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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 1 MB 6x 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 better geekbench 2 (32-bit) score 2,826 vs 834 Around 3.5x better geekbench 2 (32-bit) score
Much more l2 cache per core 3 MB/core vs 0.5 MB/core 6x more l2 cache per core
Has virtualization support Yes vs No Somewhat common; Boosts performance of virtual machines
Much better overclocked clock speed (Air) 4.22 GHz vs 1.76 GHz Around 2.5x better overclocked clock speed (Air)
Much better PassMark (Single core) score 1,251 vs 231 Around 5.5x better PassMark (Single core) score
Supports trusted computing Yes vs No Somewhat common; Allows for safer, more reliable computing
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 520 Around 4.2x better PassMark score
Front view of Intel Atom N550

Reasons to consider the
Intel Atom N550

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Has a built-in GPU Yes vs No Somewhat common; A separate graphics adapter is not required
Much lower typical power consumption 6.91W vs 52.81W 7.6x lower typical power consumption
Newer Aug, 2010 vs Jan, 2008 Release date over 2 years later
Better performance per watt 3.26 pt/W vs 1.83 pt/W Around 80% better performance per watt
More threads 4 vs 2 Twice as many threads
Much lower annual home energy cost 2.05 $/year vs 15.66 $/year 7.6x lower annual home energy cost
Much lower annual commercial energy cost 7.45 $/year vs 56.94 $/year 7.6x lower annual commercial energy cost

Benchmarks Real world tests of Core2 Duo E8400 vs Atom N550

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 N550
23,350 MB/s

GeekBench (32-bit) Data courtesy Primate Labs

GeekBench

PassMark Data courtesy Passmark

PassMark (Single Core)

Specifications Full list of technical specs

summary

Core2 Duo E8400  vs
Atom N550 
Clock speed 3 GHz 1.5 GHz
Cores Dual core Dual core

features

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

power consumption

TDP 65W 8.5W
Annual home energy cost 15.66 $/year 2.05 $/year
Annual commercial energy cost 56.94 $/year 7.45 $/year
Performance per watt 1.83 pt/W 3.26 pt/W
Typical power consumption 52.81W 6.91W

details

Core2 Duo E8400  vs
Atom N550 
Architecture x86-64 x86-64
Threads 2 4
L2 cache 6 MB 1 MB
L2 cache per core 3 MB/core 0.5 MB/core
Manufacture process 45 nm 45 nm
Transistor count 410,000,000 176,000,000
Max CPUs 1 1

overclocking

Overclocked clock speed 4.22 GHz 1.76 GHz
Overclocked clock speed (Water) 4.23 GHz 1.5 GHz
Overclocked clock speed (Air) 4.22 GHz 1.76 GHz

integrated graphics

GPU None GPU
Label N/A Integrated
GPU clock speed N/A 200 MHz

bus

Architecture FSB DMI
Number of links 1 1
Intel Core2 Duo E8400
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Intel Atom N550
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