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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 per core 3 MB/core vs 1 MB/core 3x more l2 cache per core
Much lower typical power consumption 52.81W vs 113.75W 2.2x lower typical power consumption
Higher clock speed 3 GHz vs 2.8 GHz More than 5% higher clock speed
Much lower annual home energy cost 15.66 $/year vs 33.73 $/year 2.2x lower annual home energy cost
Much lower annual commercial energy cost 56.94 $/year vs 122.64 $/year 2.2x lower annual commercial energy cost
Front view of AMD Opteron 6286 SE

Reasons to consider the
AMD Opteron 6286 SE

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Much more l2 cache 16 MB vs 6 MB Around 2.8x more l2 cache; more data can be stored in the l2 cache for quick access later
More cores 16 vs 2 14 more cores; run more applications at once
Much newer manufacturing process 32 nm vs 45 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Supports more CPUs in SMP configuration 4 vs 1 3 supports more CPUs in SMP configuration
More threads 16 vs 2 14 more threads

Features Key features of the Core2 Duo E8400  vs Opteron 6286 SE 

clock speed

L2 cache

Specifications Full list of technical specs

summary

Core2 Duo E8400  vs
Opteron 6286 SE 
Clock speed 3 GHz 2.8 GHz
Cores Dual core 16 core
Socket type
LGA 775
G34

features

Has a NX bit Yes Yes
Has virtualization support Yes Yes
Instruction set extensions
SSE4a
SSE2
MMX
SSE4
SSE3
SSE
SSE4.1
Supplemental SSE3
AES

details

Core2 Duo E8400  vs
Opteron 6286 SE 
Threads 2 16
L2 cache 6 MB 16 MB
L2 cache per core 3 MB/core 1 MB/core
Manufacture process 45 nm 32 nm
Max CPUs 1 4

power consumption

TDP 65W 140W
Annual home energy cost 15.66 $/year 33.73 $/year
Annual commercial energy cost 56.94 $/year 122.64 $/year
Typical power consumption 52.81W 113.75W

bus

Architecture FSB HyperTransport 3.0
Clock speed 1,333 MHz 3,200 MHz
Intel Core2 Duo E8400
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AMD Opteron 6286 SE
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