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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
Significantly higher clock speed 3 GHz vs 2 GHz 50% higher clock speed
Much more l2 cache per core 3 MB/core vs 0.5 MB/core 6x more l2 cache per core
Front view of Intel Core i3 2115C

Reasons to consider the
Intel Core i3 2115C

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Much newer manufacturing process 32 nm vs 45 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Much lower typical power consumption 20.31W vs 52.81W 2.6x lower typical power consumption
Newer Apr, 2012 vs Jan, 2008 Release date over 4 years later
More threads 4 vs 2 Twice as many threads
Much lower annual home energy cost 6.02 $/year vs 15.66 $/year 2.6x lower annual home energy cost
Much lower annual commercial energy cost 21.9 $/year vs 56.94 $/year 2.6x lower annual commercial energy cost

Features Key features of the Core2 Duo E8400  vs Core i3 2115C 

clock speed

L2 cache

Specifications Full list of technical specs

summary

Core2 Duo E8400  vs
Core i3 2115C 
Clock speed 3 GHz 2 GHz
Cores Dual core Dual core

features

Has a NX bit Yes Yes
Supports trusted computing Yes Yes
Has virtualization support Yes Yes
Instruction set extensions
SSE2
MMX
AVX
SSE3
SSE
SSE4.1
SSE4.2
Supplemental SSE3
AES
Supports dynamic frequency scaling Yes Yes

bus

Architecture FSB DMI
Number of links 1 1

details

Core2 Duo E8400  vs
Core i3 2115C 
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 32 nm
Max CPUs 1 1

integrated graphics

GPU None None
Label N/A N/A
Latest DirectX N/A N/A
Number of displays supported N/A N/A
GPU clock speed N/A N/A
Turbo clock speed N/A N/A
3DMark06 N/A N/A

power consumption

TDP 65W 25W
Annual home energy cost 15.66 $/year 6.02 $/year
Annual commercial energy cost 56.94 $/year 21.9 $/year
Typical power consumption 52.81W 20.31W
Intel Core2 Duo E8400
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Intel Core i3 2115C
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