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Differences What are the advantages of each

Front view of Intel Xeon W3520

Reasons to consider the
Intel Xeon W3520

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Higher clock speed 2.66 GHz vs 2.2 GHz More than 20% higher clock speed
Much better overclocked clock speed (Air) 4.38 GHz vs 2.2 GHz Around 2x better overclocked clock speed (Air)
More threads 8 vs 2 6 more threads
More cores 4 vs 2 Twice as many cores; run more applications at once
Much better overclocked clock speed (Water) 4.46 GHz vs 2.2 GHz More than 2x better overclocked clock speed (Water)
Front view of AMD Athlon II XLT V50L

Reasons to consider the
AMD Athlon II XLT V50L

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Significantly more l2 cache 2 MB vs 1 MB 2x more l2 cache; more data can be stored in the l2 cache for quick access later
Much lower typical power consumption 20.31W vs 105.63W 5.2x lower typical power consumption
Much more l2 cache per core 1 MB/core vs 0.25 MB/core 4x more l2 cache per core
Much lower annual home energy cost 6.02 $/year vs 31.32 $/year 5.2x lower annual home energy cost
Much lower annual commercial energy cost 21.9 $/year vs 113.88 $/year 5.2x lower annual commercial energy cost
Newer Apr, 2010 vs Mar, 2009 Release date over 1 years later

Features Key features of the Xeon W3520  vs Athlon II XLT V50L 

clock speed

Xeon W3520
2.66 GHz

L2 cache

overclocked clock speed (air)

Xeon W3520
4.38 GHz

overclocked clock speed (water)

Xeon W3520
4.46 GHz

Specifications Full list of technical specs

summary

Xeon W3520  vs
Athlon II XLT V50L 
Clock speed 2.66 GHz 2.2 GHz
Cores Quad core Dual core
Socket type
LGA 1366
AM3

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
3DNow!
Supplemental SSE3
Supports dynamic frequency scaling Yes Yes

bus

Clock speed 2,400 MHz 2,000 MHz

details

Xeon W3520  vs
Athlon II XLT V50L 
Threads 8 2
L2 cache 1 MB 2 MB
L2 cache per core 0.25 MB/core 1 MB/core
Manufacture process 45 nm 45 nm
Max CPUs 1 1

overclocking

Overclocked clock speed 4.38 GHz 2.2 GHz
Overclocked clock speed (Water) 4.46 GHz 2.2 GHz
Overclocked clock speed (Air) 4.38 GHz 2.2 GHz

power consumption

TDP 130W 25W
Annual home energy cost 31.32 $/year 6.02 $/year
Annual commercial energy cost 113.88 $/year 21.9 $/year
Typical power consumption 105.63W 20.31W
Intel Xeon W3520
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AMD Athlon II XLT V50L
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