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Differences What are the advantages of each

Front view of Intel Core i3 4005U

Reasons to consider the
Intel Core i3 4005U

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Has a built-in GPU Yes vs No Somewhat common; A separate graphics adapter is not required
Higher clock speed 1.7 GHz vs 1.25 GHz More than 35% higher clock speed
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
Better overclocked clock speed (Air) 1.81 GHz vs 1.25 GHz Around 45% better overclocked clock speed (Air)
Better overclocked clock speed (Water) 1.7 GHz vs 1.25 GHz More than 35% better overclocked clock speed (Water)
Front view of Intel Atom C2508

Reasons to consider the
Intel Atom C2508

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More cores 4 vs 2 Twice as many cores; run more applications at once
Slightly lower typical power consumption 7.72W vs 12.19W More than 35% lower typical power consumption
Newer Apr, 2014 vs Jul, 2013 Release date 9 months later
Slightly lower annual home energy cost 2.29 $/year vs 3.61 $/year More than 35% lower annual home energy cost
Slightly lower annual commercial energy cost 8.32 $/year vs 13.14 $/year More than 35% lower annual commercial energy cost

Features Key features of the Core i3 4005U  vs Atom C2508 

clock speed

Core i3 4005U
1.7 GHz
Atom C2508
1.25 GHz

overclocked clock speed (air)

Core i3 4005U
1.81 GHz
Atom C2508
1.25 GHz

overclocked clock speed (water)

Core i3 4005U
1.7 GHz
Atom C2508
1.25 GHz

TDP

Specifications Full list of technical specs

summary

Core i3 4005U  vs
Atom C2508 
Clock speed 1.7 GHz 1.25 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
SSE
SSE4.1
SSE4.2
Supplemental SSE3
AES
Supports dynamic frequency scaling Yes No

power consumption

TDP 15W 9.5W
Annual home energy cost 3.61 $/year 2.29 $/year
Annual commercial energy cost 13.14 $/year 8.32 $/year
Typical power consumption 12.19W 7.72W

bus

Architecture DMI 2.0 FSB
Number of links 1 1

details

Core i3 4005U  vs
Atom C2508 
Threads 4 4
Manufacture process 22 nm 22 nm
Max CPUs 1 1

overclocking

Overclocked clock speed 1.81 GHz 1.25 GHz
Overclocked clock speed (Water) 1.7 GHz 1.25 GHz
Overclocked clock speed (Air) 1.81 GHz 1.25 GHz

integrated graphics

GPU GPU None
Label HD 4400 series N/A
Number of displays supported 3 N/A
GPU clock speed 200 MHz N/A
Turbo clock speed 950 MHz N/A

memory controller

Memory controller Built-in Built-in
Memory type
DDR3-1333
DDR3
Channels Dual Channel Dual Channel
Supports ECC No Yes
Maximum bandwidth 12,800 MB/s 21,333.32 MB/s
Maximum memory size 16,384 MB 32,768 MB
Intel Core i3 4005U
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Intel Atom C2508
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