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Differences What are the advantages of each

Front view of Intel Pentium D 945

Reasons to consider the
Intel Pentium D 945

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Much more l2 cache 4 MB vs 0.25 MB 16x more l2 cache; more data can be stored in the l2 cache for quick access later
Much higher clock speed 3.4 GHz vs 2.66 GHz Around 30% higher clock speed
Much newer manufacturing process 65 nm vs 90 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
More advanced architecture x86-64 vs x86 A 64-bit architecture allows more RAM to be installed and accessed by the processor
More cores 2 vs 1 Twice as many cores; run more applications at once
More threads 2 vs 1 Twice as many threads
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
Much more l2 cache per core 2 MB/core vs 0.25 MB/core 8x more l2 cache per core
Has a NX bit Yes vs No Somewhat common; Prevents a common class of security exploits
Much better overclocked clock speed (Air) 4.22 GHz vs 3.53 GHz Around 20% better overclocked clock speed (Air)
Much better overclocked clock speed (Water) 4.59 GHz vs 3.9 GHz Around 20% better overclocked clock speed (Water)
Newer Jul, 2006 vs Jun, 2004 Release date over 2 years later
Front view of Intel Celeron D 330

Reasons to consider the
Intel Celeron D 330

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Significantly lower typical power consumption 59.31W vs 77.19W Around 25% lower typical power consumption
Significantly higher Maximum operating temperature 67 °C vs 63.4 °C More than 5% higher Maximum operating temperature
Significantly lower annual home energy cost 17.59 $/year vs 22.89 $/year Around 25% lower annual home energy cost
Significantly lower annual commercial energy cost 63.95 $/year vs 83.22 $/year Around 25% lower annual commercial energy cost

Features Key features of the Pentium D 945  vs Celeron D 330 

clock speed

Pentium D 945
3.4 GHz
Celeron D 330
2.66 GHz

L2 cache

overclocked clock speed (air)

Pentium D 945
4.22 GHz
Celeron D 330
3.53 GHz

overclocked clock speed (water)

Pentium D 945
4.59 GHz
Celeron D 330
3.9 GHz

Specifications Full list of technical specs

summary

Pentium D 945  vs
Celeron D 330 
Clock speed 3.4 GHz 2.66 GHz
Cores Dual core Single core
Socket type
LGA 775
478

features

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

power consumption

TDP 95W 73W
Annual home energy cost 22.89 $/year 17.59 $/year
Annual commercial energy cost 83.22 $/year 63.95 $/year
Typical power consumption 77.19W 59.31W

memory controller

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

details

Pentium D 945  vs
Celeron D 330 
Architecture x86-64 x86
Threads 2 1
L2 cache 4 MB 0.25 MB
L2 cache per core 2 MB/core 0.25 MB/core
Manufacture process 65 nm 90 nm
Transistor count 376,000,000 125,000,000
Max CPUs 1 1
Clock multiplier 17 20
Voltage range 1.2 - 1.34V 1.25 - 1.4V
Operating temperature Unknown - 63.4°C Unknown - 67°C

overclocking

Overclocked clock speed 4.22 GHz 3.53 GHz
Overclocked clock speed (Water) 4.59 GHz 3.9 GHz
PassMark (Overclocked) 1,049.4 515.5
Overclocked clock speed (Air) 4.22 GHz 3.53 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 533 MHz
Intel Pentium D 945
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Intel Celeron D 330
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