Hi there.
I am currently running 32Gb of Corsair CMK32GX4M4D3000C16 at 3600Mhz. on an ASUS PRIME x399-A with bios 0808. What you can try is to reset the ram settings to auto and reboot. Now go into the bios and try setting the ram speed in the advanced tab to 3600. Do not try to enable DOCP or XMP or any such other nonsense. Then scroll down to the entry that says DRAM Timing control. Press enter to bring up the menu. Key in your speed settings and you should be good to go. Cl 18 - rcd 19 - RP 19 - Ras 39.
Then exit that menu and go down to the Dram voltage settings and key in 1.25 in the AB and CD channel settings.
Reboot and see if this works.
If not then add 2 to each of the first 3 of the timings above.
Your mileage may vary, but I have found that the AMD DOCP profiles and the presets are rubbish, as they are for samsung chips, and corsair uses Micron chips......
Here are the settings that I used for a stable 3600Mhz with the CMK32GX4M4D3000C16
Settings are cas(CL) 22
RCD 24
RP 27
RAS 36
TRC 70
EDITED UPDATE......
Have now clocked stable @3800 Mhz
Timings.....
CL .... 20
TRCCRD 21
TRCRWD... 21
TRP.... 22
tRAS... 36
TRC .... 66
Voltage is 1.35 Volts.
