I currently build a 14th Gen Intel 14900, AORUS Masters X z790, 96GB DDR5 5600mhz RAM (2 sticks) that way I can max out the ram if needed later on as I use Plex for RAM trasncoding. You should be fine and have that future proof. Also I picked the none K version to keep the temp down as the maxed is 65watts. No need to undervolt. I don't use ECC ram as I did not find any compatible RAM out there. Using Noctua DH12S for cooling on a Meshy 2 Xl case with 5 Noctua industrial fans.