You will be able to install up to 64GB of DDR3 RAM in that board. In saying that, two 32GB sticks of DDR3 RAM will cost a lot more than the cost of both the CPU and Motherboard and is unnecessary. I would recommends two 8GB DDR3 1333 - 2400MHz sticks in that board.
The CPU contains the Northbridge on AMD APUs, and and controls the RAM compatibility. As AMD are not the best at providing information regarding RAM compatibility, I would stick with 1866MHz and under RAM modules.