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Differences What are the advantages of each

Front view of Intel Core i3 3220

Reasons to consider the
Intel Core i3 3220

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Much newer manufacturing process 22 nm vs 130 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Much higher clock speed 3.3 GHz vs 1.4 GHz More than 2.2x higher clock speed
Significantly lower typical power consumption 44.69W vs 66.71W Around 35% lower typical power consumption
Newer Sep, 2012 vs Jun, 2003 Release date over 9 years later
Much better overclocked clock speed (Air) 3.43 GHz vs 1.69 GHz More than 2x better overclocked clock speed (Air)
More threads 4 vs 1 3 more threads
More cores 2 vs 1 Twice as many cores; run more applications at once
Much better overclocked clock speed (Water) 3.46 GHz vs 1.4 GHz Around 2.5x better overclocked clock speed (Water)
Significantly lower annual home energy cost 13.25 $/year vs 19.78 $/year Around 35% lower annual home energy cost
Significantly lower annual commercial energy cost 48.18 $/year vs 71.92 $/year Around 35% lower annual commercial energy cost
Front view of AMD Opteron 840

Reasons to consider the
AMD Opteron 840

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Supports more CPUs in SMP configuration 8 vs 1 7 supports more CPUs in SMP configuration
More l2 cache 1 MB vs 0.5 MB 2x more l2 cache; more data can be stored in the l2 cache for quick access later
Much more l2 cache per core 1 MB/core vs 0.25 MB/core 4x more l2 cache per core

Features Key features of the Core i3 3220  vs Opteron 840 

clock speed

Core i3 3220
3.3 GHz
Opteron 840
1.4 GHz

L2 cache

overclocked clock speed (air)

Core i3 3220
3.43 GHz
Opteron 840
1.69 GHz

overclocked clock speed (water)

Core i3 3220
3.46 GHz
Opteron 840
1.4 GHz

TDP

Specifications Full list of technical specs

summary

Core i3 3220  vs
Opteron 840 
Clock speed 3.3 GHz 1.4 GHz
Cores Dual core Single 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
AES

details

Core i3 3220  vs
Opteron 840 
Threads 4 1
L2 cache 0.5 MB 1 MB
L2 cache per core 0.25 MB/core 1 MB/core
Manufacture process 22 nm 130 nm
Max CPUs 1 8
Clock multiplier 33 7

overclocking

Overclocked clock speed 3.43 GHz 1.69 GHz
Overclocked clock speed (Water) 3.46 GHz 1.4 GHz
Overclocked clock speed (Air) 3.43 GHz 1.69 GHz

power consumption

TDP 55W 82.1W
Annual home energy cost 13.25 $/year 19.78 $/year
Annual commercial energy cost 48.18 $/year 71.92 $/year
Typical power consumption 44.69W 66.71W
Intel Core i3 3220
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AMD Opteron 840
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