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Differences What are the advantages of each

Front view of Intel Core i7 3930K

Reasons to consider the
Intel Core i7 3930K

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Significantly higher clock speed 3.2 GHz vs 2.3 GHz Around 40% higher clock speed
Much newer manufacturing process 32 nm vs 45 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Much better overclocked clock speed (Air) 4.67 GHz vs 2.3 GHz More than 2x better overclocked clock speed (Air)
More threads 12 vs 8 4 more threads
More l3 cache per core 2 MB/core vs 1.5 MB/core Around 35% more l3 cache per core
Much better overclocked clock speed (Water) 4.67 GHz vs 2.3 GHz More than 2x better overclocked clock speed (Water)
Newer Nov, 2011 vs Mar, 2010 Release date over 1 years later
Front view of AMD Opteron 61QS

Reasons to consider the
AMD Opteron 61QS

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Much more l2 cache 4 MB vs 2 MB 2x more l2 cache; more data can be stored in the l2 cache for quick access later
Much lower typical power consumption 93.44W vs 172.6W More than 45% lower typical power consumption
Supports more CPUs in SMP configuration 4 vs 1 3 supports more CPUs in SMP configuration
More cores 8 vs 6 2 more cores; run more applications at once
Much lower annual home energy cost 27.7 $/year vs 56.96 $/year 2.1x lower annual home energy cost
Much lower annual commercial energy cost 100.74 $/year vs 177.83 $/year Around 45% lower annual commercial energy cost
More l2 cache per core 0.5 MB/core vs 0.33 MB/core More than 50% more l2 cache per core

Features Key features of the Core i7 3930K  vs Opteron 61QS 

clock speed

Core i7 3930K
3.2 GHz
Opteron 61QS
2.3 GHz

L2 cache

L3 cache

overclocked clock speed (air)

Core i7 3930K
4.67 GHz
Opteron 61QS
2.3 GHz

overclocked clock speed (water)

Core i7 3930K
4.67 GHz
Opteron 61QS
2.3 GHz

TDP

Specifications Full list of technical specs

summary

Core i7 3930K  vs
Opteron 61QS 
Clock speed 3.2 GHz 2.3 GHz
Cores Hexa core Octa 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
3DNow!
Supplemental SSE3
AES

bus

Architecture DMI 2.0 HyperTransport 3.0

details

Core i7 3930K  vs
Opteron 61QS 
Threads 12 8
L2 cache 2 MB 4 MB
L2 cache per core 0.33 MB/core 0.5 MB/core
L3 cache 12 MB 12 MB
L3 cache per core 2 MB/core 1.5 MB/core
Manufacture process 32 nm 45 nm
Max CPUs 1 4
Clock multiplier 32 11
Voltage range 0.6 - 1.35V 1 - UnknownV

overclocking

Overclocked clock speed 4.67 GHz 2.3 GHz
Overclocked clock speed (Water) 4.67 GHz 2.3 GHz
Overclocked clock speed (Air) 4.67 GHz 2.3 GHz

power consumption

TDP 130W 115W
Annual home energy cost 56.96 $/year 27.7 $/year
Annual commercial energy cost 177.83 $/year 100.74 $/year
Typical power consumption 172.6W 93.44W
Intel Core i7 3930K
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AMD Opteron 61QS
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