What do you mean by overclocking your motherboard?
Seems like your memory is running at stock speeds DDR-2133 or 1066 MHz.
Have you updated your motherboard to the latest BIOS?
Did you enable the XMP profile in your BIOS?
Also,assuming that you have the R5 1600 1st gen not the AF(which is 2nd gen) you might run into instability when trying to run at 3200... if that happens, lowering the speed to 3000, 2933 or even 2800 might help.