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Differences What are the advantages of each

Front view of Intel Xeon E5-2620

Reasons to consider the
Intel Xeon E5-2620

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Much newer manufacturing process 32 nm vs 90 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Much more l2 cache 2 MB vs 0.25 MB 8x more l2 cache; more data can be stored in the l2 cache for quick access later
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 virtualization support Yes vs No Somewhat common; Boosts performance of virtual machines
More cores 6 vs 1 5 more cores; run more applications at once
More threads 12 vs 1 11 more threads
Supports more CPUs in SMP configuration 2 vs 1 Twice as many CPUs in SMP configuration
Newer Mar, 2012 vs Apr, 2004 Release date over 8 years later
Supports trusted computing Yes vs No Somewhat common; Allows for safer, more reliable computing
Higher Maximum operating temperature 77.4 °C vs 67.7 °C Around 15% higher Maximum operating temperature
More l2 cache per core 0.33 MB/core vs 0.25 MB/core Around 35% more l2 cache per core
Front view of Intel Celeron D 326

Reasons to consider the
Intel Celeron D 326

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Higher clock speed 2.53 GHz vs 2 GHz More than 25% higher clock speed
Much better overclocked clock speed (Air) 3.73 GHz vs 2.28 GHz Around 65% better overclocked clock speed (Air)
Lower typical power consumption 68.25W vs 77.19W More than 10% lower typical power consumption
Much better overclocked clock speed (Water) 4.31 GHz vs 2 GHz Around 2.2x better overclocked clock speed (Water)
Lower annual home energy cost 20.24 $/year vs 22.89 $/year More than 10% lower annual home energy cost
Lower annual commercial energy cost 73.58 $/year vs 83.22 $/year More than 10% lower annual commercial energy cost

Features Key features of the Xeon E5-2620  vs Celeron D 326 

clock speed

Xeon E5-2620
2 GHz
Celeron D 326
2.53 GHz

L2 cache

overclocked clock speed (air)

Xeon E5-2620
2.28 GHz
Celeron D 326
3.73 GHz

overclocked clock speed (water)

Xeon E5-2620
2 GHz
Celeron D 326
4.31 GHz

Specifications Full list of technical specs

summary

Xeon E5-2620  vs
Celeron D 326 
Clock speed 2 GHz 2.53 GHz
Cores Hexa core Single core
Socket type
LGA 2011
LGA 775
478

features

Has a NX bit Yes Yes
Supports trusted computing Yes No
Has virtualization support Yes No
Instruction set extensions
SSE2
MMX
AVX
SSE3
SSE
SSE4.1
SSE4.2
Supplemental SSE3
AES
Supports dynamic frequency scaling Yes No

power consumption

TDP 95W 84W
Annual home energy cost 22.89 $/year 20.24 $/year
Annual commercial energy cost 83.22 $/year 73.58 $/year
Typical power consumption 77.19W 68.25W

memory controller

Memory controller Built-in Built-in
Supports ECC Yes No

details

Xeon E5-2620  vs
Celeron D 326 
Architecture x86-64 x86-64
Threads 12 1
L2 cache 2 MB 0.25 MB
L2 cache per core 0.33 MB/core 0.25 MB/core
Manufacture process 32 nm 90 nm
Max CPUs 2 1
Clock multiplier 25 19
Voltage range 0.6 - 1.35V 1.25 - 1.4V
Operating temperature Unknown - 77.4°C Unknown - 67.7°C

overclocking

Overclocked clock speed 2.28 GHz 3.73 GHz
Overclocked clock speed (Water) 2 GHz 4.31 GHz
Overclocked clock speed (Air) 2.28 GHz 3.73 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

bus

Architecture QPI FSB
Number of links 2 1
Clock speed 3,600 MHz 533 MHz
Intel Xeon E5-2620
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Intel Celeron D 326
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