Front view of Intel Atom C2550

Reasons to consider the
Intel Atom C2550

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Significantly higher clock speed 2.4 GHz vs 1.6 GHz Around 50% higher clock speed
Higher turbo clock speed 2.6 GHz vs 2.2 GHz Around 20% higher turbo clock speed
Significantly better overclocked clock speed (Air) 2.58 GHz vs 1.6 GHz More than 60% better overclocked clock speed (Air)
Lower typical power consumption 11.38W vs 20.31W Around 45% lower typical power consumption
Better overclocked clock speed (Water) 2.4 GHz vs 1.6 GHz Around 50% better overclocked clock speed (Water)
Lower annual home energy cost 3.37 $/year vs 6.02 $/year Around 45% lower annual home energy cost
Lower annual commercial energy cost 12.26 $/year vs 21.9 $/year Around 45% lower annual commercial energy cost

Features Key features of the Pentium D1517  vs Atom C2550 

clock speed

Pentium D1517
1.6 GHz
Atom C2550
2.4 GHz

turbo clock speed

Pentium D1517
2.2 GHz
Atom C2550
2.6 GHz

overclocked clock speed (air)

Pentium D1517
1.6 GHz
Atom C2550
2.58 GHz

overclocked clock speed (water)

Pentium D1517
1.6 GHz
Atom C2550
2.4 GHz

Specifications Full list of technical specs

summary

Pentium D1517  vs
Atom C2550 
Clock speed 1.6 GHz 2.4 GHz
Turbo clock speed 2.2 GHz 2.6 GHz
Cores Quad core Quad core

features

Has virtualization support Yes Yes
Instruction set extensions
SSE2
MMX
AVX
SSE3
EM64T
SSE
AES
AVX 2.0
Supports dynamic frequency scaling Yes No

power consumption

TDP 25W 14W
Annual home energy cost 6.02 $/year 3.37 $/year
Annual commercial energy cost 21.9 $/year 12.26 $/year
Typical power consumption 20.31W 11.38W

bus

Architecture FSB FSB
Number of links 1 1

details

Pentium D1517  vs
Atom C2550 
Architecture x86-64 x86-64
Threads 8 4
Manufacture process 14 nm 22 nm
Max CPUs 1 1

overclocking

Overclocked clock speed 1.6 GHz 2.58 GHz
Overclocked clock speed (Water) 1.6 GHz 2.4 GHz
Overclocked clock speed (Air) 1.6 GHz 2.58 GHz

integrated graphics

GPU None None
Label N/A N/A
Latest DirectX N/A N/A
Number of displays supported N/A N/A
GPU clock speed N/A N/A
Turbo clock speed N/A N/A
3DMark06 N/A N/A

memory controller

Memory controller Built-in Built-in
Memory type
DDR3
Channels Dual Channel Dual Channel
Supports ECC Yes Yes
Maximum bandwidth 12,800 MB/s 12,800 MB/s
Maximum memory size 131,072 MB 65,536 MB
Intel Pentium D1517
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Intel Atom C2550
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