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Intel Pentium E5400

Front view of Intel Pentium E5400
Front view of Intel Pentium 4 521

Intel Pentium 4 521

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Differences What are the advantages of each

Front view of Intel Pentium E5400

Reasons to consider the
Intel Pentium E5400

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Much 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 newer manufacturing process 45 nm vs 90 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
More cores 2 vs 1 Twice as many cores; run more applications at once
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
Significantly lower typical power consumption 52.81W vs 68.25W Around 25% lower typical power consumption
Much higher Maximum operating temperature 74.1 °C vs 67.7 °C Around 10% higher Maximum operating temperature
Newer Jan, 2009 vs Jul, 2005 Release date over 3 years later
Significantly lower annual home energy cost 15.66 $/year vs 20.24 $/year Around 25% lower annual home energy cost
Significantly lower annual commercial energy cost 56.94 $/year vs 73.58 $/year Around 25% lower annual commercial energy cost
Better overclocked clock speed (Water) 4.49 GHz vs 4.28 GHz More than 5% better overclocked clock speed (Water)
Front view of Intel Pentium 4 521

Reasons to consider the
Intel Pentium 4 521

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Higher clock speed 2.8 GHz vs 2.7 GHz Around 5% higher clock speed

Features Key features of the Pentium E5400  vs 4 521 

clock speed

Pentium E5400
2.7 GHz
Pentium 4 521
2.8 GHz

L2 cache

Pentium E5400
2 MB
Pentium 4 521
1 MB

overclocked clock speed (air)

Pentium E5400
3.75 GHz
Pentium 4 521
3.72 GHz

overclocked clock speed (water)

Pentium E5400
4.49 GHz
Pentium 4 521
4.28 GHz

TDP

Pentium E5400
65W
Pentium 4 521
84W

Specifications Full list of technical specs

summary

 Pentium E5400  vs
4 521 
Clock speed 2.7 GHz 2.8 GHz
Cores Dual core Single core
Socket type
LGA 775

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

power consumption
TDP 65W 84W
Annual home energy cost 15.66 $/year 20.24 $/year
Annual commercial energy cost 56.94 $/year 73.58 $/year
Typical power consumption 52.81W 68.25W

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

details

 Pentium E5400  vs
4 521 
Architecture x86-64 x86-64
Threads 2 2
L2 cache 2 MB 1 MB
L2 cache per core 1 MB/core 1 MB/core
Manufacture process 45 nm 90 nm
Transistor count 228,000,000 125,000,000
Max CPUs 1 1
Clock multiplier 13 14
Voltage range 0.85 - 1.36V 1.2 - 1.43V
Operating temperature Unknown - 74.1°C Unknown - 67.7°C

overclocking
Overclocked clock speed 3.75 GHz 3.72 GHz
Overclocked clock speed (Water) 4.49 GHz 4.28 GHz
Overclocked clock speed (Air) 3.75 GHz 3.72 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 E5400
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Intel Pentium 4 521
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