Thanks for all the help Rob!
Here's what my manual states:
"4 x DIMMs, Max. 32GB, DDR3 2133 (O.C.)/1866/1600/1333/1066 MHz, ECC, Non-ECC, unbuffered memory"
"The maximum 32GB memory capacity can be supported with 8GN or above DIMMs, ASUS will update the memory QVL once the DIMMs are available on the market"
"Due to CPU space, AMD 100 Series CPUs support up to DDR3 1066MHz. With ASUS design, this motherboard can support up to DDR3 1333MHz"
There is some more about visiting ASUS website and such and something about Windows 32 bit, but I'm running a 64 bit version...