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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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CPUBoss is not aware of any important advantages of the 945 vs the 940.

Front view of Intel Pentium D 940

Reasons to consider the
Intel Pentium D 940

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Has virtualization support Yes vs No Somewhat common; Boosts performance of virtual machines

Features Key features of the Pentium D 945  vs 940 

clock speed

Pentium D 945
3.4 GHz
Pentium D 940
3.2 GHz

L2 cache

overclocked clock speed (air)

Pentium D 945
4.22 GHz
Pentium D 940
4.25 GHz

overclocked clock speed (water)

Pentium D 945
4.59 GHz
Pentium D 940
4.6 GHz

Specifications Full list of technical specs

summary

Pentium D 945  vs
940 
Clock speed 3.4 GHz 3.2 GHz
Cores Dual core Dual core
Socket type
LGA 775

features

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

power consumption

TDP 95W 130W
Annual home energy cost 22.89 $/year 31.32 $/year
Annual commercial energy cost 83.22 $/year 113.88 $/year
Performance per watt 1.14 pt/W 0.44 pt/W
Typical power consumption 77.19W 105.63W

memory controller

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

details

Pentium D 945  vs
940 
Architecture x86-64 x86-64
Threads 2 2
L2 cache 4 MB 4 MB
L2 cache per core 2 MB/core 2 MB/core
Manufacture process 65 nm 65 nm
Transistor count 376,000,000 376,000,000
Max CPUs 1 1
Clock multiplier 17 16
Voltage range 1.2 - 1.34V 1.2 - 1.34V
Operating temperature Unknown - 63.4°C Unknown - 68.6°C

overclocking

Overclocked clock speed 4.22 GHz 4.25 GHz
Overclocked clock speed (Water) 4.59 GHz 4.6 GHz
Overclocked clock speed (Air) 4.22 GHz 4.25 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 Pentium D 940
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