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Differences What are the advantages of each

Front view of Intel Pentium E2140

Reasons to consider the
Intel Pentium E2140

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Much lower typical power consumption 52.81W vs 105.63W 2x lower typical power consumption
Much lower annual commercial energy cost 56.94 $/year vs 113.88 $/year 2x lower annual commercial energy cost
Much lower annual home energy cost 15.66 $/year vs 31.32 $/year 2x lower annual home energy cost
Newer Apr, 2007 vs Jan, 2006 Release date over 1 years later
Front view of Intel Pentium D 940

Reasons to consider the
Intel Pentium D 940

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Much higher clock speed 3.2 GHz vs 1.6 GHz 2x 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
Much better overclocked clock speed (Air) 4.25 GHz vs 3 GHz More than 40% better overclocked clock speed (Air)
Has virtualization support Yes vs No Somewhat common; Boosts performance of virtual machines
Much more l2 cache per core 2 MB/core vs 0.5 MB/core 4x more l2 cache per core
Much higher Maximum operating temperature 68.6 °C vs 61.4 °C More than 10% higher Maximum operating temperature
Much better overclocked clock speed (Water) 4.6 GHz vs 3.06 GHz More than 50% better overclocked clock speed (Water)

Benchmarks Real world tests of Pentium E2140 vs D 940

PassMark Data courtesy Passmark

PassMark (Single Core)

Specifications Full list of technical specs

summary

Pentium E2140  vs
D 940 
Clock speed 1.6 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
SSE2
MMX
SSE3
SSE
Supplemental SSE3
Supports dynamic frequency scaling Yes Yes

power consumption

TDP 65W 130W
Annual home energy cost 15.66 $/year 31.32 $/year
Annual commercial energy cost 56.94 $/year 113.88 $/year
Performance per watt 0.99 pt/W 0.44 pt/W
Typical power consumption 52.81W 105.63W

bus

Architecture FSB FSB
Number of links 1 1
Clock speed 800 MHz 800 MHz

details

Pentium E2140  vs
D 940 
Architecture x86-64 x86-64
Threads 2 2
L2 cache 1 MB 4 MB
L2 cache per core 0.5 MB/core 2 MB/core
Manufacture process 65 nm 65 nm
Transistor count 105,000,000 376,000,000
Max CPUs 1 1
Clock multiplier 8 16
Voltage range 0.85 - 1.5V 1.2 - 1.34V
Operating temperature Unknown - 61.4°C Unknown - 68.6°C

overclocking

Overclocked clock speed 3 GHz 4.25 GHz
Overclocked clock speed (Water) 3.06 GHz 4.6 GHz
Overclocked clock speed (Air) 3 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
Intel Pentium E2140
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Intel Pentium D 940
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