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Differences What are the advantages of each

Front view of Intel Core i5 3570

Reasons to consider the
Intel Core i5 3570

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Much higher clock speed 3.4 GHz vs 1 GHz Around 3.5x higher clock speed
Much newer manufacturing process 22 nm vs 45 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
More advanced architecture x86-64 vs x86 A 64-bit architecture allows more RAM to be installed and accessed by the processor
More l2 cache 1 MB vs 0.5 MB 2x more l2 cache; more data can be stored in the l2 cache for quick access later
Much higher GPU clock speed 650 MHz vs 320 MHz More than 2x higher GPU clock speed
Has a NX bit Yes vs No Somewhat common; Prevents a common class of security exploits
Much better overclocked clock speed (Air) 4.02 GHz vs 1 GHz More than 4x better overclocked clock speed (Air)
More cores 4 vs 1 3 more cores; run more applications at once
Much better overclocked clock speed (Water) 4.22 GHz vs 1 GHz Around 4.2x better overclocked clock speed (Water)
More threads 4 vs 2 Twice as many threads
Newer Jun, 2012 vs Nov, 2010 Release date over 1 years later
Front view of Intel Atom E645CT

Reasons to consider the
Intel Atom E645CT

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Much lower typical power consumption 5.69W vs 107.5W 18.9x lower typical power consumption
Much lower annual home energy cost 1.69 $/year vs 38.81 $/year 23x lower annual home energy cost
Much lower annual commercial energy cost 6.13 $/year vs 106 $/year 17.3x lower annual commercial energy cost
More l2 cache per core 0.5 MB/core vs 0.25 MB/core 2x more l2 cache per core

Features Key features of the Core i5 3570  vs Atom E645CT 

clock speed

Core i5 3570
3.4 GHz
Atom E645CT
1 GHz

L2 cache

gpu clock speed

Core i5 3570
650 MHz
Atom E645CT
320 MHz

overclocked clock speed (air)

Core i5 3570
4.02 GHz
Atom E645CT
1 GHz

overclocked clock speed (water)

Core i5 3570
4.22 GHz
Atom E645CT
1 GHz

Specifications Full list of technical specs

summary

Core i5 3570  vs
Atom E645CT 
Clock speed 3.4 GHz 1 GHz
Cores Quad core Single core

features

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

power consumption

TDP 77W 7W
Annual home energy cost 38.81 $/year 1.69 $/year
Annual commercial energy cost 106 $/year 6.13 $/year
Typical power consumption 107.5W 5.69W

bus

Architecture DMI FSB
Number of links 1 1
Transfer rate 5,000 MT/s 2,500 MT/s

details

Core i5 3570  vs
Atom E645CT 
Architecture x86-64 x86
Threads 4 2
L2 cache 1 MB 0.5 MB
L2 cache per core 0.25 MB/core 0.5 MB/core
Manufacture process 22 nm 45 nm
Max CPUs 1 1

overclocking

Overclocked clock speed 4.02 GHz 1 GHz
Overclocked clock speed (Water) 4.22 GHz 1 GHz
Overclocked clock speed (Air) 4.02 GHz 1 GHz

integrated graphics

GPU GPU GPU
Label Intel® HD Graphics 2500 Integrated
GPU clock speed 650 MHz 320 MHz

memory controller

Memory controller Built-in Built-in
Memory type
DDR3-1600
DDR3-1333
DDR3
DDR2-800
DDR2
Channels Dual Channel Single Channel
Supports ECC No No
Maximum bandwidth 25,600 MB/s 6,400 MB/s
Maximum memory size 32,768 MB 3,000.32 MB
Intel Core i5 3570
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Intel Atom E645CT
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