I just bought a FX-8350 cpu and a m5a99fx pro r2.0 that was bundled with 2x4gb 2400mhz ram.
Unfortunately it looks like the cpu/mobo can't handle up to 2400 mhz.
I also have 4x4gb 1600 mhz ram.
When I installed the first 2, the bios set it at 1600 mhz. When i installed the 4 sticks it set...