CPUBoss Review Our evaluation of X6800 vs E8400 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

3.3

CPUBoss Score

Combination of all six facets

Winner
Intel Core2 X6800 

CPUBoss recommends the Intel Core2 X6800  based on its .

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VS

Differences What are the advantages of each

Front view of Intel Core2 X6800

Reasons to consider the
Intel Core2 X6800

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CPUBoss is not aware of any important advantages of the Core2 X6800 vs the Core2 Duo E8400.

Front view of Intel Core2 Duo E8400

Reasons to consider the
Intel Core2 Duo E8400

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Much newer manufacturing process 45 nm vs 65 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Supports trusted computing Yes vs No Somewhat common; Allows for safer, more reliable computing
Much better overclocked clock speed (Air) 4.22 GHz vs 3.54 GHz Around 20% better overclocked clock speed (Air)
Much higher Maximum operating temperature 72.4 °C vs 60.4 °C Around 20% higher Maximum operating temperature
Lower typical power consumption 52.81W vs 60.94W Around 15% lower typical power consumption
Newer Jan, 2008 vs Jul, 2006 Release date over 1 years later
Lower annual commercial energy cost 56.94 $/year vs 65.7 $/year Around 15% lower annual commercial energy cost
Lower annual home energy cost 15.66 $/year vs 18.07 $/year Around 15% lower annual home energy cost
Better overclocked clock speed (Water) 4.23 GHz vs 4.07 GHz Around 5% better overclocked clock speed (Water)

Benchmarks Real world tests of Core2 X6800 vs Duo E8400

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 X6800
125,200 MB/s
Core2 Duo E8400
128,000 MB/s

GeekBench (32-bit) Data courtesy Primate Labs

GeekBench

3D Mark 11 (Physics)

PassMark Data courtesy Passmark

PassMark (Single Core)

Specifications Full list of technical specs

summary

Core2 X6800  vs
Duo E8400 
Clock speed 2.93 GHz 3 GHz
Cores Dual core Dual core
Socket type
LGA 775

features

Has a NX bit Yes Yes
Supports trusted computing No Yes
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 75W 65W
Annual home energy cost 18.07 $/year 15.66 $/year
Annual commercial energy cost 65.7 $/year 56.94 $/year
Performance per watt 1.59 pt/W 1.83 pt/W
Typical power consumption 60.94W 52.81W

bus

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

details

Core2 X6800  vs
Duo E8400 
Architecture x86-64 x86-64
Threads 2 2
L2 cache 4 MB 6 MB
L2 cache per core 2 MB/core 3 MB/core
Manufacture process 65 nm 45 nm
Transistor count 291,000,000 410,000,000
Max CPUs 1 1
Clock multiplier 11 9
Voltage range 0.85 - 1.5V 0.85 - 1.36V
Operating temperature Unknown - 60.4°C Unknown - 72.4°C

overclocking

Overclocked clock speed 3.54 GHz 4.22 GHz
Overclocked clock speed (Water) 4.07 GHz 4.23 GHz
Overclocked clock speed (Air) 3.54 GHz 4.22 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 X6800
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Intel Core2 Duo E8400
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