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Differences What are the advantages of each

Front view of Intel Core2 Duo E8400

Reasons to consider the
Intel Core2 Duo E8400

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Much more l2 cache 6 MB vs 1 MB 6x 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
Much higher clock speed 3 GHz vs 1.6 GHz More than 85% 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 more l2 cache per core 3 MB/core vs 1 MB/core 3x more l2 cache per core
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 better overclocked clock speed (Air) 4.22 GHz vs 2.13 GHz Around 2x better overclocked clock speed (Air)
Supports trusted computing Yes vs No Somewhat common; Allows for safer, more reliable computing
Much better overclocked clock speed (Water) 4.23 GHz vs 1.6 GHz Around 2.8x better overclocked clock speed (Water)
More cores 2 vs 1 Twice as many cores; run more applications at once
Front view of Intel Celeron M 380

Reasons to consider the
Intel Celeron M 380

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Much lower typical power consumption 17.06W vs 52.81W 3.1x lower typical power consumption
Much lower annual home energy cost 5.06 $/year vs 15.66 $/year 3.1x lower annual home energy cost
Much lower annual commercial energy cost 18.4 $/year vs 56.94 $/year 3.1x lower annual commercial energy cost

Features Key features of the Core2 Duo E8400  vs Celeron M 380 

clock speed

L2 cache

overclocked clock speed (air)

Core2 Duo E8400
4.22 GHz
Celeron M 380
2.13 GHz

overclocked clock speed (water)

Core2 Duo E8400
4.23 GHz
Celeron M 380
1.6 GHz

Specifications Full list of technical specs

summary

Core2 Duo E8400  vs
Celeron M 380 
Clock speed 3 GHz 1.6 GHz
Cores Dual core Single core
Socket type
LGA 775
479

features

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

power consumption

TDP 65W 21W
Annual home energy cost 15.66 $/year 5.06 $/year
Annual commercial energy cost 56.94 $/year 18.4 $/year
Typical power consumption 52.81W 17.06W

bus

Architecture FSB FSB
Number of links 1 1
Clock speed 1,333 MHz 400 MHz

details

Core2 Duo E8400  vs
Celeron M 380 
Architecture x86-64 x86
Threads 2 1
L2 cache 6 MB 1 MB
L2 cache per core 3 MB/core 1 MB/core
Manufacture process 45 nm 90 nm
Transistor count 410,000,000 144,000,000
Max CPUs 1 1
Clock multiplier 9 16
Voltage range 0.85 - 1.36V 1 - 1.29V

overclocking

Overclocked clock speed 4.22 GHz 2.13 GHz
Overclocked clock speed (Water) 4.23 GHz 1.6 GHz
Overclocked clock speed (Air) 4.22 GHz 2.13 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 Core2 Duo E8400
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Intel Celeron M 380
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