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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 higher clock speed 3.4 GHz vs 2 GHz 70% higher clock speed
Much more l2 cache 4 MB vs 1 MB 4x more l2 cache; more data can be stored in the l2 cache for quick access later
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 better overclocked clock speed (Air) 4.22 GHz vs 3.57 GHz Around 20% better overclocked clock speed (Air)
Higher Maximum operating temperature 63.4 °C vs 60.4 °C Around 5% higher Maximum operating temperature
Much better overclocked clock speed (Water) 4.59 GHz vs 3.98 GHz More than 15% better overclocked clock speed (Water)
Front view of Intel Celeron M 440

Reasons to consider the
Intel Celeron M 440

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Much better performance per watt 1.7 pt/W vs 1.14 pt/W Around 50% better performance per watt
Much lower typical power consumption 28.44W vs 77.19W 2.7x lower typical power consumption
Much lower annual commercial energy cost 30.66 $/year vs 83.22 $/year 2.7x lower annual commercial energy cost
Much lower annual home energy cost 8.43 $/year vs 22.89 $/year 2.7x lower annual home energy cost

Benchmarks Real world tests of Pentium D 945 vs Celeron M 440

GeekBench 3 (Multi-core) Data courtesy Primate Labs

GeekBench 3 (Single core) Data courtesy Primate Labs

GeekBench 3 (AES single core) Data courtesy Primate Labs

Pentium D 945
122,800 MB/s
Celeron M 440
74,050 MB/s

GeekBench (32-bit) Data courtesy Primate Labs

GeekBench

Specifications Full list of technical specs

summary

Pentium D 945  vs
Celeron M 440 
Clock speed 3.4 GHz 2 GHz
Cores Dual core Single core
Socket type
LGA 775
479
M

features

Has a NX bit Yes Yes
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 35W
Annual home energy cost 22.89 $/year 8.43 $/year
Annual commercial energy cost 83.22 $/year 30.66 $/year
Performance per watt 1.14 pt/W 1.7 pt/W
Typical power consumption 77.19W 28.44W

memory controller

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

details

Pentium D 945  vs
Celeron M 440 
Architecture x86-64 x86-64
Threads 2 1
L2 cache 4 MB 1 MB
L2 cache per core 2 MB/core 1 MB/core
Manufacture process 65 nm 65 nm
Transistor count 376,000,000 105,000,000
Max CPUs 1 1
Clock multiplier 17 10
Voltage range 1.2 - 1.34V 1 - 1.34V
Operating temperature Unknown - 63.4°C Unknown - 60.4°C

overclocking

Overclocked clock speed 4.22 GHz 3.57 GHz
Overclocked clock speed (Water) 4.59 GHz 3.98 GHz
PassMark (Overclocked) 1,049.4 1,585.7
Overclocked clock speed (Air) 4.22 GHz 3.57 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 945
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Intel Celeron M 440
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