ASRock Fatal1ty 990FX Killer Motherboard

Memory Support

AMD CPUs have an embedded memory controller, meaning that it is the processor, not the chipset, that defines what memory technologies you can have and the maximum amount of memory that is possible. The motherboard, however, may have a limitation as to how much memory can be installed.

The integrated memory controller from socket AM3+ processors supports DDR3 memories up to 1,866 MHz. According to ASRock, the Fatal1ty 990FX Killer supports memories up to 2,450 MHz.

The ASRock Fatal1ty 990FX Killer has four memory sockets. According to ASRock, this motherboard supports up to 64 GiB if you use four 16 GiB modules.

In order to enable the dual-channel mode, you must install two or four memory modules. When installing two memory modules, you will have to use two sockets with the same color, i.e., you must install one module in the first socket and the other module in the third socket (and not in the second one).

Figure 3: Memory sockets; install two or four modules for the best performance