yes, I've tried 1866 11-10-11-31 instead of your mentioned values for latencies (which i don't will bring any change) and still my system can't boot properly beyond 1600. I have been using <1.5v Cpu V and DRAM @ stock 1.5V ( because idk why the system won't let it go beyond that under any case). NB voltages also tweaked a couple of times with 1600 and 1866 both but at the latter freq. System just shows "Overclocking Failed!" at the boot post up.
Now, that i have the MSI GTX 1050 Ti GAMING X 4G edition card, even 1600 hangs up the machine at boot logo display most of the times and the only way to go to desktop safely as of now is being polite and humble to the voltages and ram freq., by only giving a factory overclock increment to 4.3 Ghz (that my cpu came with printed on box as its turbo boost).
So, because of discrete card now, there is 7.9 gig RAM available and I don't feel as if o.c.'ing would help me get that sole performance boost that I'm expecting from this world's best flagship apu of 2014!
..and I'm currently running the memory stick in slot B1 (i think) which is second black slot...previously (when i was busy o.c.ing it) it was in the last/grey slot (i.e. B2).