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Differences What are the advantages of each

Front view of Intel Pentium III 1BGHz

Reasons to consider the
Intel Pentium III 1BGHz

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Supports more CPUs in SMP configuration 2 vs 1 Twice as many CPUs in SMP configuration
Front view of Intel Core2 Duo T6500

Reasons to consider the
Intel Core2 Duo T6500

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Much newer manufacturing process 45 nm vs 180 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Much more l2 cache 2 MB vs 0.25 MB 8x more l2 cache; more data can be stored in the l2 cache for quick access later
Significantly higher clock speed 2.1 GHz vs 1 GHz More than 2x higher clock speed
Has a NX bit Yes vs No Somewhat common; Prevents a common class of security exploits
Much more l2 cache per core 1 MB/core vs 0.25 MB/core 4x more l2 cache per core
Newer Apr, 2009 vs Mar, 2000 Release date over 9 years later
More cores 2 vs 1 Twice as many cores; run more applications at once

Features Key features of the Pentium III 1BGHz  vs Core2 Duo T6500 

clock speed

L2 cache

Specifications Full list of technical specs

summary

Pentium III 1BGHz  vs
Core2 Duo T6500 
Clock speed 1 GHz 2.1 GHz
Cores Single core Dual core
Socket type
370
P

features

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

details

Pentium III 1BGHz  vs
Core2 Duo T6500 
Threads 1 2
L2 cache 0.25 MB 2 MB
L2 cache per core 0.25 MB/core 1 MB/core
Manufacture process 180 nm 45 nm
Max CPUs 2 1

power consumption

Typical power consumption N/A 28.44W

bus

Clock speed 133 MHz 800 MHz
Intel Pentium III 1BGHz
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Intel Core2 Duo T6500
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