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Differences What are the advantages of each

Front view of Intel Pentium 4 661

Reasons to consider the
Intel Pentium 4 661

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Much higher clock speed 3.6 GHz vs 2 GHz 80% higher clock speed
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
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
Much more l2 cache per core 2 MB/core vs 1 MB/core 2x more l2 cache per core
Much better overclocked clock speed (Air) 4.55 GHz vs 2.27 GHz More than 2x better overclocked clock speed (Air)
Much better overclocked clock speed (Water) 5.04 GHz vs 2 GHz More than 2.5x better overclocked clock speed (Water)
Front view of Intel Celeron 550

Reasons to consider the
Intel Celeron 550

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Much lower typical power consumption 25.19W vs 69.88W 2.8x lower typical power consumption
Much lower annual home energy cost 7.47 $/year vs 20.72 $/year 2.8x lower annual home energy cost
Much lower annual commercial energy cost 27.16 $/year vs 75.34 $/year 2.8x lower annual commercial energy cost
Newer Sep, 2007 vs Jan, 2006 Release date over 1 years later

Features Key features of the Pentium 4 661  vs Celeron 550 

clock speed

Pentium 4 661
3.6 GHz
Celeron 550
2 GHz

L2 cache

overclocked clock speed (air)

Pentium 4 661
4.55 GHz
Celeron 550
2.27 GHz

overclocked clock speed (water)

Pentium 4 661
5.04 GHz
Celeron 550
2 GHz

Specifications Full list of technical specs

summary

Pentium 4 661  vs
Celeron 550 
Clock speed 3.6 GHz 2 GHz
Cores Single core Single core
Socket type
LGA 775
479

features

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

power consumption

TDP 86W 31W
Annual home energy cost 20.72 $/year 7.47 $/year
Annual commercial energy cost 75.34 $/year 27.16 $/year
Typical power consumption 69.88W 25.19W

bus

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

details

Pentium 4 661  vs
Celeron 550 
Architecture x86-64 x86-64
Threads 2 1
L2 cache 2 MB 1 MB
L2 cache per core 2 MB/core 1 MB/core
Manufacture process 65 nm 65 nm
Transistor count 188,000,000 291,000,000
Max CPUs 1 1
Clock multiplier 18 15
Voltage range 1.2 - 1.34V 0.95 - 1.3V

overclocking

Overclocked clock speed 4.55 GHz 2.27 GHz
Overclocked clock speed (Water) 5.04 GHz 2 GHz
Overclocked clock speed (Air) 4.55 GHz 2.27 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 Pentium 4 661
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Intel Celeron 550
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