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Differences What are the advantages of each

Front view of AMD Phenom II X4 955

Reasons to consider the
AMD Phenom II X4 955

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Is unlocked Yes vs No Somewhat common; An unlocked multiplier allows for easier overclocking
Significantly higher clock speed 3.2 GHz vs 2.3 GHz Around 40% higher clock speed
Significantly better overclocked clock speed (Air) 3.99 GHz vs 2.76 GHz Around 45% better overclocked clock speed (Air)
Lower typical power consumption 101.56W vs 113.75W More than 10% lower typical power consumption
More l3 cache per core 1.5 MB/core vs 1 MB/core 50% more l3 cache per core
Higher Maximum operating temperature 62 °C vs 55 °C Around 15% higher Maximum operating temperature
Much better overclocked clock speed (Water) 4.14 GHz vs 2.3 GHz More than 80% better overclocked clock speed (Water)
Lower annual home energy cost 30.11 $/year vs 33.73 $/year More than 10% lower annual home energy cost
Lower annual commercial energy cost 109.5 $/year vs 122.64 $/year More than 10% lower annual commercial energy cost
Front view of AMD Opteron 6176 SE

Reasons to consider the
AMD Opteron 6176 SE

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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
Supports more CPUs in SMP configuration 4 vs 1 3 supports more CPUs in SMP configuration
More cores 12 vs 4 Three times as many cores; run more applications at once
More l3 cache 12 MB vs 6 MB 2x more l3 cache; more data can be stored in the l3 cache for quick access later
More threads 12 vs 4 Three times as many threads
Newer Mar, 2010 vs Nov, 2009 Release date 4 months later

Features Key features of the Phenom II X4 955  vs Opteron 6176 SE 

clock speed

L2 cache

L3 cache

overclocked clock speed (air)

Phenom II X4 955
3.99 GHz
Opteron 6176 SE
2.76 GHz

overclocked clock speed (water)

Specifications Full list of technical specs

summary

Phenom II X4 955  vs
Opteron 6176 SE 
Clock speed 3.2 GHz 2.3 GHz
Cores Quad core Duodeca core
Socket type
AM3
G34
Is unlocked Yes No

features

Has a NX bit Yes Yes
Has virtualization support Yes Yes
Instruction set extensions
SSE4a
SSE2
MMX
SSE3
SSE
3DNow!

power consumption

TDP 125W 140W
Annual home energy cost 30.11 $/year 33.73 $/year
Annual commercial energy cost 109.5 $/year 122.64 $/year
Typical power consumption 101.56W 113.75W

bus

Clock speed 2,000 MHz 3,200 MHz

details

Phenom II X4 955  vs
Opteron 6176 SE 
Threads 4 12
L2 cache 2 MB 6 MB
L2 cache per core 0.5 MB/core 0.5 MB/core
L3 cache 6 MB 12 MB
L3 cache per core 1.5 MB/core 1 MB/core
Manufacture process 45 nm 45 nm
Max CPUs 1 4
Voltage range 0.88 - 1.5V 1.2 - UnknownV
Operating temperature Unknown - 62°C Unknown - 55°C

overclocking

Overclocked clock speed 3.99 GHz 2.76 GHz
Overclocked clock speed (Water) 4.14 GHz 2.3 GHz
Overclocked clock speed (Air) 3.99 GHz 2.76 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
AMD Phenom II X4 955
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AMD Opteron 6176 SE
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