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Differences What are the advantages of each

Front view of Intel Xeon X5355

Reasons to consider the
Intel Xeon X5355

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Much more l2 cache 8 MB vs 2 MB 4x more l2 cache; more data can be stored in the l2 cache for quick access later
Much more l2 cache per core 2 MB/core vs 0.5 MB/core 4x more l2 cache per core
Much better overclocked clock speed (Air) 3.24 GHz vs 2.8 GHz More than 15% better overclocked clock speed (Air)
Front view of AMD Opteron 2386 SE

Reasons to consider the
AMD Opteron 2386 SE

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Higher clock speed 2.8 GHz vs 2.66 GHz More than 5% higher clock speed
Newer manufacturing process 45 nm vs 65 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Lower typical power consumption 85.31W vs 97.5W Around 15% lower typical power consumption
Newer Jan, 2009 vs Nov, 2006 Release date over 2 years later
Better overclocked clock speed (Water) 2.8 GHz vs 2.66 GHz More than 5% better overclocked clock speed (Water)
Lower annual commercial energy cost 91.98 $/year vs 105.12 $/year Around 15% lower annual commercial energy cost
Lower annual home energy cost 25.29 $/year vs 28.91 $/year Around 15% lower annual home energy cost

Benchmarks Real world tests of Xeon X5355 vs Opteron 2386 SE

PassMark Data courtesy Passmark

Specifications Full list of technical specs

summary

Xeon X5355  vs
Opteron 2386 SE 
Clock speed 2.66 GHz 2.8 GHz
Cores Quad core Quad core
Socket type
LGA 771
F

features

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

power consumption

TDP 120W 105W
Annual home energy cost 28.91 $/year 25.29 $/year
Annual commercial energy cost 105.12 $/year 91.98 $/year
Performance per watt 1.37 pt/W 1.38 pt/W
Typical power consumption 97.5W 85.31W

details

Xeon X5355  vs
Opteron 2386 SE 
Threads 4 4
L2 cache 8 MB 2 MB
L2 cache per core 2 MB/core 0.5 MB/core
Manufacture process 65 nm 45 nm
Max CPUs 2 2
Clock multiplier 8 14
Voltage range 1 - 1.5V 1.32 - UnknownV

overclocking

Overclocked clock speed 3.24 GHz 2.8 GHz
Overclocked clock speed (Water) 2.66 GHz 2.8 GHz
Overclocked clock speed (Air) 3.24 GHz 2.8 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

Clock speed 1,333 MHz 2,200 MHz
Intel Xeon X5355
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AMD Opteron 2386 SE
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