Hard crash at random times

[ThetaCoder]

When I bought the ram I bought 2 kits, so 4 sticks in total. Bought at the same time, to avoid the problems of possibly different chip batches, different chip providers, etc.

[Demon_Giri]

Buying them at the same time still doesn't necessarily guarantee that. You usually want to buy them as one pack for that.

Also, I could be wrong here, but I think motherboard QVL listings are meant exclusively. Meaning, the QVL has the 32GBx2 confirmed on the list, but hasn't necessarily confirmed that using two of those sets is stable/supported. Yes, the motherboard's maximum capacity and speed are above that, but these days I wouldn't personally put a lot of trust in just that alone.

That said, they could be fine together, regardless. There's nothing saying they're for-sure problematic, even in different packs.

Again, I fully understand that I'm suggesting there's instability with hardware that has otherwise been fine in literally everything else, and I might not even be looking in the right place for your particular situation here, but I do know that FFXIV's sensitivity is pretty high, so the only reason I even suggest these things or put in this time is with the goal of YOU being able to play FFXIV in mind. If you wanted to just quit FFXIV or stop playing until MAYBE they fix it, then I'd say don't bother trying to dig into it, but I just did this for a friend of mine who basically only plays FFXIV, so "just don't play your favorite game" wasn't really an option, and waiting around for SE seems like a huge gamble to me.

If you're willing, I'd say it's worth trying the game with only two sticks installed in dual channel. Since you said you didn't mess with most of the BIOS settings, I don't imagine they're XMP'd by default, so they're probably running at 4800. With that in mind, they should be pretty stable at their speed, but there's still a small chance the motherboard doesn't like being in quad channel with them, or that they don't quite like eachother, despite seeming fine otherwise. Even if you'd bought them all in a pack, modern hardware in the last few years hasn't been super dependable with quad stick configurations. It might be worth trying unless you have better ideas.

Might not fix it. Can't give any guarantees there, but it's a relatively quick and easy change to make just to try.

[ThetaCoder]

Just got done running a sweep with the current version Memtest, 4 test passes, all good cross all sticks.

Yes, the 'auto' feature fort he RAM doesn't turn on the XMP, so they are BIOS running at 4800 rather than the 6000 they are rated for.

As for your under voltage and wattage settings, I did not see anywhere to put those in the 'tweaks' section of the BIOS.