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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 higher clock speed 3 GHz vs 2.7 GHz More than 10% higher clock speed
Much better overclocked clock speed (Air) 4.22 GHz vs 2.7 GHz More than 55% better overclocked clock speed (Air)
Supports trusted computing Yes vs No Somewhat common; Allows for safer, more reliable computing
Much better overclocked clock speed (Water) 4.23 GHz vs 2.7 GHz More than 55% better overclocked clock speed (Water)
Front view of Intel Celeron G555

Reasons to consider the
Intel Celeron G555

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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 E8400 vs Celeron G555

PassMark Data courtesy Passmark

PassMark (Single Core)

Specifications Full list of technical specs

summary

Core2 Duo E8400  vs
Celeron G555 
Clock speed 3 GHz 2.7 GHz
Cores Dual core Dual core
Socket type
LGA 775
LGA 1155

features

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

power consumption

TDP 65W 65W
Annual home energy cost 15.66 $/year 15.66 $/year
Annual commercial energy cost 56.94 $/year 56.94 $/year
Performance per watt 1.83 pt/W 1.96 pt/W
Typical power consumption 52.81W 52.81W

details

Core2 Duo E8400  vs
Celeron G555 
Architecture x86-64 x86-64
Threads 2 2
L2 cache 6 MB 1 MB
L2 cache per core 3 MB/core 0.5 MB/core
Manufacture process 45 nm 32 nm
Max CPUs 1 1
Clock multiplier 9 27
Operating temperature Unknown - 72.4°C Unknown - 69.1°C

overclocking

Overclocked clock speed 4.22 GHz 2.7 GHz
Overclocked clock speed (Water) 4.23 GHz 2.7 GHz
Overclocked clock speed (Air) 4.22 GHz 2.7 GHz

integrated graphics

GPU None GPU
Label N/A Intel® HD Graphics
Number of displays supported N/A 2
GPU clock speed N/A 850 MHz
Turbo clock speed N/A 1,000 MHz

bus

Architecture FSB DMI
Number of links 1 1
Intel Core2 Duo E8400
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Intel Celeron G555
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