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Differences What are the advantages of each

Front view of Intel Core i3 3120M

Reasons to consider the
Intel Core i3 3120M

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Much newer manufacturing process 22 nm vs 90 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Much lower typical power consumption 28.44W vs 69.06W 2.4x lower typical power consumption
Higher clock speed 2.5 GHz vs 2.2 GHz Around 15% higher clock speed
Newer Sep, 2012 vs May, 2005 Release date over 7 years later
Significantly better PassMark (Single core) score 1,313 vs 685 More than 90% better PassMark (Single core) score
Significantly higher Maximum operating temperature 90 °C vs 67 °C Around 35% higher Maximum operating temperature
Better geekbench 3 Multi-Core score 4,146 vs 2,534 Around 65% better geekbench 3 Multi-Core score
Significantly better performance per watt 3.96 pt/W vs 0.87 pt/W More than 4.5x better performance per watt
More threads 4 vs 2 Twice as many threads
Much lower annual home energy cost 8.43 $/year vs 20.48 $/year 2.4x lower annual home energy cost
Much lower annual commercial energy cost 30.66 $/year vs 74.46 $/year 2.4x lower annual commercial energy cost
Better overclocked clock speed (Air) 2.53 GHz vs 2.2 GHz More than 15% better overclocked clock speed (Air)
Better overclocked clock speed (Water) 2.5 GHz vs 2.2 GHz Around 15% better overclocked clock speed (Water)
Front view of AMD Opteron 275

Reasons to consider the
AMD Opteron 275

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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

Benchmarks Real world tests of Core i3 3120M vs Opteron 275

GeekBench 3 (Multi-core) Data courtesy Primate Labs

GeekBench 3 (Single core) Data courtesy Primate Labs

GeekBench 3 (AES single core) Data courtesy Primate Labs

Core i3 3120M
131,100 MB/s
Opteron 275
60,200 MB/s

PassMark Data courtesy Passmark

PassMark (Single Core)

Specifications Full list of technical specs

summary

Core i3 3120M  vs
Opteron 275 
Clock speed 2.5 GHz 2.2 GHz
Cores Dual core Dual core
Socket type
rPGA 988B
940

features

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

details

Core i3 3120M  vs
Opteron 275 
Threads 4 2
L2 cache 1 MB 2 MB
L2 cache per core 0.5 MB/core 1 MB/core
Manufacture process 22 nm 90 nm
Max CPUs 1 2
Clock multiplier 25 11
Operating temperature Unknown - 90°C 0 - 67°C

overclocking

Overclocked clock speed 2.53 GHz 2.2 GHz
Overclocked clock speed (Water) 2.5 GHz 2.2 GHz
PassMark (Overclocked) 1,976.5 1,303.6
Overclocked clock speed (Air) 2.53 GHz 2.2 GHz

power consumption

TDP 35W 85W
Annual home energy cost 8.43 $/year 20.48 $/year
Annual commercial energy cost 30.66 $/year 74.46 $/year
Performance per watt 3.96 pt/W 0.87 pt/W
Typical power consumption 28.44W 69.06W
Intel Core i3 3120M
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AMD Opteron 275
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