Currently, the A75 FCH (fusion controller hub) is used in the top tier motherboards for the A-Series APUs from AMD. The A85FX chipset is set to add support for RAID 5 and increase the number of avilable SATA 3.0 from six to eight.
The A85FX will still support all previous features of the A75 chipset.
*16 USB ports, 4x USB 3.0, 10x USB 2.0 and 2x USB 1.1
*RAID 0, 1, 10
*DisplayPort and VGA outputs
*4x PCI-E 2.0 lanes for Add on cards
This chipset is to support AMD's next generation APU platform 'Comal' featuring AMD's 'Trinity' APU which is expected to provide more than 50% better GPU performance over current A series APUs. Trinity will have an updated DX11 GPU and will have 4 enhanced Bulldozer based x86 cores, code named 'Pilecriver', according to Sources Trinity will lack L3 cache like current Llano chips to make space for the GPU.
The A85FX is said to be FM2 socket only, and may not be backwards compatible.