After a few days of tweaking, I found these timings give me are stable and yield most consistent and highest yet 3DMark CPU Scores (9285-9299): ZenTimings
I can do tRAS = 54, but that lowers my read/write speeds. Many say tRAS = tRCD + tRTP is as low as you should go, though my latency was down to 61.4ns from 63.4ns with a penalty to L3 Cache and Memory speeds.
I haven't played with voltages, set EXPO and started running numbers down from there. Stock was 80.2ns latency! I can't do CL28 (bios resets all tuning values), and frankly haven't yet tried tRCD = 36 or lower.
Other than tRCD, without touching voltages, is there anything else I should change? Here is mostly stock ZenTimings, only change from stock was tREFI=12463 in EXPO. Stock ZenTimings