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Differences What are the advantages of each

Front view of Intel Core i7 5820K

Reasons to consider the
Intel Core i7 5820K

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Significantly higher clock speed 3.3 GHz vs 2.3 GHz Around 45% higher clock speed
Much newer manufacturing process 22 nm vs 45 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Significantly more l3 cache 15 MB vs 6 MB 2.5x more l3 cache; more data can be stored in the l3 cache for quick access later
More threads 12 vs 4 Three times as many threads
Significantly more l3 cache per core 2.5 MB/core vs 1.5 MB/core More than 65% more l3 cache per core
More cores 6 vs 4 2 more cores; run more applications at once
Front view of AMD Third Generation Opteron 8300

Reasons to consider the
AMD Third Generation Opteron 8300

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Supports more CPUs in SMP configuration 8 vs 1 7 supports more CPUs in SMP configuration

Features Key features of the Core i7 5820K  vs Third Generation Opteron 8300 

Specifications Full list of technical specs

summary

Core i7 5820K  vs
Third Generation Opteron 8300 
Clock speed 3.3 GHz 2.3 GHz
Cores Hexa core Quad core

features

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

details

Core i7 5820K  vs
Third Generation Opteron 8300 
Threads 12 4
L3 cache 15 MB 6 MB
L3 cache per core 2.5 MB/core 1.5 MB/core
Manufacture process 22 nm 45 nm
Max CPUs 1 8

power consumption

Typical power consumption 113.75W N/A
Intel Core i7 5820K
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AMD Third Generation Opteron 8300
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