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Differences What are the advantages of each

Front view of Intel Xeon E5-2420

Reasons to consider the
Intel Xeon E5-2420

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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
Significantly more l2 cache 2 MB vs 1 MB 2x more l2 cache; more data can be stored in the l2 cache for quick access later
More advanced architecture x86-64 vs x86 A 64-bit architecture allows more RAM to be installed and accessed by the processor
Has a NX bit Yes vs No Somewhat common; Prevents a common class of security exploits
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 2 10 more threads
Supports more CPUs in SMP configuration 2 vs 1 Twice as many CPUs in SMP configuration
Newer May, 2012 vs Jan, 2005 Release date over 7 years later
Supports trusted computing Yes vs No Somewhat common; Allows for safer, more reliable computing
Front view of Intel Pentium 552

Reasons to consider the
Intel Pentium 552

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Much higher clock speed 3.46 GHz vs 1.9 GHz More than 80% higher clock speed
Much more l2 cache per core 1 MB/core vs 0.33 MB/core More than 3x more l2 cache per core
Significantly better overclocked clock speed (Air) 3.59 GHz vs 2.36 GHz More than 50% better overclocked clock speed (Air)
Lower typical power consumption 71.5W vs 77.19W More than 5% lower typical power consumption
Much better overclocked clock speed (Water) 4.18 GHz vs 1.9 GHz Around 2.2x better overclocked clock speed (Water)
Lower annual home energy cost 21.2 $/year vs 22.89 $/year More than 5% lower annual home energy cost
Lower annual commercial energy cost 77.09 $/year vs 83.22 $/year More than 5% lower annual commercial energy cost

Features Key features of the Xeon E5-2420  vs Pentium 552 

clock speed

Xeon E5-2420
1.9 GHz
Pentium 552
3.46 GHz

L2 cache

overclocked clock speed (air)

Xeon E5-2420
2.36 GHz
Pentium 552
3.59 GHz

overclocked clock speed (water)

Xeon E5-2420
1.9 GHz
Pentium 552
4.18 GHz

Specifications Full list of technical specs

summary

Xeon E5-2420  vs
Pentium 552 
Clock speed 1.9 GHz 3.46 GHz
Cores Hexa core Single core

features

Has a NX bit Yes No
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 Yes

power consumption

TDP 95W 88W
Annual home energy cost 22.89 $/year 21.2 $/year
Annual commercial energy cost 83.22 $/year 77.09 $/year
Typical power consumption 77.19W 71.5W

details

Xeon E5-2420  vs
Pentium 552 
Architecture x86-64 x86
Threads 12 2
L2 cache 2 MB 1 MB
L2 cache per core 0.33 MB/core 1 MB/core
Manufacture process 32 nm 90 nm
Max CPUs 2 1
Voltage range 0.6 - 1.35V 1.25 - 1.4V

overclocking

Overclocked clock speed 2.36 GHz 3.59 GHz
Overclocked clock speed (Water) 1.9 GHz 4.18 GHz
Overclocked clock speed (Air) 2.36 GHz 3.59 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 1 1
Clock speed 3,600 MHz 533 MHz
Intel Xeon E5-2420
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Intel Pentium 552
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