@JasonOrme Yes, I've tried Safe and Fast settings (from the Ryzen DRAM Calc program), gear down enabled, disabled, everything.
Even DOCP (slower timings than either of these) is not stable at 3200.
It may be possible to actually slow the primary timings to say c16 or c18 and then maybe you might get it to play at 3200, but it'd be a faff, and I have a feeling it wouldn't bring any real benefits.
I'm quite happy at 2933, in everyday use it makes no difference whatsoever. Maybe a handful of points in a benchmark, but meh. I potter round the internet and play the odd game. Does me fine!
I don't even need 32GB, so I could just take two sticks out again, but it's a bit pointless.
May well chuck a 3000 or 4000 series into mine at some point.