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Differences What are the advantages of each

Front view of Intel Atom N2800

Reasons to consider the
Intel Atom N2800

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Much newer manufacturing process 32 nm vs 90 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Much lower typical power consumption 5.28W vs 55.25W 10.5x lower typical power consumption
Much higher Maximum operating temperature 100 °C vs 67 °C Around 50% higher Maximum operating temperature
Newer Dec, 2011 vs May, 2005 Release date over 6 years later
Much lower annual home energy cost 1.57 $/year vs 16.38 $/year 10.5x lower annual home energy cost
Much lower annual commercial energy cost 5.69 $/year vs 59.57 $/year 10.5x lower annual commercial energy cost
More threads 4 vs 2 Twice as many threads
Front view of AMD Opteron 265

Reasons to consider the
AMD Opteron 265

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Significantly 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 more CPUs in SMP configuration 2 vs 1 Twice as many CPUs in SMP configuration
Much more l2 cache per core 1 MB/core vs 0.5 MB/core 2x more l2 cache per core
Better overclocked clock speed (Air) 2.19 GHz vs 1.87 GHz More than 15% better overclocked clock speed (Air)

Features Key features of the Atom N2800  vs Opteron 265 

clock speed

Atom N2800
1.86 GHz
Opteron 265
1.8 GHz

L2 cache

overclocked clock speed (air)

Atom N2800
1.87 GHz
Opteron 265
2.19 GHz

overclocked clock speed (water)

Atom N2800
1.87 GHz
Opteron 265
1.8 GHz

TDP

Specifications Full list of technical specs

summary

Atom N2800  vs
Opteron 265 
Clock speed 1.86 GHz 1.8 GHz
Cores Dual core Dual core

features

Has a NX bit Yes Yes
Instruction set extensions
SSE2
MMX
SSE3
SSE
3DNow!
Supplemental SSE3
AES
Supports dynamic frequency scaling Yes Yes

details

Atom N2800  vs
Opteron 265 
Threads 4 2
L2 cache 1 MB 2 MB
L2 cache per core 0.5 MB/core 1 MB/core
Manufacture process 32 nm 90 nm
Max CPUs 1 2
Operating temperature Unknown - 100°C 0 - 67°C

overclocking

Overclocked clock speed 1.87 GHz 2.19 GHz
Overclocked clock speed (Water) 1.87 GHz 1.8 GHz
Overclocked clock speed (Air) 1.87 GHz 2.19 GHz

power consumption

TDP 6.5W 68W
Annual home energy cost 1.57 $/year 16.38 $/year
Annual commercial energy cost 5.69 $/year 59.57 $/year
Typical power consumption 5.28W 55.25W
Intel Atom N2800
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AMD Opteron 265
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