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Differences What are the advantages of each

Front view of Intel Xeon L5420

Reasons to consider the
Intel Xeon L5420

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Much more l2 cache 12 MB vs 2 MB 6x more l2 cache; more data can be stored in the l2 cache for quick access later
Much more l2 cache per core 3 MB/core vs 0.5 MB/core 6x more l2 cache per core
Much better overclocked clock speed (Air) 3.67 GHz vs 2.4 GHz Around 55% better overclocked clock speed (Air)
Higher clock speed 2.5 GHz vs 2.4 GHz Around 5% higher clock speed
Much better overclocked clock speed (Water) 3.85 GHz vs 2.4 GHz More than 60% better overclocked clock speed (Water)
Front view of AMD Opteron 2379 HE

Reasons to consider the
AMD Opteron 2379 HE

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Newer Apr, 2009 vs Mar, 2008 Release date over 1 years later

Features Key features of the Xeon L5420  vs Opteron 2379 HE 

clock speed

Xeon L5420
2.5 GHz
Opteron 2379 HE
2.4 GHz

L2 cache

overclocked clock speed (air)

Xeon L5420
3.67 GHz
Opteron 2379 HE
2.4 GHz

overclocked clock speed (water)

Xeon L5420
3.85 GHz
Opteron 2379 HE
2.4 GHz

Specifications Full list of technical specs

summary

Xeon L5420  vs
Opteron 2379 HE 
Clock speed 2.5 GHz 2.4 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
SSE4.1
3DNow!
Supports dynamic frequency scaling Yes Yes

power consumption

TDP 50W 55W
Annual home energy cost 12.04 $/year 13.25 $/year
Annual commercial energy cost 43.8 $/year 48.18 $/year
Typical power consumption 40.63W 44.69W

bus

Architecture FSB HyperTransport 3.0
Clock speed 1,333 MHz 2,000 MHz

details

Xeon L5420  vs
Opteron 2379 HE 
Threads 4 4
L2 cache 12 MB 2 MB
L2 cache per core 3 MB/core 0.5 MB/core
Manufacture process 45 nm 45 nm
Max CPUs 2 2
Clock multiplier 7 12
Voltage range 0.85 - 1.35V 1.32 - UnknownV
Operating temperature Unknown - 57°C 0 - 55°C

overclocking

Overclocked clock speed 3.67 GHz 2.4 GHz
Overclocked clock speed (Water) 3.85 GHz 2.4 GHz
Overclocked clock speed (Air) 3.67 GHz 2.4 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
Intel Xeon L5420
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AMD Opteron 2379 HE
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