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Differences What are the advantages of each

Front view of Intel Pentium D 925

Reasons to consider the
Intel Pentium D 925

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Much more l2 cache 4 MB vs 2 MB 2x more l2 cache; more data can be stored in the l2 cache for quick access later
Much higher Maximum operating temperature 63.4 °C vs 1 °C Around 63.5x higher Maximum operating temperature
More cores 2 vs 1 Twice as many cores; run more applications at once
Newer Jul, 2006 vs Jan, 2006 Release date 6 months later
Front view of Intel Pentium 4 661

Reasons to consider the
Intel Pentium 4 661

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Higher clock speed 3.6 GHz vs 3 GHz More than 20% higher clock speed
Lower typical power consumption 69.88W vs 77.19W Around 10% lower typical power consumption
Better overclocked clock speed (Air) 4.55 GHz vs 4.23 GHz Around 10% better overclocked clock speed (Air)
Better overclocked clock speed (Water) 5.04 GHz vs 4.4 GHz Around 15% better overclocked clock speed (Water)
Lower annual home energy cost 20.72 $/year vs 22.89 $/year Around 10% lower annual home energy cost
Lower annual commercial energy cost 75.34 $/year vs 83.22 $/year Around 10% lower annual commercial energy cost

Features Key features of the Pentium D 925  vs 4 661 

clock speed

L2 cache

overclocked clock speed (air)

Pentium D 925
4.23 GHz
Pentium 4 661
4.55 GHz

overclocked clock speed (water)

Pentium D 925
4.4 GHz
Pentium 4 661
5.04 GHz

Specifications Full list of technical specs

summary

Pentium D 925  vs
4 661 
Clock speed 3 GHz 3.6 GHz
Cores Dual core Single core
Socket type
LGA 775
P

features

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

power consumption

TDP 95W 86W
Annual home energy cost 22.89 $/year 20.72 $/year
Annual commercial energy cost 83.22 $/year 75.34 $/year
Typical power consumption 77.19W 69.88W

memory controller

Memory controller Built-in Built-in
Supports ECC No No

details

Pentium D 925  vs
4 661 
Architecture x86-64 x86-64
Threads 1 2
L2 cache 4 MB 2 MB
L2 cache per core 2 MB/core 2 MB/core
Manufacture process 65 nm 65 nm
Transistor count 376,000,000 188,000,000
Max CPUs 1 1
Clock multiplier 15 18
Voltage range 1.2 - 1.34V 1.2 - 1.34V
Operating temperature Unknown - 63.4°C Unknown - 1°C

overclocking

Overclocked clock speed 4.23 GHz 4.55 GHz
Overclocked clock speed (Water) 4.4 GHz 5.04 GHz
Overclocked clock speed (Air) 4.23 GHz 4.55 GHz

integrated graphics

GPU None None
Label N/A N/A
Latest DirectX N/A N/A
Number of displays supported N/A N/A
GPU clock speed N/A N/A
Turbo clock speed N/A N/A
3DMark06 N/A N/A

bus

Architecture FSB FSB
Number of links 1 1
Clock speed 800 MHz 800 MHz
Intel Pentium D 925
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Intel Pentium 4 661
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