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Differences What are the advantages of each

Front view of Intel Xeon E3-1220

Reasons to consider the
Intel Xeon E3-1220

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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
More advanced architecture x86-64 vs x86 A 64-bit architecture allows more RAM to be installed and accessed by the processor
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
Higher clock speed 3.1 GHz vs 2.8 GHz More than 10% higher clock speed
Newer Apr, 2011 vs Apr, 2004 Release date over 7 years later
Supports trusted computing Yes vs No Somewhat common; Allows for safer, more reliable computing
More cores 4 vs 1 3 more cores; run more applications at once
More threads 4 vs 2 Twice as many threads
Front view of Intel Pentium 4 520J

Reasons to consider the
Intel Pentium 4 520J

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Much more l2 cache per core 1 MB/core vs 0.25 MB/core 4x more l2 cache per core
Better overclocked clock speed (Air) 3.77 GHz vs 3.49 GHz Around 10% better overclocked clock speed (Air)
Significantly better overclocked clock speed (Water) 4.16 GHz vs 3.1 GHz Around 35% better overclocked clock speed (Water)

Features Key features of the Xeon E3-1220  vs Pentium 4 520J 

clock speed

Xeon E3-1220
3.1 GHz
Pentium 4 520J
2.8 GHz

L2 cache

overclocked clock speed (air)

Xeon E3-1220
3.49 GHz
Pentium 4 520J
3.77 GHz

overclocked clock speed (water)

Xeon E3-1220
3.1 GHz
Pentium 4 520J
4.16 GHz

Specifications Full list of technical specs

summary

Xeon E3-1220  vs
Pentium 4 520J 
Clock speed 3.1 GHz 2.8 GHz
Cores Quad core Single core
Socket type
LGA 1155
LGA 775

features

Has a NX bit Yes Yes
Supports trusted computing Yes No
Has virtualization support Yes No
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 80W 84W
Annual home energy cost 19.27 $/year 20.24 $/year
Annual commercial energy cost 70.08 $/year 73.58 $/year
Typical power consumption 65W 68.25W

details

Xeon E3-1220  vs
Pentium 4 520J 
Architecture x86-64 x86
Threads 4 2
L2 cache 1 MB 1 MB
L2 cache per core 0.25 MB/core 1 MB/core
Manufacture process 32 nm 90 nm
Max CPUs 1 1
Clock multiplier 31 14
Operating temperature Unknown - 69.1°C Unknown - 67.7°C

overclocking

Overclocked clock speed 3.49 GHz 3.77 GHz
Overclocked clock speed (Water) 3.1 GHz 4.16 GHz
Overclocked clock speed (Air) 3.49 GHz 3.77 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 DMI FSB
Number of links 1 1
Intel Xeon E3-1220
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Intel Pentium 4 520J
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