Hello, as per what the title say, i need help on making this ram (Asgard Bragi RGB) running stable at least 6000mt/s with reasonable timings, this is my friend build, specs are:

-Ryzen 7 8700G
– X870-A Gaming on the latest bios
– Asgard Bragi RGB 6809c34 4x16GB (per stick 16GB Single Rank, bought 2 kits)

The expo kit are designed to run 6800mt/s at cl34, but since he's doing 4×16, it do stresses the imc (idk abt AMD phoenix capability btw), and i wonder if running at 6000mt/s or even more is possible. I am new to ddr5, and having so little knowledge about it, but what i did to his pc was actually tuning down the impendance since stock xmp was stupid high for whatever reason, and there are 4 settings i didn't know, it is ProcCaDs, ProcCkDs, ProcDqDs, and ProcDqDqs, i proceed to set them at 40 ohms and its running stable….. at 4600mt/s. I really need your help about ddr5 impendance settings and what are the best values, also for the voltages.