Last week I picked up a new 9800x3D along with 64GB of 6000MT/s CL30 memory. After a week of tweaking, I believe I've dialed in good, stable settings, passing many multi-hour Ycruncher VT3 runs along with a handfull of other tests/games/etc.
That said, as I keep reading about PBO with 9800x3D's I'm beginning to feel like I'm either very lucky, or maybe missing something? I'm running 10x scaler, motherboard limits, +200MHz, -50 CO on cores 0-6 and -30 on core 7 (I took the attached CPU-Z screenshot while running it's built-in bench to show the 5425MHz clock running, depending on load it'll stabilize between 5GHz and 5.425GHz).
I've not done any adjustments to LLC, and I've read some people say that adds stablity, but if I'm not running into any issues with auto, is that fine? Even with Ycruncher BBP I'm able to keep temps right at 95 max without tripping throttling. Using the Arctic Liquid Freezer III Pro 360 AIO with Duronaut and would recommend it to anyone. I have 6 NF-A12x25's in push-pull on it.
On the memory front, I can't push past 6000MT/s or CL30 with my kit/IMC even with 1.5v, so I settled on decent timings and an FCLK of 2200MHz – I haven't tried pushing FCLK past this, I kind of feel like I've already pushed my luck. VSOC is 1.2v and memory's at 1.35v, can't go any lower without errors though. EXPO had them at 1.4v so felt good being able to drop them down a little.
All in all, anything else I should try to test stability? Anything glaring I'm missing? I'm pretty happy right now all things considered.
EDIT: Props to Buildzoid for the baseline timings