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Differences What are the advantages of each

Front view of Intel Core2 Duo P8400

Reasons to consider the
Intel Core2 Duo P8400

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Much more l2 cache 3 MB vs 1 MB 3x more l2 cache; more data can be stored in the l2 cache for quick access later
Higher clock speed 2.26 GHz vs 1.6 GHz More than 40% higher clock speed
Much more l2 cache per core 1.5 MB/core vs 0.5 MB/core 3x more l2 cache per core
Supports trusted computing Yes vs No Somewhat common; Allows for safer, more reliable computing
Significantly better overclocked clock speed (Air) 2.54 GHz vs 1.6 GHz Around 60% better overclocked clock speed (Air)
Better PassMark (Single core) score 902 vs 703 Around 30% better PassMark (Single core) score
Better performance per dollar 0.45 pt/$ vs 0.34 pt/$ Around 35% better performance per dollar
Better overclocked clock speed (Water) 2.26 GHz vs 1.6 GHz More than 40% better overclocked clock speed (Water)
Front view of Intel Core i3 3217UE

Reasons to consider the
Intel Core i3 3217UE

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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, 2012 vs Jul, 2008 Release date over 4 years later
Lower typical power consumption 13.81W vs 20.31W More than 30% lower typical power consumption
More threads 4 vs 2 Twice as many threads
Better performance per watt 4.92 pt/W vs 3.83 pt/W Around 30% better performance per watt
Lower annual home energy cost 4.1 $/year vs 6.02 $/year More than 30% lower annual home energy cost
Lower annual commercial energy cost 14.89 $/year vs 21.9 $/year More than 30% lower annual commercial energy cost

Benchmarks Real world tests of Core2 Duo P8400 vs Core i3 3217UE

PassMark Data courtesy Passmark

PassMark (Single Core)

Specifications Full list of technical specs

summary

Core2 Duo P8400  vs
Core i3 3217UE 
Clock speed 2.26 GHz 1.6 GHz
Cores Dual core Dual core
Socket type
479
P
BGA 1023

features

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

power consumption

TDP 25W 17W
Annual home energy cost 6.02 $/year 4.1 $/year
Annual commercial energy cost 21.9 $/year 14.89 $/year
Performance per watt 3.83 pt/W 4.92 pt/W
Typical power consumption 20.31W 13.81W

details

Core2 Duo P8400  vs
Core i3 3217UE 
Architecture x86-64 x86-64
Threads 2 4
L2 cache 3 MB 1 MB
L2 cache per core 1.5 MB/core 0.5 MB/core
Manufacture process 45 nm 22 nm
Max CPUs 1 1
Clock multiplier 8 16

overclocking

Overclocked clock speed 2.54 GHz 1.6 GHz
Overclocked clock speed (Water) 2.26 GHz 1.6 GHz
Overclocked clock speed (Air) 2.54 GHz 1.6 GHz

integrated graphics

GPU None GPU
Label N/A Intel® HD Graphics 4000
Number of displays supported N/A 3
GPU clock speed N/A 350 MHz
Turbo clock speed N/A 900 MHz

bus

Architecture FSB DMI
Number of links 1 1
Intel Core2 Duo P8400
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Intel Core i3 3217UE
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