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Differences What are the advantages of each

Front view of Intel Core i7 3820

Reasons to consider the
Intel Core i7 3820

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Significantly higher clock speed 3.6 GHz vs 2.8 GHz Around 30% higher clock speed
Much more l3 cache per core 2.5 MB/core vs 1 MB/core 2.5x more l3 cache per core
Front view of AMD Opteron 6286 SE

Reasons to consider the
AMD Opteron 6286 SE

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Much more l2 cache 16 MB vs 1 MB 16x more l2 cache; more data can be stored in the l2 cache for quick access later
More cores 16 vs 4 12 more cores; run more applications at once
Supports more CPUs in SMP configuration 4 vs 1 3 supports more CPUs in SMP configuration
More l3 cache 16 MB vs 10 MB 60% more l3 cache; more data can be stored in the l3 cache for quick access later
Significantly lower typical power consumption 113.75W vs 139.6W Around 20% lower typical power consumption
Much more l2 cache per core 1 MB/core vs 0.25 MB/core 4x more l2 cache per core
More threads 16 vs 8 Twice as many threads
Much lower annual home energy cost 33.73 $/year vs 49.49 $/year More than 30% lower annual home energy cost
Lower annual commercial energy cost 122.64 $/year vs 138.93 $/year More than 10% lower annual commercial energy cost

Features Key features of the Core i7 3820  vs Opteron 6286 SE 

clock speed

Core i7 3820
3.6 GHz
Opteron 6286 SE
2.8 GHz

L2 cache

L3 cache

Specifications Full list of technical specs

summary

Core i7 3820  vs
Opteron 6286 SE 
Clock speed 3.6 GHz 2.8 GHz
Cores Quad core 16 core
Socket type
LGA 2011
G34

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
Supplemental SSE3
AES

details

Core i7 3820  vs
Opteron 6286 SE 
Threads 8 16
L2 cache 1 MB 16 MB
L2 cache per core 0.25 MB/core 1 MB/core
L3 cache 10 MB 16 MB
L3 cache per core 2.5 MB/core 1 MB/core
Manufacture process 32 nm 32 nm
Max CPUs 1 4

power consumption

TDP 130W 140W
Annual home energy cost 49.49 $/year 33.73 $/year
Annual commercial energy cost 138.93 $/year 122.64 $/year
Typical power consumption 139.6W 113.75W

bus

Architecture DMI 2.0 HyperTransport 3.0
Transfer rate 5,000 MT/s 6,400 MT/s
Intel Core i7 3820
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AMD Opteron 6286 SE
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