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Differences What are the advantages of each

Front view of Intel Pentium D 820

Reasons to consider the
Intel Pentium D 820

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Much higher clock speed 2.8 GHz vs 1.6 GHz Around 75% higher clock speed
Much better overclocked clock speed (Air) 3.52 GHz vs 1.6 GHz Around 2.2x better overclocked clock speed (Air)
Much better overclocked clock speed (Water) 4.25 GHz vs 1.6 GHz Around 2.8x better overclocked clock speed (Water)
Front view of Intel Core2 Duo E4200

Reasons to consider the
Intel Core2 Duo E4200

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Much newer manufacturing process 65 nm vs 90 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
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

Features Key features of the Pentium D 820  vs Core2 Duo E4200 

clock speed

Pentium D 820
2.8 GHz
Core2 Duo E4200
1.6 GHz

L2 cache

overclocked clock speed (air)

Pentium D 820
3.52 GHz
Core2 Duo E4200
1.6 GHz

overclocked clock speed (water)

Pentium D 820
4.25 GHz
Core2 Duo E4200
1.6 GHz

Specifications Full list of technical specs

summary

Pentium D 820  vs
Core2 Duo E4200 
Clock speed 2.8 GHz 1.6 GHz
Cores Dual core Dual core
Socket type
LGA 775

features

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

bus

Clock speed 800 MHz 800 MHz

details

Pentium D 820  vs
Core2 Duo E4200 
Threads 2 2
L2 cache 2 MB 2 MB
L2 cache per core 1 MB/core 1 MB/core
Manufacture process 90 nm 65 nm
Max CPUs 1 1

overclocking

Overclocked clock speed 3.52 GHz 1.6 GHz
Overclocked clock speed (Water) 4.25 GHz 1.6 GHz
Overclocked clock speed (Air) 3.52 GHz 1.6 GHz

power consumption

Typical power consumption 77.19W N/A
Intel Pentium D 820
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Intel Core2 Duo E4200
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