Ok you go into Advanced Memory Settings >> Memory Subtimings and you find tRC and set it to 58
While you're in there you can also change
tFAW to 24 (from 38)
This is best to be at X4 of tRRDS. So 6x4=24
And most timings have the rule of multiplication of others. Those numbers are not chosen out of thin air and you cant change it to whatever.
tRC should be 58 because 58=18+38+2.
18 and 38 is two numbers on your primary timings. The +2 is a rule of stability.
tRAS:38 is also made out of 18+18+2 (again +2 for stability)
If your RAM can take it all these (first 6 timings) could be like this:
16-18-18-18-36-54
This is without the +2 on both tRAS and tRC.
Just to give you an idea of whats going on in there.
Its better to not change too many timings together because if any instability happen you dont know which one caused it.
For now just change tRC:58 and tFAW:24
For DRAM tweaking there are 2 maybe 3 paths you can take.
1. To run speed as high as possible with XMP timing settings and maybe try to tight them a bit.
2. To run XMP speed and tight timings as much as possible
3. To find a balance between them both. Some higher speed and some tightness in timings.
Personally I prefer first because with higher DRAM speed you also get higher UCLK/FCLK speeds.
To remind you, UCLK is the memory controller speed (UMC as Unified Memory Controller) on the CPU SoC and FCLK is the Infinity Fabric (IF) speed which is the bus/interconnection of SoC with the Core dies and also between the 2 Core dies that some CPUs have (5900X/5950X)
So as we said on earlier posts these 3 speeds is best to run the same because all connected together and the latency between them is the lowest possible. Your case this speed now is 1800MHz.
There is a limit of how high this can go. It depends on the mainboard traces quality between DRAM and CPU socket, on the capability of DRAM to run higher clock than stock with or without overvoltage, on the quality traces of the CPU substrate (for FCLK overclock with or without overvoltage), on the ability of UMC to run higher (UCLK) with or without overvoltage.