RAM tweaking is about learning...First, boot at example 4.6-4.7 GHz with manual voltage (1.35-1.375V) and LLC3.
In WIndows u can increase the CPU voltage on 1.4V and try go to 4.9 GHz, if failed, or frozed, restart and in Widnows use higher COU voltage...For 5GHz maybe u will need up to 1.5V, but all depends also on temps, silicon lotery etc. After u will know, your CPU is able run Superpi with JEDEC RAM settings, u can continue in RAM and SOC tweaking (FCLK 1:1 with RAM and fun with RAM timing and driving)
It is not job for few minutes, but for few hours and maybe for few days.