CPUBoss Review Our evaluation of E6400 vs 6400+ among desktop CPUs

Performance

Benchmark performance using all cores

PCMark 8 Home 3.0 Accelerated, PassMark and 1 more

Single-core Performance

Individual core benchmark performance

PassMark (Single Core), Geekbench 3 Single Core and 1 more

Integrated Graphics

Integrated GPU performance for graphics

Fire Strike

Integrated Graphics (OpenCL)

Integrated GPU performance for parallel computing

CompuBench 1.5 Bitcoin mining and 4 more

Performance per Watt

How efficiently does the processor use electricity?

Fire Strike, CompuBench 1.5 Bitcoin mining and 11 more

Value

Are you paying a premium for performance?

Fire Strike, CompuBench 1.5 Bitcoin mining and 11 more

No winner declared

Too close to call

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VS

Differences What are the advantages of each

Front view of Intel Core2 Duo E6400

Reasons to consider the
Intel Core2 Duo E6400

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Much newer manufacturing process 65 nm vs 90 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Much better performance per watt 1.35 pt/W vs 0.56 pt/W Around 2.5x better performance per watt
Much lower typical power consumption 52.81W vs 101.56W Around 50% lower typical power consumption
Much higher Maximum operating temperature 61.4 °C vs 55 °C More than 10% higher Maximum operating temperature
Much lower annual home energy cost 15.66 $/year vs 30.11 $/year Around 50% lower annual home energy cost
Much lower annual commercial energy cost 56.94 $/year vs 109.5 $/year Around 50% lower annual commercial energy cost
Front view of AMD Athlon X2 6400+

Reasons to consider the
AMD Athlon X2 6400+

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Much higher clock speed 3.2 GHz vs 2.13 GHz More than 50% higher clock speed
Much better PassMark score 1,795 vs 1,295 Around 40% better PassMark score
Better overclocked clock speed (Air) 3.42 GHz vs 3.33 GHz Around 5% better overclocked clock speed (Air)
Better overclocked clock speed (Water) 3.53 GHz vs 3.33 GHz More than 5% better overclocked clock speed (Water)

Benchmarks Real world tests of Core2 Duo E6400 vs Athlon X2 6400+

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 E6400
91,000 MB/s
Athlon X2 6400+
87.5 MB/s

3D Mark 11 (Physics)

PassMark Data courtesy Passmark

PassMark (Single Core)

Specifications Full list of technical specs

summary

Core2 Duo E6400  vs
Athlon X2 6400+ 
Clock speed 2.13 GHz 3.2 GHz
Cores Dual core Dual core
Socket type
LGA 775
AM2

features

Has a NX bit Yes Yes
Has virtualization support Yes Yes
Instruction set extensions
SSE2
MMX
SSE3
SSE
3DNow!
Supplemental SSE3
Supports dynamic frequency scaling Yes Yes

power consumption

TDP 65W 125W
Annual home energy cost 15.66 $/year 30.11 $/year
Annual commercial energy cost 56.94 $/year 109.5 $/year
Performance per watt 1.35 pt/W 0.56 pt/W
Typical power consumption 52.81W 101.56W

details

Core2 Duo E6400  vs
Athlon X2 6400+ 
Architecture x86-64 x86-64
Threads 2 2
L2 cache 2 MB 2 MB
L2 cache per core 1 MB/core 1 MB/core
Manufacture process 65 nm 90 nm
Max CPUs 1 1
Voltage range 0.85 - 1.5V 1.35 - 1.4V
Operating temperature Unknown - 61.4°C Unknown - 55°C

overclocking

Overclocked clock speed 3.33 GHz 3.42 GHz
Overclocked clock speed (Water) 3.33 GHz 3.53 GHz
Overclocked clock speed (Air) 3.33 GHz 3.42 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 E6400
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AMD Athlon X2 6400+
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