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Differences What are the advantages of each

Front view of Intel Pentium N3540

Reasons to consider the
Intel Pentium N3540

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Much newer manufacturing process 22 nm vs 90 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Has a built-in GPU Yes vs No Somewhat common; A separate graphics adapter is not required
Much lower typical power consumption 6.09W vs 68.25W 11.2x lower typical power consumption
Has virtualization support Yes vs No Somewhat common; Boosts performance of virtual machines
Newer Jul, 2014 vs Jan, 2005 Release date over 9 years later
More cores 4 vs 1 3 more cores; run more applications at once
Much lower annual home energy cost 1.81 $/year vs 20.24 $/year 11.2x lower annual home energy cost
Much lower annual commercial energy cost 6.57 $/year vs 73.58 $/year 11.2x lower annual commercial energy cost
More threads 4 vs 2 Twice as many threads
Front view of Intel Pentium 4 640

Reasons to consider the
Intel Pentium 4 640

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Significantly higher clock speed 3.2 GHz vs 2.16 GHz Around 50% higher clock speed
Much more l2 cache per core 2 MB/core vs 0.5 MB/core 4x more l2 cache per core
Significantly better overclocked clock speed (Air) 3.92 GHz vs 2.65 GHz Around 50% better overclocked clock speed (Air)
Significantly better overclocked clock speed (Water) 3.2 GHz vs 2.17 GHz Around 50% better overclocked clock speed (Water)

Features Key features of the Pentium N3540  vs 4 640 

clock speed

Pentium N3540
2.16 GHz
Pentium 4 640
3.2 GHz

L2 cache

overclocked clock speed (air)

Pentium N3540
2.65 GHz
Pentium 4 640
3.92 GHz

overclocked clock speed (water)

Pentium N3540
2.17 GHz
Pentium 4 640
3.2 GHz

Specifications Full list of technical specs

summary

Pentium N3540  vs
4 640 
Clock speed 2.16 GHz 3.2 GHz
Cores Quad core Single core

features

Has a NX bit Yes Yes
Has virtualization support Yes No
Instruction set extensions
SSE2
MMX
SSE3
EM64T
SSE
AES
Supports dynamic frequency scaling Yes Yes

power consumption

TDP 7.5W 84W
Annual home energy cost 1.81 $/year 20.24 $/year
Annual commercial energy cost 6.57 $/year 73.58 $/year
Typical power consumption 6.09W 68.25W

details

Pentium N3540  vs
4 640 
Architecture x86-64 x86-64
Threads 4 2
L2 cache 2 MB 2 MB
L2 cache per core 0.5 MB/core 2 MB/core
Manufacture process 22 nm 90 nm
Max CPUs 1 1

overclocking

Overclocked clock speed 2.65 GHz 3.92 GHz
Overclocked clock speed (Water) 2.17 GHz 3.2 GHz
Overclocked clock speed (Air) 2.65 GHz 3.92 GHz

integrated graphics

GPU GPU None
Label Intel® HD Graphics N/A
Number of displays supported 2 N/A
GPU clock speed 313 MHz N/A
Turbo clock speed 896 MHz N/A

bus

Architecture FSB FSB
Number of links 1 1
Intel Pentium N3540
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Intel Pentium 4 640
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