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Differences What are the advantages of each

Front view of Intel Pentium 4 620

Reasons to consider the
Intel Pentium 4 620

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Much higher clock speed 2.8 GHz vs 1.3 GHz Around 2.2x higher clock speed
Much more l2 cache 2 MB vs 0.25 MB 8x more l2 cache; more data can be stored in the l2 cache for quick access later
Much more l2 cache per core 2 MB/core vs 0.25 MB/core 8x more l2 cache per core
Much better overclocked clock speed (Air) 3.33 GHz vs 1.3 GHz More than 2.5x better overclocked clock speed (Air)
Much better overclocked clock speed (Water) 2.8 GHz vs 1.3 GHz Around 2.2x better overclocked clock speed (Water)
Front view of Intel Celeron 787

Reasons to consider the
Intel Celeron 787

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Much newer manufacturing process 32 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 13.81W vs 68.25W 4.9x 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 higher Maximum operating temperature 100 °C vs 67.7 °C Around 50% higher Maximum operating temperature
Much lower annual home energy cost 4.1 $/year vs 20.24 $/year 4.9x lower annual home energy cost
Much lower annual commercial energy cost 14.89 $/year vs 73.58 $/year 4.9x lower annual commercial energy cost

Features Key features of the Pentium 4 620  vs Celeron 787 

clock speed

Pentium 4 620
2.8 GHz
Celeron 787
1.3 GHz

L2 cache

Celeron 787
0.25 MB

overclocked clock speed (air)

Pentium 4 620
3.33 GHz
Celeron 787
1.3 GHz

overclocked clock speed (water)

Pentium 4 620
2.8 GHz
Celeron 787
1.3 GHz

Specifications Full list of technical specs

summary

Pentium 4 620  vs
Celeron 787 
Clock speed 2.8 GHz 1.3 GHz
Cores Single core Single core
Socket type
LGA 775
BGA 1023

features

Has a NX bit Yes Yes
Has virtualization support No Yes
Instruction set extensions
SSE2
MMX
SSE4
SSE3
SSE
SSE4.1
SSE4.2
Supplemental SSE3
Supports dynamic frequency scaling No Yes

power consumption

TDP 84W 17W
Annual home energy cost 20.24 $/year 4.1 $/year
Annual commercial energy cost 73.58 $/year 14.89 $/year
Typical power consumption 68.25W 13.81W

details

Pentium 4 620  vs
Celeron 787 
Architecture x86-64 x86-64
Threads 2 1
L2 cache 2 MB 0.25 MB
L2 cache per core 2 MB/core 0.25 MB/core
Manufacture process 90 nm 32 nm
Max CPUs 1 1
Clock multiplier 14 13
Operating temperature Unknown - 67.7°C Unknown - 100°C

overclocking

Overclocked clock speed 3.33 GHz 1.3 GHz
Overclocked clock speed (Water) 2.8 GHz 1.3 GHz
Overclocked clock speed (Air) 3.33 GHz 1.3 GHz

integrated graphics

GPU None GPU
Label N/A Intel® HD Graphics
Number of displays supported N/A 2
GPU clock speed N/A 350 MHz
Turbo clock speed N/A 950 MHz

bus

Architecture FSB DMI
Number of links 1 1
Intel Pentium 4 620
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Intel Celeron 787
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