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Differences What are the advantages of each

Front view of Intel Pentium III 800EB

Reasons to consider the
Intel Pentium III 800EB

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Supports more CPUs in SMP configuration 2 vs 1 Twice as many CPUs in SMP configuration
Front view of Intel Celeron B800

Reasons to consider the
Intel Celeron B800

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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
Higher clock speed 1.5 GHz vs 0.8 GHz More than 85% higher clock speed
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 NX bit Yes vs No Somewhat common; Prevents a common class of security exploits
Newer Apr, 2011 vs Dec, 1999 Release date over 11 years later
More l2 cache per core 0.5 MB/core vs 0.25 MB/core 2x more l2 cache per core
More cores 2 vs 1 Twice as many cores; run more applications at once

Features Key features of the Pentium III 800EB  vs Celeron B800 

clock speed

L2 cache

Specifications Full list of technical specs

summary

Pentium III 800EB  vs
Celeron B800 
Clock speed 0.8 GHz 1.5 GHz
Cores Single core Dual core
Socket type
370
rPGA 988B

features

Has a NX bit No Yes
Instruction set extensions
SSE2
MMX
SSE4
SSE3
SSE
SSE4.1
SSE4.2
Supplemental SSE3

details

Pentium III 800EB  vs
Celeron B800 
Threads 1 2
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

power consumption

Typical power consumption N/A 28.44W
Intel Pentium III 800EB
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Intel Celeron B800
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