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Differences What are the advantages of each

Front view of Intel Core i7 4790K

Reasons to consider the
Intel Core i7 4790K

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Much higher clock speed 4 GHz vs 1.6 GHz Around 2.5x 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 per core 2 MB/core vs 1.25 MB/core 60% more l3 cache per core
Front view of AMD Opteron 61-1

Reasons to consider the
AMD Opteron 61-1

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Much more l2 cache 4 MB vs 1 MB 4x more l2 cache; more data can be stored in the l2 cache for quick access later
Supports more CPUs in SMP configuration 4 vs 1 3 supports more CPUs in SMP configuration
More cores 8 vs 4 Twice as many cores; run more applications at once
Slightly more l3 cache 10 MB vs 8 MB 25% more l3 cache; more data can be stored in the l3 cache for quick access later
More l2 cache per core 0.5 MB/core vs 0.25 MB/core 2x more l2 cache per core

Features Key features of the Core i7 4790K  vs Opteron 61-1 

clock speed

Opteron 61-1
1.6 GHz

L2 cache

L3 cache

Specifications Full list of technical specs

summary

Core i7 4790K  vs
Opteron 61-1 
Clock speed 4 GHz 1.6 GHz
Cores Quad core Octa core

features

Has a NX bit Yes Yes
Has virtualization support Yes Yes
Instruction set extensions
SSE4a
SSE2
F16C
MMX
SSE4
AVX
SSE3
EM64T
SSE
SSE4.1
FMA3
SSE4.2
3DNow!
AES
AVX 2.0

details

Core i7 4790K  vs
Opteron 61-1 
Threads 8 8
L2 cache 1 MB 4 MB
L2 cache per core 0.25 MB/core 0.5 MB/core
L3 cache 8 MB 10 MB
L3 cache per core 2 MB/core 1.25 MB/core
Manufacture process 22 nm 45 nm
Max CPUs 1 4

power consumption

Typical power consumption 71.5W N/A

bus

Architecture DMI 2.0 HyperTransport 3.0
Intel Core i7 4790K
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AMD Opteron 61-1
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