Well, I'm waiting to get some more parts for my WC build. I'm on stock cooling right now, so I'm sure that's a factor. But with very mild OCs I'm not getting anywhere. I've even tried setting everything to stock voltages and timings manually and still get crashes.
As I say you may get better stability with this newer bios. It's still very limited for quads compared to other boards, but auto settings do seem to be working better.

I'm sure your Watercooling will be beneficial

RLM