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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
More l3 cache 15 MB vs 8 MB Around 90% more l3 cache; more data can be stored in the l3 cache for quick access later
Much more l3 cache per core 2.5 MB/core vs 1.33 MB/core Around 90% more l3 cache per core
Significantly better overclocked clock speed (Air) 4.76 GHz vs 3.5 GHz More than 35% better overclocked clock speed (Air)
More threads 12 vs 6 Twice as many threads
Significantly better overclocked clock speed (Water) 4.58 GHz vs 3.5 GHz More than 30% better overclocked clock speed (Water)
Front view of AMD Opteron 4340

Reasons to consider the
AMD Opteron 4340

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Much more l2 cache 6 MB vs 2 MB 3x more l2 cache; more data can be stored in the l2 cache for quick access later
Much lower typical power consumption 77.19W vs 176.72W 2.3x lower typical power consumption
Higher clock speed 3.5 GHz vs 3.3 GHz More than 5% higher clock speed
Much more l2 cache per core 1 MB/core vs 0.33 MB/core More than 3x more l2 cache per core
Supports more CPUs in SMP configuration 2 vs 1 Twice as many CPUs in SMP configuration
Much lower annual home energy cost 22.89 $/year vs 56.39 $/year 2.5x lower annual home energy cost
Much lower annual commercial energy cost 83.22 $/year vs 184.84 $/year 2.2x lower annual commercial energy cost
Newer Dec, 2012 vs Nov, 2011 Release date over 1 years later

Features Key features of the Core i7 3960X  vs Opteron 4340 

clock speed

Core i7 3960X
3.3 GHz
Opteron 4340
3.5 GHz

turbo clock speed

Core i7 3960X
3.9 GHz
Opteron 4340
3.8 GHz

L2 cache

L3 cache

overclocked clock speed (air)

Core i7 3960X
4.76 GHz
Opteron 4340
3.5 GHz

overclocked clock speed (water)

Core i7 3960X
4.58 GHz
Opteron 4340
3.5 GHz

Specifications Full list of technical specs

summary

Core i7 3960X  vs
Opteron 4340 
Clock speed 3.3 GHz 3.5 GHz
Turbo clock speed 3.9 GHz 3.8 GHz
Cores Hexa core Hexa core
Socket type
LGA 2011
C32
Is unlocked Yes No

features

Has a NX bit Yes Yes
Has virtualization support Yes Yes
Instruction set extensions
SSE4a
AVX 1.1
SSE2
F16C
MMX
SSE4
XOP
AVX
SSE3
SSE
CLMUL
AMD64
SSE4.1
FMA4
FMA3
SSE4.2
CVT16
AMD-V
Supplemental SSE3
AES
Supports dynamic frequency scaling Yes Yes

power consumption

TDP 130W 95W
Annual home energy cost 56.39 $/year 22.89 $/year
Annual commercial energy cost 184.84 $/year 83.22 $/year
Typical power consumption 176.72W 77.19W

memory controller

Memory controller Built-in Built-in
Memory type
DDR3-1600
DDR3-1333
DDR3-1066
DDR3
Channels Quad Channel Dual Channel
Supports ECC No Yes
Maximum bandwidth 51,200 MB/s 12,800 MB/s

details

Core i7 3960X  vs
Opteron 4340 
Threads 12 6
L2 cache 2 MB 6 MB
L2 cache per core 0.33 MB/core 1 MB/core
L3 cache 15 MB 8 MB
L3 cache per core 2.5 MB/core 1.33 MB/core
Manufacture process 32 nm 32 nm
Max CPUs 1 2
Clock multiplier 33 17
Operating temperature Unknown - 66.8°C Unknown - 67.7°C

overclocking

Overclock popularity 156 0
Overclocked clock speed 4.76 GHz 3.5 GHz
Overclocked clock speed (Water) 4.58 GHz 3.5 GHz
Overclocked clock speed (Air) 4.76 GHz 3.5 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
Transfer rate 5,000 MT/s 6,400 MT/s
Intel Core i7 3960X
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AMD Opteron 4340
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