I run 1.1 VSOC at 3600, VDDP 1.2, don't use DOCP or XMP, but I guess it set the tRC based on XMP profile, even though I did not load it.
The only one relatively new VGA I have is GTX980 in my main machine. But anyway, it's not advisable to run bclk that high anyway, so these 3600 tests are mostly irrelevant for the moment. We will see in May if the add more dividers and unlock subtimings.
I'm only testing 2D for now, will move to 3D soon just to see what's possible.

My CPU is China, I believe. 4GHz at 1.3V and lower on air (1.325V set in bios, but using LLC3). 4.15 at 1.46V for some multithread benches on air.
Have only ran ~30min Prime95 Blend at 4G 1.3V, so can't call it stable.

PS: 3600C14 passed memtest with 1.485V(set in bios/soft) VDIMM.