CPUBoss Review Our evaluation of Q8400 vs 3800+ 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 Quad Q8400 

CPUBoss recommends the Intel Core2 Quad Q8400  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 Quad Q8400

Reasons to consider the
Intel Core2 Quad Q8400

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Much more l2 cache 4 MB vs 0 MB Compared to all cpus, 4 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
Higher clock speed 2.66 GHz vs 2.2 GHz More than 20% higher clock speed
Has virtualization support Yes vs No Somewhat common; Boosts performance of virtual machines
Much more l2 cache per core 1 MB/core vs 0 MB/core Compared to all cpus, 1 MB/core l2 cache per core is just OK
Much better geekbench 3 Multi-Core score 5,035 vs 858 More than 5.8x better geekbench 3 Multi-Core score
More cores 4 vs 1 3 more cores; run more applications at once
Significantly better overclocked clock speed (Air) 3.48 GHz vs 2.2 GHz Around 60% better overclocked clock speed (Air)
Better geekbench 3 single core score 1,465 vs 859 More than 70% better geekbench 3 single core score
Significantly higher Maximum operating temperature 71.4 °C vs 55 °C Around 30% higher Maximum operating temperature
More threads 4 vs 1 3 more threads
Much better overclocked clock speed (Water) 3.91 GHz vs 2.2 GHz Around 80% better overclocked clock speed (Water)
Front view of AMD Sempron 3800+

Reasons to consider the
AMD Sempron 3800+

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Much lower typical power consumption 50.38W vs 135.97W 2.7x lower typical power consumption
Much lower annual home energy cost 14.94 $/year vs 51.39 $/year 3.4x lower annual home energy cost
Much lower annual commercial energy cost 54.31 $/year vs 130.79 $/year 2.4x lower annual commercial energy cost

Benchmarks Real world tests of Core2 Quad Q8400 vs Sempron 3800+

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 Quad Q8400
113,900 MB/s
Sempron 3800+
59.1 MB/s

PassMark Data courtesy Passmark

PassMark (Single Core)

Specifications Full list of technical specs

summary

Core2 Quad Q8400  vs
Sempron 3800+ 
Clock speed 2.66 GHz 2.2 GHz
Cores Quad core Single core
Socket type
LGA 775
S1
AM2

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 95W 62W
Annual home energy cost 51.39 $/year 14.94 $/year
Annual commercial energy cost 130.79 $/year 54.31 $/year
Performance per watt 0.94 pt/W 0.59 pt/W
Typical power consumption 135.97W 50.38W

details

Core2 Quad Q8400  vs
Sempron 3800+ 
Architecture x86-64 x86-64
Threads 4 1
L2 cache 4 MB 0 MB
L2 cache per core 1 MB/core 0 MB/core
Manufacture process 45 nm 90 nm
Max CPUs 1 1
Operating temperature Unknown - 71.4°C Unknown - 55°C

overclocking

Overclocked clock speed 3.48 GHz 2.2 GHz
Overclocked clock speed (Water) 3.91 GHz 2.2 GHz
Overclocked clock speed (Air) 3.48 GHz 2.2 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 333 MHz
Intel Core2 Quad Q8400
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AMD Sempron 3800+
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