I was planning a build using an AMD Ryzen 9 3900X and an AMD A320 chipset motherboard but on pcpartpicker it said I would need a bios update and it said incompatible. Will it work?
Actually, I could understand why you'd buy a 3900X and put it on an A320 motherboard.... but only if that's the only motherboard you have and plan on upgrading in the future.
If that's the case, then surely you must have a compatible processor on it right now. Just do the BIOS update with that, but do be aware that once done you may not be able to use that processor on the board again. So it's a bit risky since if even the new 3900X should wind up not working you'll be left with a bricked motherboard and two processors with no home.
But if that's not the case and your plan is to buy an A320 for that 3900X.
That's just unfathomable.
I've nothing to say.