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Differences What are the advantages of each

Front view of Intel Core i3 2100

Reasons to consider the
Intel Core i3 2100

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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
Significantly higher clock speed 3.1 GHz vs 2 GHz More than 55% higher clock speed
Significantly better overclocked clock speed (Air) 3.23 GHz vs 2 GHz More than 60% better overclocked clock speed (Air)
Newer Jan, 2011 vs May, 2005 Release date over 5 years later
Better PassMark score 3,664 vs 1,083 Around 3.5x better PassMark score
More threads 4 vs 2 Twice as many threads
Better performance per watt 1.41 pt/W vs 0.52 pt/W Around 2.8x better performance per watt
Significantly better overclocked clock speed (Water) 3.23 GHz vs 2 GHz More than 60% better overclocked clock speed (Water)
Front view of AMD Opteron 270

Reasons to consider the
AMD Opteron 270

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Much more l2 cache 2 MB vs 0.5 MB 4x more l2 cache; more data can be stored in the l2 cache for quick access later
Significantly lower typical power consumption 69.06W vs 98.28W Around 30% lower typical power consumption
Much more l2 cache per core 1 MB/core vs 0.25 MB/core 4x more l2 cache per core
Supports more CPUs in SMP configuration 2 vs 1 Twice as many CPUs in SMP configuration
Much lower annual home energy cost 20.48 $/year vs 37.88 $/year More than 45% lower annual home energy cost
Lower annual commercial energy cost 74.46 $/year vs 93.47 $/year More than 20% lower annual commercial energy cost

Benchmarks Real world tests of Core i3 2100 vs Opteron 270

PassMark Data courtesy Passmark

Specifications Full list of technical specs

summary

Core i3 2100  vs
Opteron 270 
Clock speed 3.1 GHz 2 GHz
Cores Dual core Dual core
Socket type
LGA 1155
940

features

Has a NX bit Yes Yes
Instruction set extensions
SSE2
MMX
SSE4
AVX
SSE3
SSE
SSE4.1
SSE4.2
3DNow!
Supplemental SSE3
Supports dynamic frequency scaling Yes Yes

details

Core i3 2100  vs
Opteron 270 
Threads 4 2
L2 cache 0.5 MB 2 MB
L2 cache per core 0.25 MB/core 1 MB/core
Manufacture process 32 nm 90 nm
Max CPUs 1 2
Clock multiplier 31 10
Operating temperature Unknown - 69.1°C 0 - 67°C

overclocking

Overclocked clock speed 3.23 GHz 2 GHz
Overclocked clock speed (Water) 3.23 GHz 2 GHz
PassMark (Overclocked) 1,518.9 1,113.5
Overclocked clock speed (Air) 3.23 GHz 2 GHz

power consumption

TDP 65W 85W
Annual home energy cost 37.88 $/year 20.48 $/year
Annual commercial energy cost 93.47 $/year 74.46 $/year
Performance per watt 1.41 pt/W 0.52 pt/W
Typical power consumption 98.28W 69.06W
Intel Core i3 2100
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AMD Opteron 270
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