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Differences What are the advantages of each

Front view of Intel Pentium 4 521

Reasons to consider the
Intel Pentium 4 521

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Much higher clock speed 2.8 GHz vs 1.2 GHz More than 2.2x higher clock speed
More advanced architecture x86-64 vs x86 A 64-bit architecture allows more RAM to be installed and accessed by the processor
Much better overclocked clock speed (Air) 3.72 GHz vs 1.57 GHz More than 2.2x better overclocked clock speed (Air)
Much better overclocked clock speed (Water) 4.28 GHz vs 1.2 GHz More than 3.5x better overclocked clock speed (Water)
Front view of Intel Core Solo U1400

Reasons to consider the
Intel Core Solo U1400

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Much newer manufacturing process 65 nm vs 90 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Significantly more l2 cache 2 MB vs 1 MB 2x more l2 cache; more data can be stored in the l2 cache for quick access later
Much lower typical power consumption 4.88W vs 68.25W 14x lower typical power consumption
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
Has virtualization support Yes vs No Somewhat common; Boosts performance of virtual machines
Much more l2 cache per core 2 MB/core vs 1 MB/core 2x more l2 cache per core
Much lower annual home energy cost 1.45 $/year vs 20.24 $/year 14x lower annual home energy cost
Much lower annual commercial energy cost 5.26 $/year vs 73.58 $/year 14x lower annual commercial energy cost
Newer Apr, 2006 vs Jul, 2005 Release date 9 months later

Features Key features of the Pentium 4 521  vs Core Solo U1400 

clock speed

Pentium 4 521
2.8 GHz
Core Solo U1400
1.2 GHz

L2 cache

overclocked clock speed (air)

Pentium 4 521
3.72 GHz
Core Solo U1400
1.57 GHz

overclocked clock speed (water)

Pentium 4 521
4.28 GHz
Core Solo U1400
1.2 GHz

Specifications Full list of technical specs

summary

Pentium 4 521  vs
Core Solo U1400 
Clock speed 2.8 GHz 1.2 GHz
Cores Single core Single core
Socket type
LGA 775
479

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 No Yes

power consumption

TDP 84W 6W
Annual home energy cost 20.24 $/year 1.45 $/year
Annual commercial energy cost 73.58 $/year 5.26 $/year
Typical power consumption 68.25W 4.88W

bus

Architecture FSB FSB
Number of links 1 1
Clock speed 800 MHz 533 MHz

details

Pentium 4 521  vs
Core Solo U1400 
Architecture x86-64 x86
Threads 2 1
L2 cache 1 MB 2 MB
L2 cache per core 1 MB/core 2 MB/core
Manufacture process 90 nm 65 nm
Transistor count 125,000,000 151,000,000
Max CPUs 1 1
Clock multiplier 14 9
Voltage range 1.2 - 1.43V 0.85 - 1.1V

overclocking

Overclocked clock speed 3.72 GHz 1.57 GHz
Overclocked clock speed (Water) 4.28 GHz 1.2 GHz
Overclocked clock speed (Air) 3.72 GHz 1.57 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
Intel Pentium 4 521
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Intel Core Solo U1400
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