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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 0.5 MB 12x more l2 cache; more data can be stored in the l2 cache for quick access later
Much more l2 cache per core 3 MB/core vs 0.25 MB/core 12x more l2 cache per core
Supports trusted computing Yes vs No Somewhat common; Allows for safer, more reliable computing
Lower typical power consumption 52.81W vs 59.31W More than 10% lower typical power consumption
Much better overclocked clock speed (Water) 4.23 GHz vs 3.2 GHz More than 30% better overclocked clock speed (Water)
Lower annual commercial energy cost 56.94 $/year vs 63.95 $/year More than 10% lower annual commercial energy cost
Lower annual home energy cost 15.66 $/year vs 17.59 $/year More than 10% lower annual home energy cost
Front view of Intel Core i3 550

Reasons to consider the
Intel Core i3 550

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Has a built-in GPU Yes vs No Somewhat common; A separate graphics adapter is not required
Much newer manufacturing process 32 nm vs 45 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
More threads 4 vs 2 Twice as many threads
Higher clock speed 3.2 GHz vs 3 GHz More than 5% higher clock speed
Much better overclocked clock speed (Air) 4.54 GHz vs 4.22 GHz More than 5% better overclocked clock speed (Air)
Newer Apr, 2010 vs Jan, 2008 Release date over 2 years later

Benchmarks Real world tests of Core2 Duo E8400 vs Core i3 550

GeekBench 3 (Multi-core) Data courtesy Primate Labs

GeekBench 3 (Single core) Data courtesy Primate Labs

GeekBench 3 (AES single core) Data courtesy Primate Labs

Core2 Duo E8400
128,000 MB/s
Core i3 550
128,500 MB/s

GeekBench (32-bit) Data courtesy Primate Labs

GeekBench (64-bit) Data courtesy Primate Labs

GeekBench

PassMark Data courtesy Passmark

PassMark (Single Core)

Reviews Word on the street

Specifications Full list of technical specs

summary

Core2 Duo E8400  vs
Core i3 550 
Clock speed 3 GHz 3.2 GHz
Cores Dual core Dual core
Socket type
LGA 775
LGA 1156

features

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

integrated graphics

GPU None GPU
Label N/A Intel® HD Graphics
Number of displays supported N/A 2
GPU clock speed N/A 733 MHz

bus

Architecture FSB DMI
Number of links 1 1

details

Core2 Duo E8400  vs
Core i3 550 
Architecture x86-64 x86-64
Threads 2 4
L2 cache 6 MB 0.5 MB
L2 cache per core 3 MB/core 0.25 MB/core
Manufacture process 45 nm 32 nm
Transistor count 410,000,000 382,000,000
Max CPUs 1 1
Clock multiplier 9 24
Voltage range 0.85 - 1.36V 0.65 - 1.4V
Operating temperature Unknown - 72.4°C Unknown - 72.6°C

overclocking

Overclock popularity 125 17
Overclock review score 4.5 2
Overclocked clock speed 4.22 GHz 4.54 GHz
Overclocked clock speed (Water) 4.23 GHz 3.2 GHz
Overclocked clock speed (Air) 4.22 GHz 4.54 GHz

power consumption

TDP 65W 73W
Annual home energy cost 15.66 $/year 17.59 $/year
Annual commercial energy cost 56.94 $/year 63.95 $/year
Performance per watt 1.83 pt/W 1.98 pt/W
Typical power consumption 52.81W 59.31W
Intel Core2 Duo E8400
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Intel Core i3 550
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