CPUBoss Review Our evaluation of T6400 vs D2550

Performance

Benchmark performance using all cores

Passmark, GeekBench (32-bit) and GeekBench (64-bit)

Single-core Performance

Individual core benchmark performance

Passmark (Single Core)

Power Consumption

How much power does the processor require?

TDP

Features

How does CPUBoss rank the features of each product?

Features and specifications that differ between products

CPUBoss Score

Performance, Single-core Performance, Power Consumption and Features

Winner
Intel Core2 Duo T6400 

CPUBoss recommends the Intel Core2 Duo T6400  based on its .

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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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More l2 cache 2 MB vs 1 MB 2x more l2 cache; more data can be stored in the l2 cache for quick access later
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 more l2 cache per core 1 MB/core vs 0.5 MB/core 2x more l2 cache per core
Slightly higher clock speed 2 GHz vs 1.86 GHz Around 10% higher clock speed
Much better performance per dollar 6.33 pt/$ vs 2.16 pt/$ Around 3x better performance per dollar
Better PassMark (Single core) score 777 vs 295 Around 2.8x better PassMark (Single core) score
Better overclocked clock speed (Air) 2.2 GHz vs 1.87 GHz Around 20% better overclocked clock speed (Air)
Better overclocked clock speed (Water) 2.2 GHz vs 1.87 GHz Around 20% better overclocked clock speed (Water)
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
Much newer manufacturing process 32 nm vs 45 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Is hyperthreaded Yes vs No Somewhat common; Maximizes usage of each CPU core
Significantly lower typical power consumption 8.13W vs 28.44W 3.5x lower typical power consumption
More threads 4 vs 2 Twice as many threads
Newer Mar, 2012 vs Jan, 2009 Release date over 3 years later
Significantly lower annual home energy cost 2.41 $/year vs 8.43 $/year 3.5x lower annual home energy cost

Benchmarks Real world tests of Core2 Duo T6400 vs Atom D2550

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
Is hyperthreaded No Yes

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 6.84 pt/W 10.17 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 2.2 GHz 1.87 GHz
Overclocked clock speed (Water) 2.2 GHz 1.87 GHz
Overclocked clock speed (Air) 2.2 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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