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Differences What are the advantages of each

Front view of Intel Core i7 3960X

Reasons to consider the
Intel Core i7 3960X

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Is unlocked Yes vs No Somewhat common; An unlocked multiplier allows for easier overclocking
Much higher clock speed 3.3 GHz vs 1.6 GHz More than 2x higher clock speed
Significantly higher turbo clock speed 3.9 GHz vs 2.9 GHz Around 35% higher turbo clock speed
Much more l3 cache per core 2.5 MB/core vs 1 MB/core 2.5x more l3 cache per core
Much better overclocked clock speed (Air) 4.76 GHz vs 2.99 GHz Around 60% better overclocked clock speed (Air)
Higher Maximum operating temperature 66.8 °C vs 55 °C More than 20% higher Maximum operating temperature
Much better overclocked clock speed (Water) 4.58 GHz vs 1.6 GHz More than 2.8x better overclocked clock speed (Water)
Front view of AMD Opteron 6262 HE

Reasons to consider the
AMD Opteron 6262 HE

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Much more l2 cache 16 MB vs 2 MB 8x more l2 cache; more data can be stored in the l2 cache for quick access later
Much lower typical power consumption 69.06W vs 176.72W 2.6x lower typical power consumption
Supports more CPUs in SMP configuration 4 vs 1 3 supports more CPUs in SMP configuration
More cores 16 vs 6 10 more cores; run more applications at once
Much more l2 cache per core 1 MB/core vs 0.33 MB/core More than 3x more l2 cache per core
Much lower annual home energy cost 20.48 $/year vs 56.39 $/year 2.8x lower annual home energy cost
Much lower annual commercial energy cost 74.46 $/year vs 184.84 $/year 2.5x lower annual commercial energy cost
More threads 16 vs 12 4 more threads

Features Key features of the Core i7 3960X  vs Opteron 6262 HE 

clock speed

Core i7 3960X
3.3 GHz
Opteron 6262 HE
1.6 GHz

turbo clock speed

Core i7 3960X
3.9 GHz
Opteron 6262 HE
2.9 GHz

L2 cache

L3 cache

overclocked clock speed (air)

Core i7 3960X
4.76 GHz
Opteron 6262 HE
2.99 GHz

overclocked clock speed (water)

Core i7 3960X
4.58 GHz
Opteron 6262 HE
1.6 GHz

Specifications Full list of technical specs

summary

Core i7 3960X  vs
Opteron 6262 HE 
Clock speed 3.3 GHz 1.6 GHz
Turbo clock speed 3.9 GHz 2.9 GHz
Cores Hexa core 16 core
Socket type
LGA 2011
G34
Is unlocked Yes No

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

power consumption

TDP 130W 85W
Annual home energy cost 56.39 $/year 20.48 $/year
Annual commercial energy cost 184.84 $/year 74.46 $/year
Typical power consumption 176.72W 69.06W

memory controller

Memory controller Built-in Built-in
Memory type
DDR3-1600
DDR3-1333
DDR3-1066
DDR3

details

Core i7 3960X  vs
Opteron 6262 HE 
Threads 12 16
L2 cache 2 MB 16 MB
L2 cache per core 0.33 MB/core 1 MB/core
L3 cache 15 MB 16 MB
L3 cache per core 2.5 MB/core 1 MB/core
Manufacture process 32 nm 32 nm
Max CPUs 1 4
Clock multiplier 33 8
Operating temperature Unknown - 66.8°C Unknown - 55°C

overclocking

Overclocked clock speed 4.76 GHz 2.99 GHz
Overclocked clock speed (Water) 4.58 GHz 1.6 GHz
PassMark (Overclocked) 7,065.9 588.6
Overclocked clock speed (Air) 4.76 GHz 2.99 GHz

integrated graphics

GPU None None
Label N/A N/A
Latest DirectX N/A N/A
Number of displays supported N/A N/A
GPU clock speed N/A N/A
Turbo clock speed N/A N/A
3DMark06 N/A N/A

bus

Architecture DMI 2.0 HyperTransport 3.0
Number of links 1 4
Transfer rate 5,000 MT/s 6,400 MT/s
Intel Core i7 3960X
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AMD Opteron 6262 HE
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