The a10 7850k has a powerful graphics chip fused with the CPU. Its equal to the Radeon HD 7750. You will require dual channel DDR3 memory from 2133Mhz to 2400Mhz. The RAM acts as graphics memory and is UMA. UMA will use as much graphics memory depending on how much RAM is available. The a10 7850k can drive 4k displays. You dont need an external graphics card and you also get ITX motherboards which support upto 16gb DDR3 2400Mhz.
The biggest feature of the A10 is HSA. HSA is not yet implemented and will get mainlined in kernel 3.17. HSA is a GPGPU solution from AMD. HSA will make the GPU and CPU work together to solve tasks. Unlike NVIDIA CUDA which only uses the graphics card, HSA will make the APU share cache/memory and data. Programs like Blender/gimp will benefit the most.
But if you really want muscle, then the FX 8320 is the best and can be safely overclocked to 4.5Ghz for everyday and heavy tasks, also. The 8 core FX chips have 16MB total cache. You will need a graphics card to drive displays. There are only 2 models of micro-ATX boards for the FX cpus but you cannot overclock them on any of these boards. If you are looking at 6 years into the future, then you will need ATX boards...
The FX 8320 is 32nm and uses more power than the A10 7850k(28nm).
You can also take a look at the newly released AMD processors...http://www.pcworld.com/article/2600307/ ... s-too.html
http://www.phoronix.com/scan.php?page=a ... 2sep&num=1
So there is a price cut for AMD 8 core processors. AMD has realized that 6/4core chips made by them are no longer a viable purchase option.
If you are a CPU junkie, get the FX, if not then get the A10.
All in all, this is the 'dying' phase for Intel and AMD in making processors and marks the end of an era. Both of them are focussed on lower power, high performance parts. The future is intelligent multicore computing. Intel has plans for making Atom chips as powerful as an AMD x6 1090t. Wireless AC will also be included on motherboards when DDR4 becomes mainstream at the end of 2016. There will also be PCie lanes dedicated for storage as current SATA 3.0 is too slow. HDD's wont last another 2 years....this is not a prediction. Seagate has spent heavily on R&D for SSD's.