Yes, it's 2 sticks of kingston fury. I haven't tried having just one in.
UPDATE
I have been messing with it a bit more and, I'm still not completely sure, but it seems that disabling the EXPO profile has made it so the PC now boots every time instead of only half the time, and it also boots...
I've posted this to Reddit but I've made an account to ask here since I could use all the help I could get trying to figure out this problem.
So I've just built a new PC with an MSI X670-P Wifi board, Ryzen 9 7900X, and 4080. Two sticks of 16GB DDR5 6000MHz Kingston Fury. I'm writing this...