G.Skill Trident Z F4-3200C16D-16GTZB.
The C14Ds are on the QVL list. Mine having loose timings should help, I figure. They are SS B-dies, IIRC, so they should work (been thinking about it over lunch. That might have been my logic. I do remeber I picked this kit over another because it was they stock they had.
And yes, I've cleared the CMOS. Multiple times.
I did find the slots a bit flimsy, but they seemed nicely seated and locked every time. I made each DIMM sit on every one, no only on DIMMA2, like MSI recommends.