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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 higher clock speed 4 GHz vs 2.2 GHz More than 80% higher clock speed
Much newer manufacturing process 14 nm vs 45 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Much better overclocked clock speed (Air) 4.61 GHz vs 2.2 GHz More than 2x better overclocked clock speed (Air)
Significantly more l3 cache per core 2 MB/core vs 1 MB/core 2x more l3 cache per core
Slightly more l3 cache 8 MB vs 6 MB Around 35% more l3 cache; more data can be stored in the l3 cache for quick access later
Newer Jul, 2015 vs Jun, 2010 Release date over 5 years later
Much better overclocked clock speed (Water) 4.77 GHz vs 2.2 GHz Around 2.2x better overclocked clock speed (Water)
More threads 8 vs 6 2 more threads
Front view of AMD Opteron 41KX HE

Reasons to consider the
AMD Opteron 41KX HE

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Much more l2 cache 3 MB vs 1 MB 3x more l2 cache; more data can be stored in the l2 cache for quick access later
Significantly lower typical power consumption 52.81W vs 73.94W Around 30% lower typical power consumption
Supports more CPUs in SMP configuration 2 vs 1 Twice as many CPUs in SMP configuration
More cores 6 vs 4 2 more cores; run more applications at once
More l2 cache per core 0.5 MB/core vs 0.25 MB/core 2x more l2 cache per core
Significantly lower annual home energy cost 15.66 $/year vs 21.92 $/year Around 30% lower annual home energy cost
Significantly lower annual commercial energy cost 56.94 $/year vs 79.72 $/year Around 30% lower annual commercial energy cost

Features Key features of the Core i7 6700K  vs Opteron 41KX HE 

clock speed

L2 cache

L3 cache

overclocked clock speed (air)

Core i7 6700K
4.61 GHz
Opteron 41KX HE
2.2 GHz

overclocked clock speed (water)

Core i7 6700K
4.77 GHz
Opteron 41KX HE
2.2 GHz

Specifications Full list of technical specs

summary

Core i7 6700K  vs
Opteron 41KX HE 
Clock speed 4 GHz 2.2 GHz
Cores Quad core Hexa core

features

Has a NX bit Yes Yes
Has virtualization support Yes Yes
Instruction set extensions
SSE4a
SSE2
MMX
SSE4
AVX
SSE3
SSE
SSE4.1
SSE4.2
3DNow!
Supplemental SSE3
AES
AVX 2.0

bus

Architecture FSB HyperTransport 3.0

details

Core i7 6700K  vs
Opteron 41KX HE 
Threads 8 6
L2 cache 1 MB 3 MB
L2 cache per core 0.25 MB/core 0.5 MB/core
L3 cache 8 MB 6 MB
L3 cache per core 2 MB/core 1 MB/core
Manufacture process 14 nm 45 nm
Max CPUs 1 2

overclocking

Overclocked clock speed 4.61 GHz 2.2 GHz
Overclocked clock speed (Water) 4.77 GHz 2.2 GHz
Overclocked clock speed (Air) 4.61 GHz 2.2 GHz

power consumption

TDP 91W 65W
Annual home energy cost 21.92 $/year 15.66 $/year
Annual commercial energy cost 79.72 $/year 56.94 $/year
Typical power consumption 73.94W 52.81W
Intel Core i7 6700K
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AMD Opteron 41KX HE
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