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Differences What are the advantages of each

Front view of Intel Pentium III 600EB

Reasons to consider the
Intel Pentium III 600EB

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Supports more CPUs in SMP configuration 2 vs 1 Twice as many CPUs in SMP configuration
Front view of Intel Atom D2550

Reasons to consider the
Intel Atom D2550

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Much newer manufacturing process 32 nm vs 180 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Much higher clock speed 1.86 GHz vs 0.6 GHz More than 3x higher clock speed
More advanced architecture x86-64 vs x86 A 64-bit architecture allows more RAM to be installed and accessed by the processor
Significantly more l2 cache 1 MB vs 0.25 MB 4x more l2 cache; more data can be stored in the l2 cache for quick access later
Has a built-in GPU Yes vs No Somewhat common; A separate graphics adapter is not required
Has a NX bit Yes vs No Somewhat common; Prevents a common class of security exploits
Newer Mar, 2012 vs Oct, 1999 Release date over 12 years later
Significantly higher Maximum operating temperature 100 °C vs 82 °C More than 20% higher Maximum operating temperature
More l2 cache per core 0.5 MB/core vs 0.25 MB/core 2x more l2 cache per core
More threads 4 vs 1 3 more threads
More cores 2 vs 1 Twice as many cores; run more applications at once
Slightly lower typical power consumption 8.13W vs 12.84W More than 35% lower typical power consumption
Slightly lower annual home energy cost 2.41 $/year vs 3.81 $/year More than 35% lower annual home energy cost
Slightly lower annual commercial energy cost 8.76 $/year vs 13.84 $/year More than 35% lower annual commercial energy cost

Features Key features of the Pentium III 600EB  vs Atom D2550 

clock speed

Atom D2550
1.86 GHz

L2 cache

Specifications Full list of technical specs

summary

Pentium III 600EB  vs
Atom D2550 
Clock speed 0.6 GHz 1.86 GHz
Cores Single core Dual core

features

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

bus

Architecture FSB DMI
Number of links 1 1

details

Pentium III 600EB  vs
Atom D2550 
Architecture x86 x86-64
Threads 1 4
L2 cache 0.25 MB 1 MB
L2 cache per core 0.25 MB/core 0.5 MB/core
Manufacture process 180 nm 32 nm
Max CPUs 2 1
Operating temperature Unknown - 82°C Unknown - 100°C

integrated graphics

GPU None GPU
Label N/A Integrated
Number of displays supported N/A 2
GPU clock speed N/A 640 MHz

power consumption

TDP 15.8W 10W
Annual home energy cost 3.81 $/year 2.41 $/year
Annual commercial energy cost 13.84 $/year 8.76 $/year
Typical power consumption 12.84W 8.13W
Intel Pentium III 600EB
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Intel Atom D2550
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