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Differences What are the advantages of each

Front view of Intel Xeon W3520

Reasons to consider the
Intel Xeon W3520

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Much newer manufacturing process 45 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
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 4 vs 1 3 more cores; run more applications at once
More threads 8 vs 2 6 more threads
Significantly better overclocked clock speed (Air) 4.38 GHz vs 3.33 GHz More than 30% better overclocked clock speed (Air)
Newer Mar, 2009 vs Sep, 2004 Release date over 4 years later
Significantly better overclocked clock speed (Water) 4.46 GHz vs 3.33 GHz Around 35% better overclocked clock speed (Water)
Front view of Intel Pentium 548

Reasons to consider the
Intel Pentium 548

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Higher clock speed 3.33 GHz vs 2.66 GHz More than 25% higher clock speed
Much lower typical power consumption 71.5W vs 105.63W More than 30% lower typical power consumption
Much more l2 cache per core 1 MB/core vs 0.25 MB/core 4x more l2 cache per core
Higher Maximum operating temperature 75 °C vs 67.9 °C More than 10% higher Maximum operating temperature
Much lower annual home energy cost 21.2 $/year vs 31.32 $/year More than 30% lower annual home energy cost
Much lower annual commercial energy cost 77.09 $/year vs 113.88 $/year More than 30% lower annual commercial energy cost

Features Key features of the Xeon W3520  vs Pentium 548 

clock speed

Xeon W3520
2.66 GHz
Pentium 548
3.33 GHz

L2 cache

overclocked clock speed (air)

Xeon W3520
4.38 GHz
Pentium 548
3.33 GHz

overclocked clock speed (water)

Xeon W3520
4.46 GHz
Pentium 548
3.33 GHz

TDP

Specifications Full list of technical specs

summary

Xeon W3520  vs
Pentium 548 
Clock speed 2.66 GHz 3.33 GHz
Cores Quad core Single core
Socket type
LGA 1366
478

features

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

power consumption

TDP 130W 88W
Annual home energy cost 31.32 $/year 21.2 $/year
Annual commercial energy cost 113.88 $/year 77.09 $/year
Typical power consumption 105.63W 71.5W

bus

Architecture QPI FSB
Number of links 1 1
Clock speed 2,400 MHz 533 MHz

details

Xeon W3520  vs
Pentium 548 
Architecture x86-64 x86
Threads 8 2
L2 cache 1 MB 1 MB
L2 cache per core 0.25 MB/core 1 MB/core
Manufacture process 45 nm 90 nm
Transistor count 731,000,000 125,000,000
Max CPUs 1 1
Clock multiplier 20 25
Voltage range 0.8 - 1.38V 1.25 - 1.4V
Operating temperature Unknown - 67.9°C Unknown - 75°C

overclocking

Overclocked clock speed 4.38 GHz 3.33 GHz
Overclocked clock speed (Water) 4.46 GHz 3.33 GHz
Overclocked clock speed (Air) 4.38 GHz 3.33 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
Intel Xeon W3520
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Intel Pentium 548
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