So a little thing I found with my particular setup.
Tcwl and Trdwr subtimings are influenced by the other. If I set my Trdwr timing to 6, I cannot set Tcwl any lower than the default timing of 14. On the other side of the fence, if I set Tcwl to 10 (Can't set to 9, it self-corrects to 10 for me), the lowest I can set Trdwr to is 9.
The latter increases copy speeds marginally compared to the former.
RAM used is in my sig. Samsung B-die. I don't think the geardown mode is correctly managed on my MSI board; If I set GDM to disabled, I should be able to set command rate to 1, but it auto-configures to 2 on it's own. Probably losing some performance there, otherwise I could likely get CAS to 13. Feel free to steal timings. I have not yet found the lowest Trfc can go, and Tras and Trc violates some rules still so I won't go lower than that. Anyways, heres the timings I managed on 3200. I'll work on 3333 next but it's hard to get stable; The RAM itself is rock solid, but random BSOD's when not putting a load on the PC plague this build.
edit: tRFC got misconfigured, correcting it now. also temporarily on stock CPU speeds to see if I can fish out some BSOD'sEdited by ssateneth - 10/7/17 at 2:56pm