CPUBoss Review Our evaluation of E8400 vs 260


Benchmark performance using all cores

Cinebench R11.5, PassMark, GeekBench (32-bit) and GeekBench (64-bit)

Single-core Performance

Individual core benchmark performance

Cinebench R11.5 (1-core) and PassMark (Single Core)


How much speed can you get out of the processor?

overclock popularity


Are you paying a premium for performance?

Performance Per Dollar

No winner declared

Too close to call

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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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Significantly more l2 cache 6 MB vs 2 MB 3x 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 1 MB/core 3x more l2 cache per core
Better PassMark (Single core) score 1,257 vs 1,076 More than 15% better PassMark (Single core) score
Front view of AMD Athlon II X2 260

Reasons to consider the
AMD Athlon II X2 260

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Higher clock speed 3.2 GHz vs 3 GHz More than 5% higher clock speed
Newer May, 2010 vs Jan, 2008 Release date over 2 years later
Slightly higher Maximum operating temperature 74 °C vs 72.4 °C Almost the same

Benchmarks Real world tests of Core2 Duo E8400 vs Athlon II X2 260

GeekBench (32-bit) Data courtesy Primate Labs

x264 HD 4.0

Core2 Duo E8400
33.59 fps
Athlon II X2 260
33.31 fps

3D Mark 11 (Physics)

Cinebench R11.5

Cinebench R11.5 (Single Core)

PassMark Data courtesy PassMark

Specifications Full list of technical specs


Core2 Duo E8400  vs
Athlon II X2 260 
Clock speed 3 GHz 3.2 GHz
Cores Dual core Dual core
Socket type
LGA 775


Has a NX bit Yes Yes
Has virtualization support Yes Yes
Instruction set extensions
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 5.63 pt/W 4.78 pt/W
Typical power consumption 52.81W 52.81W


Core2 Duo E8400  vs
Athlon II X2 260 
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 45 nm
Max CPUs 1 1
Voltage range 0.85 - 1.36V 0.83 - 1.4V
Operating temperature Unknown - 72.4°C Unknown - 74°C


Overclock popularity 125 13

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


Clock speed 1,333 MHz 2,000 MHz
Intel Core2 Duo E8400
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AMD Athlon II X2 260
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