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Differences What are the advantages of each

Front view of Intel Core i5 3570K

Reasons to consider the
Intel Core i5 3570K

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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 3.4 GHz vs 1.6 GHz More than 2x higher clock speed
Much better overclocked clock speed (Air) 4.59 GHz vs 1.6 GHz More than 2.8x better overclocked clock speed (Air)
Newer Apr, 2012 vs Jun, 2003 Release date over 8 years later
Significantly better PassMark score 7,152 vs 428 Around 16.8x better PassMark score
More cores 4 vs 1 3 more cores; run more applications at once
Significantly better performance per watt 4.69 pt/W vs 0.21 pt/W Around 22.8x better performance per watt
Much better overclocked clock speed (Water) 4.71 GHz vs 1.6 GHz Around 3x better overclocked clock speed (Water)
More threads 4 vs 1 3 more threads
Front view of AMD Opteron 142

Reasons to consider the
AMD Opteron 142

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Much lower typical power consumption 68.82W vs 107.5W More than 35% 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 20.4 $/year vs 38.81 $/year More than 45% lower annual home energy cost
Significantly lower annual commercial energy cost 74.2 $/year vs 106 $/year 30% lower annual commercial energy cost

Benchmarks Real world tests of Core i5 3570K vs Opteron 142

PassMark Data courtesy Passmark

Specifications Full list of technical specs

summary

Core i5 3570K  vs
Opteron 142 
Clock speed 3.4 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
EM64T
SSE
SSE4.1
SSE4.2
3DNow!
Supplemental SSE3
AES
Supports dynamic frequency scaling Yes Yes

details

Core i5 3570K  vs
Opteron 142 
Threads 4 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 34 8

overclocking

Overclocked clock speed 4.59 GHz 1.6 GHz
Overclocked clock speed (Water) 4.71 GHz 1.6 GHz
Overclocked clock speed (Air) 4.59 GHz 1.6 GHz

power consumption

TDP 77W 84.7W
Annual home energy cost 38.81 $/year 20.4 $/year
Annual commercial energy cost 106 $/year 74.2 $/year
Performance per watt 4.69 pt/W 0.21 pt/W
Typical power consumption 107.5W 68.82W
Intel Core i5 3570K
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AMD Opteron 142
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