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Differences What are the advantages of each

Front view of Intel Core2 Duo T6400

Reasons to consider the
Intel Core2 Duo T6400

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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
Front view of Intel Atom D2550

Reasons to consider the
Intel Atom D2550

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Has a built-in GPU Yes vs No Somewhat common; A separate graphics adapter is not required

Benchmarks Real world tests of Core2 Duo T6400 vs Atom D2550

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 T6400
84,300 MB/s
Atom D2550
29,700 MB/s

GeekBench (32-bit) Data courtesy Primate Labs

GeekBench (64-bit) Data courtesy Primate Labs

GeekBench

PassMark Data courtesy Passmark

PassMark (Single Core)

Specifications Full list of technical specs

summary

Core2 Duo T6400  vs
Atom D2550 
Clock speed 2 GHz 1.86 GHz
Cores Dual core Dual core

features

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

power consumption

TDP 35W 10W
Annual home energy cost 8.43 $/year 2.41 $/year
Performance per watt 3.9 pt/W 3.61 pt/W
Typical power consumption 28.44W 8.13W

details

Core2 Duo T6400  vs
Atom D2550 
Architecture x86-64 x86-64
Threads 2 4
L2 cache 2 MB 1 MB
L2 cache per core 1 MB/core 0.5 MB/core
Manufacture process 45 nm 32 nm
Max CPUs 1 1
Voltage range 1 - 1.25V 0.91 - 1.21V

overclocking

Overclocked clock speed 2.27 GHz 1.87 GHz
Overclocked clock speed (Water) 4.91 GHz 1.87 GHz
Overclocked clock speed (Air) 2.27 GHz 1.87 GHz

integrated graphics

GPU None GPU
Label N/A Integrated
Number of displays supported N/A 2
GPU clock speed N/A 640 MHz

bus

Architecture FSB DMI
Number of links 1 1
Intel Core2 Duo T6400
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Intel Atom D2550
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