CPUBoss Review Our evaluation of E8400 vs 3400+ among all CPUs

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

Sky Diver and Cloud Gate

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?

Sky Diver, Cloud Gate, CompuBench 1.5 Bitcoin mining and 11 more

Value

Are you paying a premium for performance?

Sky Diver, Cloud Gate, CompuBench 1.5 Bitcoin mining and 11 more

5.1

CPUBoss Score

Combination of all six facets

Winner
Intel Core2 Duo E8400 

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

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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 0 MB Compared to all cpus, 6 MB l2 cache is just OK
Much newer manufacturing process 45 nm vs 90 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Significantly higher clock speed 3 GHz vs 1.8 GHz More than 65% higher clock speed
Much more l2 cache per core 3 MB/core vs 0 MB/core Compared to all cpus, 3 MB/core l2 cache per core is just OK
Has virtualization support Yes vs No Somewhat common; Boosts performance of virtual machines
Much better overclocked clock speed (Air) 4.22 GHz vs 2.44 GHz Around 75% better overclocked clock speed (Air)
Significantly better PassMark (Single core) score 1,251 vs 522 Around 2.5x better PassMark (Single core) score
Significantly higher Maximum operating temperature 72.4 °C vs 55 °C More than 30% higher Maximum operating temperature
Better PassMark score 2,160 vs 448 More than 4.8x better PassMark score
Much better overclocked clock speed (Water) 4.23 GHz vs 2 GHz More than 2x better overclocked clock speed (Water)
More cores 2 vs 1 Twice as many cores; run more applications at once
Better performance per watt 1.83 pt/W vs 0.5 pt/W Around 3.8x better performance per watt
Newer Jan, 2008 vs May, 2006 Release date over 1 years later
Front view of AMD Sempron 3400+

Reasons to consider the
AMD Sempron 3400+

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Slightly lower typical power consumption 50.38W vs 52.81W Around 5% lower typical power consumption
Slightly lower annual commercial energy cost 54.31 $/year vs 56.94 $/year Around 5% lower annual commercial energy cost
Slightly lower annual home energy cost 14.94 $/year vs 15.66 $/year Around 5% lower annual home energy cost

Benchmarks Real world tests of Core2 Duo E8400 vs Sempron 3400+

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
Sempron 3400+
48.8 MB/s

PassMark Data courtesy Passmark

PassMark (Single Core)

Specifications Full list of technical specs

summary

Core2 Duo E8400  vs
Sempron 3400+ 
Clock speed 3 GHz 1.8 GHz
Cores Dual core Single core
Socket type
LGA 775
AM2
754
939

features

Has a NX bit Yes Yes
Has virtualization support Yes No
Instruction set extensions
SSE2
MMX
SSE3
SSE
SSE4.1
3DNow!
Supplemental SSE3
Supports dynamic frequency scaling Yes Yes

power consumption

TDP 65W 62W
Annual home energy cost 15.66 $/year 14.94 $/year
Annual commercial energy cost 56.94 $/year 54.31 $/year
Performance per watt 1.83 pt/W 0.5 pt/W
Typical power consumption 52.81W 50.38W

details

Core2 Duo E8400  vs
Sempron 3400+ 
Architecture x86-64 x86-64
Threads 2 1
L2 cache 6 MB 0 MB
L2 cache per core 3 MB/core 0 MB/core
Manufacture process 45 nm 90 nm
Max CPUs 1 1
Operating temperature Unknown - 72.4°C Unknown - 55°C

overclocking

Overclock popularity 125 2
Overclocked clock speed 4.22 GHz 2.44 GHz
Overclocked clock speed (Water) 4.23 GHz 2 GHz
Overclocked clock speed (Air) 4.22 GHz 2.44 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 200 MHz
Intel Core2 Duo E8400
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AMD Sempron 3400+
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