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Differences What are the advantages of each

Front view of Intel Pentium D 920

Reasons to consider the
Intel Pentium D 920

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Much higher clock speed 2.8 GHz vs 2.13 GHz More than 30% higher clock speed
Much better overclocked clock speed (Air) 3.75 GHz vs 3.33 GHz Around 15% better overclocked clock speed (Air)
Higher Maximum operating temperature 63.4 °C vs 61.4 °C Around 5% higher Maximum operating temperature
Front view of Intel Core2 Duo E6400

Reasons to consider the
Intel Core2 Duo E6400

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Has virtualization support Yes vs No Somewhat common; Boosts performance of virtual machines
Much lower typical power consumption 52.81W vs 77.19W More than 30% lower typical power consumption
Significantly lower annual home energy cost 15.66 $/year vs 22.89 $/year More than 30% lower annual home energy cost
Significantly lower annual commercial energy cost 56.94 $/year vs 83.22 $/year More than 30% lower annual commercial energy cost
Significantly better overclocked clock speed (Water) 3.33 GHz vs 2.8 GHz Around 20% better overclocked clock speed (Water)

Features Key features of the Pentium D 920  vs Core2 Duo E6400 

clock speed

Pentium D 920
2.8 GHz
Core2 Duo E6400
2.13 GHz

L2 cache

overclocked clock speed (air)

Pentium D 920
3.75 GHz
Core2 Duo E6400
3.33 GHz

overclocked clock speed (water)

Pentium D 920
2.8 GHz
Core2 Duo E6400
3.33 GHz

Specifications Full list of technical specs

summary

Pentium D 920  vs
Core2 Duo E6400 
Clock speed 2.8 GHz 2.13 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 95W 65W
Annual home energy cost 22.89 $/year 15.66 $/year
Annual commercial energy cost 83.22 $/year 56.94 $/year
Typical power consumption 77.19W 52.81W

bus

Architecture FSB FSB
Number of links 1 1
Clock speed 800 MHz 1,066 MHz

details

Pentium D 920  vs
Core2 Duo E6400 
Architecture x86-64 x86-64
Threads 2 2
L2 cache 4 MB 2 MB
L2 cache per core 2 MB/core 1 MB/core
Manufacture process 65 nm 65 nm
Transistor count 376,000,000 167,000,000
Max CPUs 1 1
Clock multiplier 14 8
Voltage range 1.2 - 1.34V 0.85 - 1.5V
Operating temperature Unknown - 63.4°C Unknown - 61.4°C

overclocking

Overclocked clock speed 3.75 GHz 3.33 GHz
Overclocked clock speed (Water) 2.8 GHz 3.33 GHz
Overclocked clock speed (Air) 3.75 GHz 3.33 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 D 920
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Intel Core2 Duo E6400
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