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Differences What are the advantages of each

Front view of Intel Xeon L5248

Reasons to consider the
Intel Xeon L5248

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Much more l2 cache 6 MB vs 0.5 MB 12x more l2 cache; more data can be stored in the l2 cache for quick access later
Much higher clock speed 3 GHz vs 1.66 GHz More than 80% higher clock speed
Much more l2 cache per core 3 MB/core vs 0.5 MB/core 6x more l2 cache per core
Has virtualization support Yes vs No Somewhat common; Boosts performance of virtual machines
Supports more CPUs in SMP configuration 2 vs 1 Twice as many CPUs in SMP configuration
Significantly better overclocked clock speed (Air) 3 GHz vs 1.9 GHz Around 60% better overclocked clock speed (Air)
More cores 2 vs 1 Twice as many cores; run more applications at once
Significantly better overclocked clock speed (Water) 3 GHz vs 1.67 GHz More than 80% better overclocked clock speed (Water)
Front view of Intel Atom N450

Reasons to consider the
Intel Atom N450

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Has a built-in GPU Yes vs No Somewhat common; A separate graphics adapter is not required
Much lower typical power consumption 4.47W vs 44.69W 10x lower typical power consumption
Much lower annual home energy cost 1.32 $/year vs 13.25 $/year 10x lower annual home energy cost
Much lower annual commercial energy cost 4.82 $/year vs 48.18 $/year 10x lower annual commercial energy cost
Newer Jan, 2010 vs Sep, 2008 Release date over 1 years later

Features Key features of the Xeon L5248  vs Atom N450 

clock speed

Xeon L5248
3 GHz
Atom N450
1.66 GHz

L2 cache

Xeon L5248
6 MB
Atom N450
0.5 MB

overclocked clock speed (air)

Xeon L5248
3 GHz
Atom N450
1.9 GHz

overclocked clock speed (water)

Xeon L5248
3 GHz
Atom N450
1.67 GHz

TDP

Specifications Full list of technical specs

summary

Xeon L5248  vs
Atom N450 
Clock speed 3 GHz 1.66 GHz
Cores Dual core Single core

features

Has a NX bit Yes Yes
Has virtualization support Yes No
Instruction set extensions
SSE2
MMX
SSE3
SSE
SSE4.1
Supplemental SSE3
Supports dynamic frequency scaling Yes Yes

power consumption

TDP 55W 5.5W
Annual home energy cost 13.25 $/year 1.32 $/year
Annual commercial energy cost 48.18 $/year 4.82 $/year
Typical power consumption 44.69W 4.47W

details

Xeon L5248  vs
Atom N450 
Architecture x86-64 x86-64
Threads 2 2
L2 cache 6 MB 0.5 MB
L2 cache per core 3 MB/core 0.5 MB/core
Manufacture process 45 nm 45 nm
Transistor count 410,000,000 123,000,000
Max CPUs 2 1
Voltage range 0.85 - 1.35V 0.8 - 1.18V

overclocking

Overclocked clock speed 3 GHz 1.9 GHz
Overclocked clock speed (Water) 3 GHz 1.67 GHz
Overclocked clock speed (Air) 3 GHz 1.9 GHz

integrated graphics

GPU None GPU
Label N/A Integrated

bus

Architecture FSB DMI
Number of links 1 1
Intel Xeon L5248
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Intel Atom N450
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