Just plopped the 3800X into my Asus mATX B450M-Pro. Dialing in the Memory right now. 1900MHz IF seems fine, tried 2000, got a hard lock. Had to remove the battery. 3800 mem, Cas16 so far, 1.375v. ( I have 2 sticks of 8GB GSkill 3200Cas14) Wouldn't take Cas17 by what it says in the Bios timings. Just refused it and stayed at 18. I Went from 18 to 16 fine, have just left the rest on auto for now, changing one by one. Dram calculator comes up with C14 timings and 1.45v recommended voltage...we'll see Running a couple of memory test passes after a few changes. Still on the 22.214.171.124 AB bios. 51°C and 1.4V in Bios doing nothing, stock box cooling. Waiting on a couple more waterblock connectors. (One i was going to use has a wiggle i dont like, its a previously used one, also need another 90° tube to tube connector) Going to have the pump/res hidden in the dual 5 1/4 inch bay (Fractal design Arc Mini R2, I bought this a while ago, as I have one already and really, really liked it, both black with windows.) The Large 240mm is up front. Dual Push-Pull Noctuas up front (4), one Noctua on rear. Making sure I have positive pressure in the case.