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Differences What are the advantages of each

Front view of Intel Xeon L5408

Reasons to consider the
Intel Xeon L5408

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Much more l2 cache 12 MB vs 4 MB 3x more l2 cache; more data can be stored in the l2 cache for quick access later
More cores 4 vs 2 Twice as many cores; run more applications at once
Much more l2 cache per core 3 MB/core vs 2 MB/core 50% more l2 cache per core
Much better overclocked clock speed (Air) 3.34 GHz vs 2.13 GHz More than 55% better overclocked clock speed (Air)
Newer manufacturing process 45 nm vs 65 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Much better overclocked clock speed (Water) 4.12 GHz vs 2.13 GHz Around 95% better overclocked clock speed (Water)
More threads 4 vs 2 Twice as many threads
Newer Feb, 2008 vs Dec, 2006 Release date over 1 years later
Front view of Intel Xeon 5138

Reasons to consider the
Intel Xeon 5138

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Slightly lower typical power consumption 28.44W vs 32.5W Around 15% lower typical power consumption
Slightly lower annual commercial energy cost 30.66 $/year vs 35.04 $/year More than 10% lower annual commercial energy cost
Slightly lower annual home energy cost 8.43 $/year vs 9.64 $/year More than 10% lower annual home energy cost

Features Key features of the Xeon L5408  vs 5138 

clock speed

Xeon L5408
2.13 GHz
Xeon 5138
2.13 GHz

L2 cache

Xeon L5408
12 MB
Xeon 5138
4 MB

overclocked clock speed (air)

Xeon L5408
3.34 GHz
Xeon 5138
2.13 GHz

overclocked clock speed (water)

Xeon L5408
4.12 GHz
Xeon 5138
2.13 GHz

TDP

Specifications Full list of technical specs

summary

Xeon L5408  vs
5138 
Clock speed 2.13 GHz 2.13 GHz
Cores Quad core Dual core
Socket type
LGA 771

features

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

power consumption

TDP 40W 35W
Annual home energy cost 9.64 $/year 8.43 $/year
Annual commercial energy cost 35.04 $/year 30.66 $/year
Typical power consumption 32.5W 28.44W

bus

Architecture FSB FSB
Number of links 1 1
Clock speed 1,066 MHz 1,066 MHz

details

Xeon L5408  vs
5138 
Architecture x86-64 x86-64
Threads 4 2
L2 cache 12 MB 4 MB
L2 cache per core 3 MB/core 2 MB/core
Manufacture process 45 nm 65 nm
Transistor count 820,000,000 291,000,000
Max CPUs 2 2
Clock multiplier 8 8
Voltage range 0.85 - 1.35V 1 - 1.5V
Operating temperature Unknown - 72°C Unknown - 70.8°C

overclocking

Overclocked clock speed 3.34 GHz 2.13 GHz
Overclocked clock speed (Water) 4.12 GHz 2.13 GHz
Overclocked clock speed (Air) 3.34 GHz 2.13 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 L5408
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Intel Xeon 5138
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