CPUBoss Review Our evaluation of 3800+ vs 640 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
AMD Athlon II X4 640 

CPUBoss recommends the AMD Athlon II X4 640  based on its performance and single-core performance.

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VS
Front view of AMD Athlon II X4 640

AMD Athlon II X4 640

CPUBoss Winner

Differences What are the advantages of each

Front view of AMD Sempron 3800+

Reasons to consider the
AMD Sempron 3800+

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Significantly lower typical power consumption 50.38W vs 77.19W Around 35% lower typical power consumption
Significantly lower annual home energy cost 14.94 $/year vs 22.89 $/year Around 35% lower annual home energy cost
Significantly lower annual commercial energy cost 54.31 $/year vs 83.22 $/year Around 35% lower annual commercial energy cost
Front view of AMD Athlon II X4 640

Reasons to consider the
AMD Athlon II X4 640

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Much newer manufacturing process 45 nm vs 90 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Much more l2 cache 2 MB vs 0 MB Compared to all cpus, 2 MB l2 cache is just OK
Significantly higher clock speed 3 GHz vs 2.2 GHz More than 35% higher clock speed
Has virtualization support Yes vs No Somewhat common; Boosts performance of virtual machines
Much better geekbench 3 Multi-Core score 5,434 vs 858 More than 6.2x better geekbench 3 Multi-Core score
Much more l2 cache per core 0.5 MB/core vs 0 MB/core Compared to all cpus, 0.5 MB/core l2 cache per core is just OK
Much better overclocked clock speed (Air) 3.57 GHz vs 2.2 GHz More than 60% better overclocked clock speed (Air)
More cores 4 vs 1 3 more cores; run more applications at once
Better geekbench 3 single core score 1,559 vs 859 More than 80% better geekbench 3 single core score
Significantly higher Maximum operating temperature 71 °C vs 55 °C Around 30% higher Maximum operating temperature
More threads 4 vs 1 3 more threads
Much better overclocked clock speed (Water) 3.89 GHz vs 2.2 GHz More than 75% better overclocked clock speed (Water)
Better performance per watt 1.54 pt/W vs 0.59 pt/W More than 2.5x better performance per watt

Benchmarks Real world tests of Sempron 3800+ vs Athlon II X4 640

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

Sempron 3800+
59.1 MB/s
Athlon II X4 640
121,100 MB/s

PassMark Data courtesy Passmark

PassMark (Single Core)

Specifications Full list of technical specs

summary

Sempron 3800+  vs
Athlon II X4 640 
Clock speed 2.2 GHz 3 GHz
Cores Single core Quad core
Socket type
S1
AM2
AM3
Is unlocked No No

features

Has a NX bit Yes Yes
Has virtualization support No Yes
Instruction set extensions
SSE4a
SSE2
MMX
SSE3
SSE
3DNow!
Supports dynamic frequency scaling Yes Yes

power consumption

TDP 62W 95W
Annual home energy cost 14.94 $/year 22.89 $/year
Annual commercial energy cost 54.31 $/year 83.22 $/year
Performance per watt 0.59 pt/W 1.54 pt/W
Typical power consumption 50.38W 77.19W

bus

Clock speed 333 MHz 2,000 MHz

details

Sempron 3800+  vs
Athlon II X4 640 
Architecture x86-64 x86-64
Threads 1 4
L2 cache 0 MB 2 MB
L2 cache per core 0 MB/core 0.5 MB/core
L3 cache 0 MB 0 MB
L3 cache per core 0 MB/core 0 MB/core
Manufacture process 90 nm 45 nm
Max CPUs 1 1
Operating temperature Unknown - 55°C Unknown - 71°C

overclocking

Overclocked clock speed 2.2 GHz 3.57 GHz
Overclocked clock speed (Water) 2.2 GHz 3.89 GHz
PassMark (Overclocked) 912.1 2,020.8
Overclocked clock speed (Air) 2.2 GHz 3.57 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
AMD Sempron 3800+
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AMD Athlon II X4 640
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