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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 2.81 GHz More than 30% better overclocked clock speed (Air)
Lower typical power consumption 40.63W vs 60.94W Around 35% lower typical power consumption
Much better overclocked clock speed (Water) 3.85 GHz vs 2.6 GHz Around 50% better overclocked clock speed (Water)
Lower annual commercial energy cost 43.8 $/year vs 65.7 $/year Around 35% lower annual commercial energy cost
Lower annual home energy cost 12.04 $/year vs 18.07 $/year Around 35% lower annual home energy cost
Front view of AMD Opteron 8382

Reasons to consider the
AMD Opteron 8382

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Higher clock speed 2.6 GHz vs 2.5 GHz Around 5% higher clock speed
Supports more CPUs in SMP configuration 8 vs 2 6 supports more CPUs in SMP configuration
Newer Nov, 2008 vs Mar, 2008 Release date 7 months later

Features Key features of the Xeon L5420  vs Opteron 8382 

clock speed

Xeon L5420
2.5 GHz
Opteron 8382
2.6 GHz

L2 cache

overclocked clock speed (air)

Xeon L5420
3.67 GHz
Opteron 8382
2.81 GHz

overclocked clock speed (water)

Xeon L5420
3.85 GHz
Opteron 8382
2.6 GHz

TDP

Specifications Full list of technical specs

summary

Xeon L5420  vs
Opteron 8382 
Clock speed 2.5 GHz 2.6 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 75W
Annual home energy cost 12.04 $/year 18.07 $/year
Annual commercial energy cost 43.8 $/year 65.7 $/year
Typical power consumption 40.63W 60.94W

bus

Clock speed 1,333 MHz 2,200 MHz

details

Xeon L5420  vs
Opteron 8382 
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 8
Clock multiplier 7 13
Voltage range 0.85 - 1.35V 1.3 - UnknownV
Operating temperature Unknown - 57°C 0 - 55°C

overclocking

Overclocked clock speed 3.67 GHz 2.81 GHz
Overclocked clock speed (Water) 3.85 GHz 2.6 GHz
Overclocked clock speed (Air) 3.67 GHz 2.81 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 8382
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