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Differences What are the advantages of each

Front view of Intel Xeon E5-2408L v3

Reasons to consider the
Intel Xeon E5-2408L v3

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Supports more RAM 393,216 MB vs 33,556.48 MB Supports around 11.8x more RAM
Supports more CPUs in SMP configuration 2 vs 1 Twice as many CPUs in SMP configuration
Newer Jan, 2015 vs May, 2012 Release date over 2 years later
Front view of Intel Xeon E3-1265L v2

Reasons to consider the
Intel Xeon E3-1265L v2

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Much higher clock speed 2.5 GHz vs 1.8 GHz Around 40% higher clock speed
Has a built-in GPU Yes vs No Somewhat common; A separate graphics adapter is not required
Much better overclocked clock speed (Air) 2.5 GHz vs 1.8 GHz Around 40% better overclocked clock speed (Air)
Much better overclocked clock speed (Water) 2.5 GHz vs 1.8 GHz Around 40% better overclocked clock speed (Water)

Features Key features of the Xeon E5-2408L v3  vs E3-1265L v2 

clock speed

overclocked clock speed (air)

overclocked clock speed (water)

Specifications Full list of technical specs

summary

Xeon E5-2408L v3  vs
E3-1265L v2 
Clock speed 1.8 GHz 2.5 GHz
Cores Quad core Quad core

features

Has a NX bit Yes Yes
Supports trusted computing Yes Yes
Has virtualization support Yes Yes
Instruction set extensions
SSE2
MMX
SSE4
AVX
SSE3
SSE
SSE4.1
SSE4.2
Supplemental SSE3
AES
Supports dynamic frequency scaling Yes Yes

power consumption

TDP 45W 45W
Annual home energy cost 10.84 $/year 10.84 $/year
Annual commercial energy cost 39.42 $/year 39.42 $/year
Typical power consumption 36.56W 36.56W

bus

Architecture QPI DMI
Number of links 1 1
Transfer rate 6,400 MT/s 5,000 MT/s

details

Xeon E5-2408L v3  vs
E3-1265L v2 
Architecture x86-64 x86-64
Threads 8 8
Manufacture process 22 nm 22 nm
Max CPUs 2 1

overclocking

Overclocked clock speed 1.8 GHz 2.5 GHz
Overclocked clock speed (Water) 1.8 GHz 2.5 GHz
Overclocked clock speed (Air) 1.8 GHz 2.5 GHz

integrated graphics

GPU None GPU
Label N/A Intel® HD Graphics 2500
Number of displays supported N/A 3
GPU clock speed N/A 650 MHz
Turbo clock speed N/A 1,150 MHz

memory controller

Memory controller Built-in Built-in
Memory type
DDR3-1600
DDR3-1333
DDR3-1066
DDR3
DDR3-800
Channels Triple Channel Dual Channel
Supports ECC Yes Yes
Maximum bandwidth 38,400 MB/s 25,600 MB/s
Maximum memory size 393,216 MB 33,556.48 MB
Intel Xeon E5-2408L v3
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Intel Xeon E3-1265L v2
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