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Differences What are the advantages of each

Front view of AMD A4 4020

Reasons to consider the
AMD A4 4020

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Higher clock speed 3.2 GHz vs 3 GHz More than 5% higher clock speed
Newer Dec, 2013 vs May, 2013 Release date 7 months later
Front view of AMD A4 4000

Reasons to consider the
AMD A4 4000

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Much better performance per watt 5.4 pt/W vs 0.73 pt/W More than 7.2x better performance per watt

Benchmarks Real world tests of A4 4020 vs 4000

CompuBench 1.5 (Face detection)

A4 4020
2.54 mPixels/s
A4 4000
2.42 mPixels/s

CompuBench 1.5 (Ocean surface simulation) Data courtesy CompuBench

A4 4020
83.14 fps
A4 4000
95.86 fps

CompuBench 1.5 (T-Rex) Data courtesy CompuBench

A4 4020
-1 fps
A4 4000
0.38 fps

PassMark Data courtesy Passmark

A4 4020
1,835
A4 4000
1,809

PassMark (Single Core)

A4 4020
1,157
A4 4000
1,103

Specifications Full list of technical specs

summary

A4 4020  vs
4000 
Clock speed 3.2 GHz 3 GHz
Turbo clock speed 3.4 GHz 3 GHz
Cores Dual core Dual core
Is unlocked No No

features

Has a NX bit Yes Yes
Has virtualization support Yes Yes
Instruction set extensions
SSE4a
AVX 1.1
SSE2
F16C
MMX
XOP
AVX
SSE3
SSE
BMI1
AMD64
SSE4.1
FMA4
FMA3
SSE4.2
ABM
CVT16
AMD-V
Supplemental SSE3
AES
TBM
Supports dynamic frequency scaling Yes Yes

memory controller

Memory controller Built-in Built-in
Memory type
DDR3-1333
DDR3

details

A4 4020  vs
4000 
Architecture x86-64 x86-64
Threads 2 2
L2 cache 1 MB 1 MB
L2 cache per core 0.5 MB/core 0.5 MB/core
Manufacture process 32 nm 32 nm
Max CPUs 1 1
Operating temperature Unknown - 70°C Unknown - 70°C

integrated graphics

GPU GPU GPU
Label Radeon HD 7480D Radeon™ HD 7480D
GPU clock speed 720 MHz 720 MHz

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 0.73 pt/W 5.4 pt/W
Typical power consumption 52.81W 52.81W
AMD A4 4020
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AMD A4 4000
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