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Differences What are the advantages of each

Front view of Intel Pentium 518

Reasons to consider the
Intel Pentium 518

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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
Higher Maximum operating temperature 75 °C vs 67.7 °C More than 10% higher Maximum operating temperature
Front view of Intel Pentium 4 551

Reasons to consider the
Intel Pentium 4 551

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More advanced architecture x86-64 vs x86 A 64-bit architecture allows more RAM to be installed and accessed by the processor
Higher clock speed 3.4 GHz vs 2.8 GHz More than 20% higher clock speed
Has a NX bit Yes vs No Somewhat common; Prevents a common class of security exploits
Better overclocked clock speed (Air) 4.06 GHz vs 3.28 GHz Around 25% better overclocked clock speed (Air)
Newer Apr, 2005 vs Jun, 2004 Release date 10 months later
Better overclocked clock speed (Water) 3.4 GHz vs 2.8 GHz More than 20% better overclocked clock speed (Water)

Features Key features of the Pentium 518  vs 4 551 

clock speed

Pentium 518
2.8 GHz
Pentium 4 551
3.4 GHz

L2 cache

overclocked clock speed (air)

Pentium 518
3.28 GHz
Pentium 4 551
4.06 GHz

overclocked clock speed (water)

Pentium 518
2.8 GHz
Pentium 4 551
3.4 GHz

Specifications Full list of technical specs

summary

Pentium 518  vs
4 551 
Clock speed 2.8 GHz 3.4 GHz
Cores Single core Single core
Socket type
478
LGA 775

features

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

bus

Architecture FSB FSB
Number of links 1 1
Clock speed 533 MHz 800 MHz

details

Pentium 518  vs
4 551 
Architecture x86 x86-64
Threads 2 2
L2 cache 1 MB 1 MB
L2 cache per core 1 MB/core 1 MB/core
Manufacture process 90 nm 90 nm
Transistor count 125,000,000 125,000,000
Max CPUs 1 1
Clock multiplier 21 17
Voltage range 1.25 - 1.4V 1.2 - 1.43V
Operating temperature Unknown - 75°C Unknown - 67.7°C

overclocking

Overclocked clock speed 3.28 GHz 4.06 GHz
Overclocked clock speed (Water) 2.8 GHz 3.4 GHz
Overclocked clock speed (Air) 3.28 GHz 4.06 GHz

power consumption

TDP 88W 84W
Annual home energy cost 21.2 $/year 20.24 $/year
Annual commercial energy cost 77.09 $/year 73.58 $/year
Typical power consumption 71.5W 68.25W
Intel Pentium 518
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Intel Pentium 4 551
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