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Differences What are the advantages of each

Front view of Intel Xeon E3-1245 v2

Reasons to consider the
Intel Xeon E3-1245 v2

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Much higher clock speed 3.4 GHz vs 2.4 GHz More than 40% higher clock speed
Supports dynamic frequency scaling Yes vs No Somewhat common; Allows for maximum performance when needed, while conserving power and minimizing heat production when not needed
Has a built-in GPU Yes vs No Somewhat common; A separate graphics adapter is not required
Much better overclocked clock speed (Air) 3.75 GHz vs 2.4 GHz More than 55% better overclocked clock speed (Air)
More threads 8 vs 4 Twice as many threads
Much better overclocked clock speed (Water) 3.4 GHz vs 2.4 GHz More than 40% better overclocked clock speed (Water)
Front view of Intel Atom C2538

Reasons to consider the
Intel Atom C2538

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Much lower typical power consumption 12.19W vs 62.56W 5.1x lower typical power consumption
Supports more RAM 65,536 MB vs 33,556.48 MB Supports more than 95% more RAM
Much lower annual commercial energy cost 13.14 $/year vs 67.45 $/year 5.1x lower annual commercial energy cost
Much lower annual home energy cost 3.61 $/year vs 18.55 $/year 5.1x lower annual home energy cost
Newer Jul, 2013 vs May, 2012 Release date over 1 years later

Features Key features of the Xeon E3-1245 v2  vs Atom C2538 

clock speed

Xeon E3-1245 v2
3.4 GHz
Atom C2538
2.4 GHz

overclocked clock speed (air)

Xeon E3-1245 v2
3.75 GHz
Atom C2538
2.4 GHz

overclocked clock speed (water)

Xeon E3-1245 v2
3.4 GHz
Atom C2538
2.4 GHz

Specifications Full list of technical specs

summary

Xeon E3-1245 v2  vs
Atom C2538 
Clock speed 3.4 GHz 2.4 GHz
Cores Quad core Quad core

features

Has a NX bit 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 No

power consumption

TDP 77W 15W
Annual home energy cost 18.55 $/year 3.61 $/year
Annual commercial energy cost 67.45 $/year 13.14 $/year
Typical power consumption 62.56W 12.19W

bus

Architecture DMI FSB
Number of links 1 1

details

Xeon E3-1245 v2  vs
Atom C2538 
Architecture x86-64 x86-64
Threads 8 4
Manufacture process 22 nm 22 nm
Max CPUs 1 1

overclocking

Overclocked clock speed 3.75 GHz 2.4 GHz
Overclocked clock speed (Water) 3.4 GHz 2.4 GHz
Overclocked clock speed (Air) 3.75 GHz 2.4 GHz

integrated graphics

GPU GPU None
Label Intel® HD Graphics P4000 N/A
Number of displays supported 3 N/A
GPU clock speed 650 MHz N/A
Turbo clock speed 1,250 MHz N/A

memory controller

Memory controller Built-in Built-in
Memory type
DDR3-1600
DDR3-1333
DDR3
Channels Dual Channel Dual Channel
Supports ECC Yes Yes
Maximum bandwidth 25,600 MB/s 12,800 MB/s
Maximum memory size 33,556.48 MB 65,536 MB
Intel Xeon E3-1245 v2
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Intel Atom C2538
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