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Differences What are the advantages of each

Front view of Intel Pentium 4 651

Reasons to consider the
Intel Pentium 4 651

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Much higher clock speed 3.4 GHz vs 2.66 GHz Around 30% higher clock speed
Much better overclocked clock speed (Air) 4.72 GHz vs 3.67 GHz Around 30% better overclocked clock speed (Air)
Much better overclocked clock speed (Water) 5.41 GHz vs 3.72 GHz More than 45% better overclocked clock speed (Water)
Front view of Intel Core2 Duo E6750

Reasons to consider the
Intel Core2 Duo E6750

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More cores 2 vs 1 Twice as many cores; run more applications at once
Has virtualization support Yes vs No Somewhat common; Boosts performance of virtual machines
Supports trusted computing Yes vs No Somewhat common; Allows for safer, more reliable computing
Significantly lower typical power consumption 52.81W vs 69.88W Around 25% lower typical power consumption
Higher Maximum operating temperature 72 °C vs 69.2 °C Around 5% higher Maximum operating temperature
Significantly lower annual home energy cost 15.66 $/year vs 20.72 $/year Around 25% lower annual home energy cost
Significantly lower annual commercial energy cost 56.94 $/year vs 75.34 $/year Around 25% lower annual commercial energy cost
Newer Jul, 2007 vs Apr, 2006 Release date over 1 years later

Features Key features of the Pentium 4 651  vs Core2 Duo E6750 

clock speed

Pentium 4 651
3.4 GHz
Core2 Duo E6750
2.66 GHz

L2 cache

overclocked clock speed (air)

Pentium 4 651
4.72 GHz
Core2 Duo E6750
3.67 GHz

overclocked clock speed (water)

Pentium 4 651
5.41 GHz
Core2 Duo E6750
3.72 GHz

Specifications Full list of technical specs

summary

Pentium 4 651  vs
Core2 Duo E6750 
Clock speed 3.4 GHz 2.66 GHz
Cores Single core Dual core
Socket type
LGA 775

features

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

power consumption

TDP 86W 65W
Annual home energy cost 20.72 $/year 15.66 $/year
Annual commercial energy cost 75.34 $/year 56.94 $/year
Typical power consumption 69.88W 52.81W

bus

Architecture FSB FSB
Number of links 1 1
Clock speed 800 MHz 1,333 MHz

details

Pentium 4 651  vs
Core2 Duo E6750 
Architecture x86-64 x86-64
Threads 2 2
L2 cache 2 MB 4 MB
L2 cache per core 2 MB/core 2 MB/core
Manufacture process 65 nm 65 nm
Transistor count 188,000,000 291,000,000
Max CPUs 1 1
Clock multiplier 17 8
Voltage range 1.2 - 1.34V 0.85 - 1.5V
Operating temperature Unknown - 69.2°C Unknown - 72°C

overclocking

Overclocked clock speed 4.72 GHz 3.67 GHz
Overclocked clock speed (Water) 5.41 GHz 3.72 GHz
Overclocked clock speed (Air) 4.72 GHz 3.67 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 4 651
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Intel Core2 Duo E6750
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