CPUBoss Review Our evaluation of E6600 vs E8400


Benchmark performance using all cores

PassMark, GeekBench (32-bit) and GeekBench (64-bit)

Single-core Performance

Individual core benchmark performance

PassMark (Single Core)


How much speed can you get out of the processor?

PassMark (Overclocked), Unlocked, Maximum Overclocked Clock Speed (Air) and 2 more


Are you paying a premium for performance?

Performance Per Dollar

CPUBoss Score

Performance, Single-core Performance, Overclocking and Value

Intel Core2 Duo E8400 

CPUBoss recommends the Intel Core2 Duo E8400  based on its value.

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Differences What are the advantages of each

Front view of Intel Pentium E6600

Reasons to consider the
Intel Pentium E6600

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Newer Jan, 2010 vs Jan, 2008 Release date over 2 years later
Better geekbench (64-bit) score 5,212 vs 3,092 Around 70% better geekbench (64-bit) score
Higher Maximum operating temperature 74.1 °C vs 72.4 °C Almost the same
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 better performance per dollar 26.09 pt/$ vs 7.84 pt/$ More than 3.2x better performance per dollar
Much more l2 cache per core 3 MB/core vs 1 MB/core 3x more l2 cache per core
Significantly better 3DMark11 physics score 2,310 vs 1,940 Around 20% better 3DMark11 physics score
Supports trusted computing Yes vs No Somewhat common; Allows for safer, more reliable computing

Benchmarks Real world tests of Pentium E6600 vs Core2 Duo E8400

GeekBench (32-bit) Data courtesy Primate Labs

GeekBench (64-bit) Data courtesy Primate Labs


3D Mark 11 (Physics)

PassMark Data courtesy PassMark

PassMark (Single Core) Data courtesy PassMark

Specifications Full list of technical specs


Pentium E6600  vs
Core2 Duo E8400 
Clock speed 3.06 GHz 3 GHz
Cores Dual core Dual core
Socket type
LGA 775


Has a NX bit Yes Yes
Supports trusted computing No 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 4.82 pt/W 5.62 pt/W
Typical power consumption 52.81W 52.81W


Pentium E6600  vs
Core2 Duo E8400 
Architecture x86-64 x86-64
Threads 2 2
L2 cache 2 MB 6 MB
L2 cache per core 1 MB/core 3 MB/core
Manufacture process 45 nm 45 nm
Transistor count 228,000,000 410,000,000
Max CPUs 1 1
Clock multiplier 11 9
Operating temperature Unknown - 74.1°C Unknown - 72.4°C

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


Architecture FSB FSB
Number of links 1 1
Clock speed 1,066 MHz 1,333 MHz
Intel Pentium E6600
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Intel Core2 Duo E8400
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