Hello, sorry that I am only answering now,
Yes I operate the board e.g. with 3600MHz still a few days ago I had there only 3200 MHz on it, so it is no problem to use also other Ram MHz the board makes that without effort with. LG
The board is suitable for DDR4 RAM. The clocking and other parameters should be matched to the CPU. According to the manufacturer, allowed DDR4 RAM DIMM: 4800(O.C.)/4600(O.C)/4500(O.C)/4400(O.C)/4266(O.C.)/4133(O.C.)/4000(O.C.)/3866(O.C.)/3733(O.C.)/3600(O.C.)/3466(O.C.)/3333(O.C.)/3200(O.C.)/3000(O.C.)/2933(O.C.)/2800(O.C.)/2666/2400/2133 MHz Non-ECC, Un-buffered Memory