If you are comparing the A6-3400M with A8-3500M for the graphics performance, the A8-3500M is the clear winner with the Radeon HD 6620G which has substantially better performance as compared to the Radeon HD 6480G in the A6-3400M.
On the processor side, the gain of the A8-3850M is not significant. The A8-3500M is 100 MHz faster than the A6-3400M in both the base clock and the turbo clock.
Table : AMD A6-3400M Vs AMD A8-3500M Feature Differences
|Feature||AMD A6-3400M||AMD A8-3500M|
| Core Frequency
| No. Of Cores
| Cache Organization
||4 MB L2 cache||4MB L2 Cache|
| Turbo Frequency
| TDP Rating
| 64 Bit Support
|Integrated Memory Controller||DDR3-1333||DDR3-1333|
| Integrated Graphics
||Yes, Radeon HD 6480G||Yes, Radeon HD 6620G|
Table : AMD A6-3400M Vs AMD A8-3500M Benchmarking Comparison
Note : The Passmark score of AMD A6-3400M is slightly greater than the A8-3500M, as posted on passmark site, which we believe is due to the small number of the samples. We expect this to get corrected as more samples are updated.
|Benchmarks||AMD A6-3400M||AMD A8-3500M|
| PassMark Score
| Super Pi 2M (Lower in better)
||89 Seconds||81 seconds|
| 3D Mark 06 CPU
| Windows 7 Experience Score
Some more details of AMD A6-3400M
The AMD A6-3400M is an entry level quad-core processor for notebooks. This is code named as Llano and released on June 15th of 2011. This processor comes under AMD A-Series. The base frequency of the processor is 1.4GHz only. Its Turbo Boost technology can over clock it up to 2.3 GHz, but this over clocking completely depends on temperature conditions and number of cores usage. This processor comes with integrated Radeon HD 6520G Graphics card and integrated memory controller that can support for DDR3 (L)- 1333 memory and a PCle 2.0 controller. The TD of this processor is 35 Watt.
Some more details of AMD A8-3500M
The AMD A8-3500M is a quad-core processor codenamed as Llano. It is designed for mid-range notebooks. The base frequency of this laptop is 1.5 GHz. The turbo boost technology of the processor can over clock it up to 2.4 GHz successfully basing on temperature conditions and core usage. The processor got integrated Radeon HD 6620G graphics card in it. The integrated memory controller of the processor can support DDR3 (L)-1333 memory and PCle 2.0 controller. The TDP of the processor is 35 watt. This processor is latest for the market and released on June 14th of 2011. This processor got 4 cores and 4 threads in it.