CPUBoss Review Our evaluation of E8400 vs 8450e 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

3.6

CPUBoss Score

Combination of all six facets

Winner
Intel Core2 Duo E8400 

CPUBoss recommends the Intel Core2 Duo E8400  based on its 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 higher clock speed 3 GHz vs 2.1 GHz Around 45% higher clock speed
Much better PassMark (Single core) score 1,251 vs 697 Around 80% better PassMark (Single core) score
Much newer manufacturing process 45 nm vs 65 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Much better overclocked clock speed (Air) 4.22 GHz vs 2.75 GHz Around 55% better overclocked clock speed (Air)
Much better overclocked clock speed (Water) 4.23 GHz vs 2.1 GHz More than 2x better overclocked clock speed (Water)
Higher Maximum operating temperature 72.4 °C vs 71 °C Almost the same
Front view of AMD Phenom X3 8450e

Reasons to consider the
AMD Phenom X3 8450e

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More cores 3 vs 2 1 more cores; run more applications at once
More threads 3 vs 2 1 more threads
Newer Sep, 2008 vs Jan, 2008 Release date 8 months later

Benchmarks Real world tests of Core2 Duo E8400 vs Phenom X3 8450e

GeekBench (32-bit) Data courtesy Primate Labs

GeekBench

PassMark Data courtesy Passmark

PassMark (Single Core)

Specifications Full list of technical specs

summary

Core2 Duo E8400  vs
Phenom X3 8450e 
Clock speed 3 GHz 2.1 GHz
Cores Dual core Tri core
Socket type
LGA 775
AM2+

features

Has a NX bit Yes Yes
Has virtualization support Yes Yes
Instruction set extensions
SSE4a
SSE2
MMX
SSE3
SSE
SSE4.1
3DNow!
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 1.83 pt/W 1.24 pt/W
Typical power consumption 52.81W 52.81W

details

Core2 Duo E8400  vs
Phenom X3 8450e 
Architecture x86-64 x86-64
Threads 2 3
L2 cache 6 MB 2 MB
L2 cache per core 3 MB/core 0.67 MB/core
Manufacture process 45 nm 65 nm
Max CPUs 1 1
Voltage range 0.85 - 1.36V 1.05 - 1.25V
Operating temperature Unknown - 72.4°C Unknown - 71°C

overclocking

Overclocked clock speed 4.22 GHz 2.75 GHz
Overclocked clock speed (Water) 4.23 GHz 2.1 GHz
Overclocked clock speed (Air) 4.22 GHz 2.75 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

bus

Clock speed 1,333 MHz 1,800 MHz
Intel Core2 Duo E8400
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AMD Phenom X3 8450e
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