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Intel Core2 Duo E8400

Front view of Intel Core2 Duo E8400
Front view of Intel Core2 Duo E6400

Intel Core2 Duo E6400

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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 higher clock speed 3 GHz vs 2.13 GHz More than 40% higher clock speed
Much better PassMark score 2,160 vs 1,295 More than 65% better PassMark score
Much better geekbench 2 (32-bit) score 2,826 vs 1,961 Around 45% better geekbench 2 (32-bit) score
Much newer manufacturing process 45 nm vs 65 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Much better overclocked clock speed (Air) 4.22 GHz vs 3.33 GHz More than 25% better overclocked clock speed (Air)
Supports trusted computing Yes vs No Somewhat common; Allows for safer, more reliable computing
Much higher Maximum operating temperature 72.4 °C vs 61.4 °C Around 20% higher Maximum operating temperature
Much better overclocked clock speed (Water) 4.23 GHz vs 3.33 GHz More than 25% better overclocked clock speed (Water)
Newer Jan, 2008 vs Jul, 2006 Release date over 1 years later
Front view of Intel Core2 Duo E6400

Reasons to consider the
Intel Core2 Duo E6400

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CPUBoss is not aware of any important advantages of the E6400 vs the E8400.

Benchmarks Real world tests of Core2 Duo E8400 vs E6400

GeekBench 3 (Multi-core) Data courtesy Primate Labs

Core2 Duo E8400
2,982
Core2 Duo E6400
2,071

GeekBench 3 (Single core) Data courtesy Primate Labs

Core2 Duo E8400
1,625
Core2 Duo E6400
1,133

GeekBench 3 (AES single core) Data courtesy Primate Labs

Core2 Duo E8400
128,000 MB/s
Core2 Duo E6400
91,000 MB/s

GeekBench (32-bit) Data courtesy Primate Labs

Core2 Duo E8400
2,826
Core2 Duo E6400
1,961

GeekBench (64-bit) Data courtesy Primate Labs

Core2 Duo E8400
3,092
Core2 Duo E6400
2,126

GeekBench

Core2 Duo E8400
4,794
Core2 Duo E6400
3,267

PassMark Data courtesy Passmark

Core2 Duo E8400
2,160
Core2 Duo E6400
1,295

PassMark (Single Core)

Core2 Duo E8400
1,251
Core2 Duo E6400
801

Specifications Full list of technical specs

summary

 Core2 Duo E8400  vs
E6400 
Clock speed 3 GHz 2.13 GHz
Cores Dual core Dual core
Socket type
LGA 775

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

power consumption
TDP 65W 65W
Annual home energy cost 15.66 $/year 15.66 $/year
Annual commercial energy cost 56.94 $/year 56.94 $/year
Performance per watt 1.83 pt/W 1.35 pt/W
Typical power consumption 52.81W 52.81W

bus
Architecture FSB FSB
Number of links 1 1
Clock speed 1,333 MHz 1,066 MHz

details

 Core2 Duo E8400  vs
E6400 
Architecture x86-64 x86-64
Threads 2 2
L2 cache 6 MB 2 MB
L2 cache per core 3 MB/core 1 MB/core
Manufacture process 45 nm 65 nm
Transistor count 410,000,000 167,000,000
Max CPUs 1 1
Clock multiplier 9 8
Voltage range 0.85 - 1.36V 0.85 - 1.5V
Operating temperature Unknown - 72.4°C Unknown - 61.4°C

overclocking
Overclock popularity 125 15
Overclocked clock speed 4.22 GHz 3.33 GHz
Overclocked clock speed (Water) 4.23 GHz 3.33 GHz
Overclocked clock speed (Air) 4.22 GHz 3.33 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 Core2 Duo E6400
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