AMD CPUs have an embedded memory controller, meaning that it is the processor, not the chipset, that defines what memory technologies and the maximum amount of memory you can have. The motherboard, however, may have a limitation as to how much memory can be installed.
The integrated memory controller from socket FM1 processors supports DDR3 memories up to 1,866 MHz under dual-channel architecture. However, ECS says the A75F-A supports memory up to 2,133 MHz through overclocking.
The ECS A75F-A has four memory sockets, and since DDR3 memory modules can now be found in capacities up to 8 GB, you can have up to 32 GB with this motherboard if you use four 8 GB modules.
The first and third sockets are white, while the second and fourth are gray. In order to achieve the maximum performance, you should install two or four memory modules in order to enable dual-channel architecture. When only two modules are used, install them in the white sockets.