the memory and motherboard will have next to no effect on the overall performance of that cpu. The motherboard is overpriced and pointless, b-die mem is horrendously overpriced and neither will extract better performance out of the cpu.
Spending more for the sake of spending more doesn't increase performance.
Numerous reviews, thousands of users, lots of data all point to the difference between say 3200Mhz cl14, 3733mhz cl16, 4400mhz cl18 to be miniscule, as in you really really won't notice it.
For all intents and purposes, from what I can see, the infinity fabric base bandwidth has increased so much, the latency has reduced so much and with so much cache, there just isn't a lot of performance to be gained now from massively higher speeds, and by not a lot I literally mean, <1%, not 3-4%, or 15-20% as potentially was possible on Zen 1 or an Intel chip, but okay lets say <2%.
