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Differences What are the advantages of each

Front view of Intel Core i5 4402EC

Reasons to consider the
Intel Core i5 4402EC

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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
Newer Feb, 2014 vs Jul, 2013 Release date 7 months later
Front view of Intel Atom C2558

Reasons to consider the
Intel Atom C2558

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More cores 4 vs 2 Twice as many cores; run more applications at once
Lower typical power consumption 12.19W vs 21.94W Around 45% lower typical power consumption
Lower annual home energy cost 3.61 $/year vs 6.5 $/year Around 45% lower annual home energy cost
Lower annual commercial energy cost 13.14 $/year vs 23.65 $/year Around 45% lower annual commercial energy cost

Features Key features of the Core i5 4402EC  vs Atom C2558 

clock speed

Core i5 4402EC
2.5 GHz
Atom C2558
2.4 GHz

overclocked clock speed (air)

Core i5 4402EC
2.5 GHz
Atom C2558
2.4 GHz

overclocked clock speed (water)

Core i5 4402EC
2.5 GHz
Atom C2558
2.4 GHz

Specifications Full list of technical specs

summary

Core i5 4402EC  vs
Atom C2558 
Clock speed 2.5 GHz 2.4 GHz
Cores Dual core Quad core

features

Has a NX bit Yes Yes
Has virtualization support Yes Yes
Instruction set extensions
SSE2
MMX
SSE4
AVX
SSE3
EM64T
SSE
SSE4.1
FMA3
SSE4.2
Supplemental SSE3
AES
AVX 2.0
Supports dynamic frequency scaling Yes No

power consumption

TDP 27W 15W
Annual home energy cost 6.5 $/year 3.61 $/year
Annual commercial energy cost 23.65 $/year 13.14 $/year
Typical power consumption 21.94W 12.19W

bus

Architecture FSB FSB
Number of links 1 1

details

Core i5 4402EC  vs
Atom C2558 
Architecture x86-64 x86-64
Threads 4 4
Manufacture process 22 nm 22 nm
Max CPUs 1 1

overclocking

Overclocked clock speed 2.5 GHz 2.4 GHz
Overclocked clock speed (Water) 2.5 GHz 2.4 GHz
Overclocked clock speed (Air) 2.5 GHz 2.4 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
DDR3L-1600
DDR3L-1333
DDR3
Channels Dual Channel Dual Channel
Supports ECC Yes Yes
Maximum bandwidth 25,600 MB/s 12,800 MB/s
Intel Core i5 4402EC
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Intel Atom C2558
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