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Differences What are the advantages of each

Front view of Intel Pentium 4 672

Reasons to consider the
Intel Pentium 4 672

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Much higher clock speed 3.8 GHz vs 1.66 GHz More than 2.2x higher clock speed
Much more l2 cache 2 MB vs 0.5 MB 4x more l2 cache; more data can be stored in the l2 cache for quick access later
Much more l2 cache per core 2 MB/core vs 0.5 MB/core 4x more l2 cache per core
Has virtualization support Yes vs No Somewhat common; Boosts performance of virtual machines
Much better overclocked clock speed (Air) 3.8 GHz vs 1.88 GHz More than 2x better overclocked clock speed (Air)
Much better overclocked clock speed (Water) 5.74 GHz vs 1.67 GHz Around 3.5x better overclocked clock speed (Water)
Front view of Intel Atom N455

Reasons to consider the
Intel Atom N455

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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
Much lower typical power consumption 5.28W vs 93.44W 17.7x lower typical power consumption
Has a built-in GPU Yes vs No Somewhat common; A separate graphics adapter is not required
Newer Jun, 2010 vs Nov, 2005 Release date over 4 years later
Much lower annual home energy cost 1.57 $/year vs 27.7 $/year 17.7x lower annual home energy cost
Much lower annual commercial energy cost 5.69 $/year vs 100.74 $/year 17.7x lower annual commercial energy cost

Features Key features of the Pentium 4 672  vs Atom N455 

clock speed

Pentium 4 672
3.8 GHz
Atom N455
1.66 GHz

L2 cache

Atom N455
0.5 MB

overclocked clock speed (air)

Pentium 4 672
3.8 GHz
Atom N455
1.88 GHz

overclocked clock speed (water)

Pentium 4 672
5.74 GHz
Atom N455
1.67 GHz

TDP

Specifications Full list of technical specs

summary

Pentium 4 672  vs
Atom N455 
Clock speed 3.8 GHz 1.66 GHz
Cores Single core Single core

features

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

power consumption

TDP 115W 6.5W
Annual home energy cost 27.7 $/year 1.57 $/year
Annual commercial energy cost 100.74 $/year 5.69 $/year
Typical power consumption 93.44W 5.28W

details

Pentium 4 672  vs
Atom N455 
Architecture x86-64 x86-64
Threads 2 2
L2 cache 2 MB 0.5 MB
L2 cache per core 2 MB/core 0.5 MB/core
Manufacture process 90 nm 45 nm
Transistor count 169,000,000 123,000,000
Max CPUs 1 1
Clock multiplier 19 10

overclocking

Overclocked clock speed 3.8 GHz 1.88 GHz
Overclocked clock speed (Water) 5.74 GHz 1.67 GHz
Overclocked clock speed (Air) 3.8 GHz 1.88 GHz

integrated graphics

GPU None GPU
Label N/A Integrated
GPU clock speed N/A 200 MHz

bus

Architecture FSB DMI
Number of links 1 1
Intel Pentium 4 672
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Intel Atom N455
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