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Differences What are the advantages of each

Front view of Intel Core2 Duo E8400

Reasons to consider the
Intel Core2 Duo E8400

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Much more l2 cache 6 MB vs 2 MB 3x more l2 cache; more data can be stored in the l2 cache for quick access later
Much higher clock speed 3 GHz vs 1.5 GHz 2x higher clock speed
Much more l2 cache per core 3 MB/core vs 0.5 MB/core 6x more l2 cache per core
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
Much better overclocked clock speed (Air) 4.22 GHz vs 1.5 GHz More than 2.8x better overclocked clock speed (Air)
Significantly better PassMark (Single core) score 1,251 vs 300 Around 4.2x better PassMark (Single core) score
Much better overclocked clock speed (Water) 4.23 GHz vs 1.5 GHz More than 2.8x better overclocked clock speed (Water)
Better PassMark score 2,160 vs 805 Around 2.8x better PassMark score
Front view of Intel Atom Z3770D

Reasons to consider the
Intel Atom Z3770D

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Much better performance per dollar 4.76 pt/$ vs 0.67 pt/$ Around 7.2x better performance per dollar
Much newer manufacturing process 22 nm vs 45 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Has a built-in GPU Yes vs No Somewhat common; A separate graphics adapter is not required
Newer Jul, 2013 vs Jan, 2008 Release date over 5 years later
More cores 4 vs 2 Twice as many cores; run more applications at once
More threads 4 vs 2 Twice as many threads

Benchmarks Real world tests of Core2 Duo E8400 vs Atom Z3770D

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

Core2 Duo E8400
128,000 MB/s
Atom Z3770D
392,850 MB/s

PassMark Data courtesy Passmark

PassMark (Single Core)

Specifications Full list of technical specs

summary

Core2 Duo E8400  vs
Atom Z3770D 
Clock speed 3 GHz 1.5 GHz
Cores Dual core Quad core

features

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

power consumption

Typical power consumption 52.81W N/A

details

Core2 Duo E8400  vs
Atom Z3770D 
Architecture x86-64 x86-64
Threads 2 4
L2 cache 6 MB 2 MB
L2 cache per core 3 MB/core 0.5 MB/core
Manufacture process 45 nm 22 nm
Max CPUs 1 1

overclocking

Overclocked clock speed 4.22 GHz 1.5 GHz
Overclocked clock speed (Water) 4.23 GHz 1.5 GHz
Overclocked clock speed (Air) 4.22 GHz 1.5 GHz

integrated graphics

GPU None GPU
Label N/A Intel® HD Graphics
GPU clock speed N/A 313 MHz

bus

Architecture FSB FSB
Number of links 1 1
Intel Core2 Duo E8400
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Intel Atom Z3770D
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