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Differences What are the advantages of each

Front view of Intel Core i3 2100

Reasons to consider the
Intel Core i3 2100

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Much higher clock speed 3.1 GHz vs 1 GHz More than 3x higher clock speed
More advanced architecture x86-64 vs x86 A 64-bit architecture allows more RAM to be installed and accessed by the processor
Much higher GPU clock speed 850 MHz vs 320 MHz Around 2.8x higher GPU clock speed
Much newer manufacturing process 32 nm vs 45 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Much better geekbench 3 single core score 2,258 vs 232 Around 9.8x better geekbench 3 single core score
Much better geekbench 3 Multi-Core score 4,786 vs 308 More than 15.5x better geekbench 3 Multi-Core score
Much better performance per dollar 1.14 pt/$ vs 0.3 pt/$ More than 3.8x better performance per dollar
Much better overclocked clock speed (Air) 3.23 GHz vs 1 GHz Around 3.2x better overclocked clock speed (Air)
Much better overclocked clock speed (Water) 3.23 GHz vs 1 GHz Around 3.2x better overclocked clock speed (Water)
More cores 2 vs 1 Twice as many cores; run more applications at once
More threads 4 vs 2 Twice as many threads
Newer Jan, 2011 vs Sep, 2010 Release date 3 months later
Front view of Intel Atom E640

Reasons to consider the
Intel Atom E640

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Much lower typical power consumption 2.92W vs 98.28W 33.6x lower typical power consumption
Much lower annual home energy cost 0.87 $/year vs 37.88 $/year 43.7x lower annual home energy cost
Much lower annual commercial energy cost 3.15 $/year vs 93.47 $/year 29.6x 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
Better performance per watt 2.4 pt/W vs 1.41 pt/W More than 70% better performance per watt

Benchmarks Real world tests of Core i3 2100 vs Atom E640

GeekBench 3 (Multi-core) Data courtesy Primate Labs

GeekBench 3 (Single core) Data courtesy Primate Labs

GeekBench 3 (AES single core) Data courtesy Primate Labs

Core i3 2100
153,100 MB/s
Atom E640
15.6 MB/s

Specifications Full list of technical specs

summary

Core i3 2100  vs
Atom E640 
Clock speed 3.1 GHz 1 GHz
Cores Dual core Single core

features

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

power consumption

TDP 65W 3.6W
Annual home energy cost 37.88 $/year 0.87 $/year
Annual commercial energy cost 93.47 $/year 3.15 $/year
Performance per watt 1.41 pt/W 2.4 pt/W
Typical power consumption 98.28W 2.92W

bus

Architecture DMI FSB
Number of links 1 1

details

Core i3 2100  vs
Atom E640 
Architecture x86-64 x86
Threads 4 2
L2 cache 0.5 MB 0.5 MB
L2 cache per core 0.25 MB/core 0.5 MB/core
Manufacture process 32 nm 45 nm
Max CPUs 1 1
Clock multiplier 31 10

overclocking

Overclocked clock speed 3.23 GHz 1 GHz
Overclocked clock speed (Water) 3.23 GHz 1 GHz
Overclocked clock speed (Air) 3.23 GHz 1 GHz

integrated graphics

GPU GPU GPU
Label Intel® HD Graphics 2000 Integrated
GPU clock speed 850 MHz 320 MHz

memory controller

Memory controller Built-in Built-in
Memory type
DDR3-1333
DDR3-1066
DDR3
DDR2-800
DDR2
Channels Dual Channel Single Channel
Maximum bandwidth 21,333.32 MB/s 6,400 MB/s
Maximum memory size 32,768 MB 2,048 MB
Intel Core i3 2100
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Intel Atom E640
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