CPUBoss Review Our evaluation of E8400 vs E6600 among desktop CPUs (45 to 75W)

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

5

CPUBoss Score

Combination of all six facets

Winner
Intel Core2 Duo E8400 

CPUBoss recommends the Intel Core2 Duo E8400  based on its performance, single-core performance and overclocking.

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VS

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 4 MB 50% more l2 cache; more data can be stored in the l2 cache for quick access later
Much newer manufacturing process 45 nm vs 65 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Significantly higher clock speed 3 GHz vs 2.4 GHz More than 25% higher clock speed
Supports trusted computing Yes vs No Somewhat common; Allows for safer, more reliable computing
Much higher Maximum operating temperature 72.4 °C vs 60.1 °C More than 20% higher Maximum operating temperature
Significantly better PassMark (Single core) score 1,257 vs 919 More than 35% better PassMark (Single core) score
Significantly better PassMark score 2,172 vs 1,896 Around 15% better PassMark score
Better overclocked clock speed (Air) 4.23 GHz vs 3.49 GHz More than 20% better overclocked clock speed (Air)
Newer Jan, 2008 vs Jul, 2006 Release date over 1 years later
Better overclocked clock speed (Water) 4.21 GHz vs 3.87 GHz Around 10% better overclocked clock speed (Water)
Front view of Intel Core2 Duo E6600

Reasons to consider the
Intel Core2 Duo E6600

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CPUBoss is not aware of any important advantages of the E6600 vs the E8400.

Benchmarks Real world tests of Core2 Duo E8400 vs E6600

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
Core2 Duo E6600
102,200 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
E6600 
Clock speed 3 GHz 2.4 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

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

details

Core2 Duo E8400  vs
E6600 
Architecture x86-64 x86-64
Threads 2 2
L2 cache 6 MB 4 MB
L2 cache per core 3 MB/core 2 MB/core
Manufacture process 45 nm 65 nm
Transistor count 410,000,000 291,000,000
Max CPUs 1 1
Clock multiplier 9 9
Voltage range 0.85 - 1.36V 0.85 - 1.5V
Operating temperature Unknown - 72.4°C Unknown - 60.1°C

overclocking

Overclock popularity 125 47
Overclock review score 4.5 5
Overclocked clock speed 4.23 GHz 3.49 GHz
Overclocked clock speed (Water) 4.21 GHz 3.87 GHz
Overclocked clock speed (Air) 4.23 GHz 3.49 GHz

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 2.11 pt/W 1.81 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
Intel Core2 Duo E8400
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Intel Core2 Duo E6600
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