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Differences What are the advantages of each

Front view of Intel Core i7 6700K

Reasons to consider the
Intel Core i7 6700K

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Much newer manufacturing process 14 nm vs 90 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Much higher clock speed 4 GHz vs 2 GHz 2x higher clock speed
Much better PassMark score 11,109 vs 1,083 More than 10.2x better PassMark score
Much better overclocked clock speed (Air) 4.61 GHz vs 2 GHz More than 2.2x better overclocked clock speed (Air)
Newer Jul, 2015 vs May, 2005 Release date over 10 years later
More threads 8 vs 2 6 more threads
More cores 4 vs 2 Twice as many cores; run more applications at once
Significantly better performance per watt 3.49 pt/W vs 0.52 pt/W Around 6.8x better performance per watt
Much better overclocked clock speed (Water) 4.77 GHz vs 2 GHz Around 2.5x better overclocked clock speed (Water)
Front view of AMD Opteron 270

Reasons to consider the
AMD Opteron 270

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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
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
Lower typical power consumption 69.06W vs 73.94W More than 5% lower typical power consumption
Lower annual home energy cost 20.48 $/year vs 21.92 $/year More than 5% lower annual home energy cost
Lower annual commercial energy cost 74.46 $/year vs 79.72 $/year More than 5% lower annual commercial energy cost

Benchmarks Real world tests of Core i7 6700K vs Opteron 270

PassMark Data courtesy Passmark

Core i7 6700K
11,109
Opteron 270
1,083

Specifications Full list of technical specs

summary

Core i7 6700K  vs
Opteron 270 
Clock speed 4 GHz 2 GHz
Cores Quad core Dual core

features

Has a NX bit Yes Yes
Instruction set extensions
SSE2
MMX
SSE4
AVX
SSE3
SSE
SSE4.1
SSE4.2
3DNow!
Supplemental SSE3
AES
AVX 2.0
Supports dynamic frequency scaling Yes Yes

details

Core i7 6700K  vs
Opteron 270 
Threads 8 2
L2 cache 1 MB 2 MB
L2 cache per core 0.25 MB/core 1 MB/core
Manufacture process 14 nm 90 nm
Max CPUs 1 2
Operating temperature Unknown - 64°C 0 - 67°C

overclocking

Overclocked clock speed 4.61 GHz 2 GHz
Overclocked clock speed (Water) 4.77 GHz 2 GHz
Overclocked clock speed (Air) 4.61 GHz 2 GHz

power consumption

TDP 91W 85W
Annual home energy cost 21.92 $/year 20.48 $/year
Annual commercial energy cost 79.72 $/year 74.46 $/year
Performance per watt 3.49 pt/W 0.52 pt/W
Typical power consumption 73.94W 69.06W
Intel Core i7 6700K
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AMD Opteron 270
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