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Differences What are the advantages of each

Front view of Intel Xeon X5650

Reasons to consider the
Intel Xeon X5650

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Much more l3 cache 12 MB vs 8 MB 50% more l3 cache; more data can be stored in the l3 cache for quick access later
Much higher Maximum operating temperature 81.3 °C vs 70.5 °C More than 15% higher Maximum operating temperature
Much better overclocked clock speed (Air) 3.84 GHz vs 2.7 GHz More than 40% better overclocked clock speed (Air)
More threads 12 vs 6 Twice as many threads
Much better overclocked clock speed (Water) 4.64 GHz vs 2.7 GHz More than 70% better overclocked clock speed (Water)
Significantly more l3 cache per core 2 MB/core vs 1.33 MB/core More than 50% more l3 cache per core
Front view of AMD Opteron 4226

Reasons to consider the
AMD Opteron 4226

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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 more l2 cache per core 1 MB/core vs 0.33 MB/core More than 3x more l2 cache per core
Slightly higher clock speed 2.7 GHz vs 2.66 GHz Almost the same
Newer Nov, 2011 vs Mar, 2010 Release date over 1 years later

Features Key features of the Xeon X5650  vs Opteron 4226 

clock speed

Xeon X5650
2.66 GHz
Opteron 4226
2.7 GHz

turbo clock speed

Xeon X5650
3.06 GHz
Opteron 4226
3.1 GHz

L2 cache

L3 cache

overclocked clock speed (air)

Xeon X5650
3.84 GHz
Opteron 4226
2.7 GHz

overclocked clock speed (water)

Xeon X5650
4.64 GHz
Opteron 4226
2.7 GHz

Specifications Full list of technical specs

summary

Xeon X5650  vs
Opteron 4226 
Clock speed 2.66 GHz 2.7 GHz
Turbo clock speed 3.06 GHz 3.1 GHz
Cores Hexa core Hexa core
Socket type
LGA 1366
C32

features

Has a NX bit Yes Yes
Has virtualization support Yes Yes
Instruction set extensions
SSE4a
SSE2
MMX
SSE4
SSE3
SSE
SSE4.1
SSE4.2
Supplemental SSE3
AES

power consumption

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

memory controller

Memory controller Built-in Built-in
Memory type
DDR3-1333
DDR3-1066
DDR3-800
DDR3

details

Xeon X5650  vs
Opteron 4226 
Threads 12 6
L2 cache 2 MB 6 MB
L2 cache per core 0.33 MB/core 1 MB/core
L3 cache 12 MB 8 MB
L3 cache per core 2 MB/core 1.33 MB/core
Manufacture process 32 nm 32 nm
Max CPUs 2 2
Clock multiplier 20 15
Operating temperature Unknown - 81.3°C Unknown - 70.5°C

overclocking

Overclock popularity 11 0
Overclocked clock speed 3.84 GHz 2.7 GHz
Overclocked clock speed (Water) 4.64 GHz 2.7 GHz
Overclocked clock speed (Air) 3.84 GHz 2.7 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 QPI HyperTransport 3.0
Number of links 2 2
Transfer rate 6,400 MT/s 6,400 MT/s
Clock speed 3,200 MHz 3,200 MHz
Intel Xeon X5650
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AMD Opteron 4226
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