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Differences What are the advantages of each

Front view of AMD A8 3870K

Reasons to consider the
AMD A8 3870K

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Is unlocked Yes vs No Somewhat common; An unlocked multiplier allows for easier overclocking
Significantly higher clock speed 3 GHz vs 2.5 GHz 20% higher clock speed
Much better PassMark (Single core) score 1,032 vs 790 More than 30% better PassMark (Single core) score
Much better overclocked clock speed (Air) 3.56 GHz vs 2.85 GHz More than 25% better overclocked clock speed (Air)
Much better overclocked clock speed (Water) 3.67 GHz vs 2.2 GHz More than 65% better overclocked clock speed (Water)
Higher Maximum operating temperature 72.7 °C vs 70.5 °C Around 5% higher Maximum operating temperature
Front view of AMD A6 3620

Reasons to consider the
AMD A6 3620

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Much better performance per watt 1.94 pt/W vs 1.03 pt/W Around 90% better performance per watt
Much lower annual home energy cost 15.66 $/year vs 40.03 $/year 2.6x lower annual home energy cost
Much lower annual commercial energy cost 56.94 $/year vs 138.41 $/year 2.4x lower annual commercial energy cost

Benchmarks Real world tests of A8 3870K vs A6 3620

CompuBench 1.5 (Bitcoin mining) Data courtesy CompuBench

A8 3870K
46.8 mHash/s
A6 3620
26.89 mHash/s

CompuBench 1.5 (T-Rex) Data courtesy CompuBench

A8 3870K
0.62 fps
A6 3620
0.28 fps

Sky Diver Data courtesy FutureMark

A8 3870K
2,532
A6 3620
1,670

Cloud Gate Data courtesy FutureMark

A8 3870K
4,726
A6 3620
3,590

GeekBench 3 (Multi-core) Data courtesy Primate Labs

A8 3870K
5,602
A6 3620
4,173

GeekBench 3 (Single core) Data courtesy Primate Labs

A8 3870K
1,597
A6 3620
1,201

GeekBench 3 (AES single core) Data courtesy Primate Labs

A8 3870K
126,200 MB/s
A6 3620
94,100 MB/s

PassMark Data courtesy Passmark

A8 3870K
3,596
A6 3620
2,825

Specifications Full list of technical specs

summary

A8 3870K  vs
A6 3620 
Clock speed 3 GHz 2.5 GHz
Cores Quad core Quad core
Is unlocked Yes No

features

Has a NX bit Yes Yes
Has virtualization support Yes Yes
Instruction set extensions
SSE4a
SSE2
MMX
SSE3
SSE
AMD64
AMD-V
3DNow!
Supports dynamic frequency scaling Yes Yes

power consumption

TDP 100W 65W
Annual home energy cost 40.03 $/year 15.66 $/year
Annual commercial energy cost 138.41 $/year 56.94 $/year
Performance per watt 1.03 pt/W 1.94 pt/W
Typical power consumption N/A 52.81W

details

A8 3870K  vs
A6 3620 
Architecture x86-64 x86-64
Threads 4 4
L2 cache 4 MB 4 MB
L2 cache per core 1 MB/core 1 MB/core
Manufacture process 32 nm 32 nm
Transistor count 1,178,000,000 1,178,000,000
Max CPUs 1 1
Die size 228 mm² 228 mm²
Voltage range 0.45 - 1.41V 0.45 - 1.41V
Operating temperature Unknown - 72.7°C Unknown - 70.5°C

overclocking

Overclocked clock speed 3.56 GHz 2.85 GHz
Overclocked clock speed (Water) 3.67 GHz 2.2 GHz
Overclocked clock speed (Air) 3.56 GHz 2.85 GHz

integrated graphics

GPU GPU GPU
Label Radeon™ HD 6550D Radeon™ HD 6530D
Latest DirectX 11.0 11.0
GPU clock speed 600 MHz 443 MHz

memory controller

Memory controller Built-in Built-in
Memory type
DDR3-1866
DDR3-1600
DDR3-1333
AMD A8 3870K
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AMD A6 3620
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