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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 higher clock speed 2.5 GHz vs 2 GHz 25% higher clock speed
Much more l2 cache per core 3 MB/core vs 1 MB/core 3x more l2 cache per core
Much better overclocked clock speed (Air) 3.67 GHz vs 2 GHz Around 85% better overclocked clock speed (Air)
More cores 4 vs 2 Twice as many cores; run more applications at once
Much newer manufacturing process 45 nm vs 90 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Significantly lower typical power consumption 40.63W vs 69.06W More than 40% lower typical power consumption
More threads 4 vs 2 Twice as many threads
Much better overclocked clock speed (Water) 3.85 GHz vs 2 GHz Around 95% better overclocked clock speed (Water)
Significantly lower annual commercial energy cost 43.8 $/year vs 74.46 $/year More than 40% lower annual commercial energy cost
Significantly lower annual home energy cost 12.04 $/year vs 20.48 $/year More than 40% lower annual home energy cost
Newer Mar, 2008 vs May, 2005 Release date over 2 years later
Front view of AMD Opteron 270

Reasons to consider the
AMD Opteron 270

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CPUBoss is not aware of any important advantages of the AMD Opteron 270 vs the Intel Xeon L5420.

Benchmarks Real world tests of Xeon L5420 vs Opteron 270

PassMark Data courtesy Passmark

Xeon L5420
3,506
Opteron 270
1,083

Specifications Full list of technical specs

summary

Xeon L5420  vs
Opteron 270 
Clock speed 2.5 GHz 2 GHz
Cores Quad core Dual core
Socket type
LGA 771
940

features

Has a NX bit Yes Yes
Instruction set extensions
SSE2
MMX
SSE3
SSE
SSE4.1
3DNow!
Supports dynamic frequency scaling Yes Yes

details

Xeon L5420  vs
Opteron 270 
Threads 4 2
L2 cache 12 MB 2 MB
L2 cache per core 3 MB/core 1 MB/core
Manufacture process 45 nm 90 nm
Max CPUs 2 2
Clock multiplier 7 10
Voltage range 0.85 - 1.35V 1.2 - UnknownV
Operating temperature Unknown - 57°C 0 - 67°C

overclocking

Overclocked clock speed 3.67 GHz 2 GHz
Overclocked clock speed (Water) 3.85 GHz 2 GHz
Overclocked clock speed (Air) 3.67 GHz 2 GHz

power consumption

TDP 50W 85W
Annual home energy cost 12.04 $/year 20.48 $/year
Annual commercial energy cost 43.8 $/year 74.46 $/year
Performance per watt 2.75 pt/W 0.52 pt/W
Typical power consumption 40.63W 69.06W
Intel Xeon L5420
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AMD Opteron 270
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