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Differences What are the advantages of each

Front view of Intel Core i7 3770K

Reasons to consider the
Intel Core i7 3770K

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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 3.5 GHz vs 1.6 GHz Around 2.2x higher clock speed
Much better overclocked clock speed (Air) 4.69 GHz vs 1.6 GHz Around 3x better overclocked clock speed (Air)
Much better PassMark score 9,544 vs 428 More than 22.2x better PassMark score
Newer Apr, 2012 vs Sep, 2003 Release date over 8 years later
More threads 8 vs 1 7 more threads
More cores 4 vs 1 3 more cores; run more applications at once
Significantly better performance per watt 4.55 pt/W vs 0.21 pt/W Around 21.5x better performance per watt
Much better overclocked clock speed (Water) 4.8 GHz vs 1.6 GHz More than 3x better overclocked clock speed (Water)
Front view of AMD Opteron 142

Reasons to consider the
AMD Opteron 142

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Much lower typical power consumption 66.71W vs 114.97W More than 40% lower typical power consumption
Much more l2 cache per core 1 MB/core vs 0.25 MB/core 4x more l2 cache per core
Much lower annual home energy cost 19.78 $/year vs 42.19 $/year 2.1x lower annual home energy cost
Much lower annual commercial energy cost 71.92 $/year vs 112.39 $/year More than 35% lower annual commercial energy cost

Benchmarks Real world tests of Core i7 3770K vs Opteron 142

PassMark Data courtesy Passmark

Specifications Full list of technical specs

summary

Core i7 3770K  vs
Opteron 142 
Clock speed 3.5 GHz 1.6 GHz
Cores Quad 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
Supports dynamic frequency scaling Yes Yes

details

Core i7 3770K  vs
Opteron 142 
Threads 8 1
L2 cache 1 MB 1 MB
L2 cache per core 0.25 MB/core 1 MB/core
Manufacture process 22 nm 130 nm
Max CPUs 1 1
Clock multiplier 35 8
Voltage range 1.33 - 1.36V 1.3 - UnknownV

overclocking

Overclocked clock speed 4.69 GHz 1.6 GHz
Overclocked clock speed (Water) 4.8 GHz 1.6 GHz
Overclocked clock speed (Air) 4.69 GHz 1.6 GHz

power consumption

TDP 77W 82.1W
Annual home energy cost 42.19 $/year 19.78 $/year
Annual commercial energy cost 112.39 $/year 71.92 $/year
Performance per watt 4.55 pt/W 0.21 pt/W
Typical power consumption 114.97W 66.71W
Intel Core i7 3770K
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AMD Opteron 142
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