FFXIV and AMD Ryzen is maybe conflicting with eachother causing FF CTD with no error

Hello

Much like I looked into a potential problem on Appdata Event ID 65 causing crashes, it no longer holds any weight, as all the solutions I looked to all pointed to Ryzen itself being the issue and I believe this should be investigated by the correct teams for the game.

The problem: FFXIV is crashing without error

The vague evidence:
https://forum.square-enix.com/ffxiv/...out-error-code
https://forum.square-enix.com/ffxiv/...-without-error
https://forum.square-enix.com/ffxiv/...-without-error

These 3 posts are all on AMD Ryzen, including myself on a Ryzen R7 1700. Initially I assumed this was because of Nvidia/Ryzen conflicting as me and 2 of these posts use Ryzen/Nividia, but J3thr0's post has an AMD R9 390 GPU.

Here's what's led to me believing Ryzen is having an issue with FF

The solutions the Tech Support mods offered was:
Turn off Full Screen Optimization - Didn't work
Ensured our hardware wasn't overheating - Hardware temps were safe
Removed unnecessary USB and Audio devices - Didn't work
Updated GPU drivers - Didn't work
Installed on the C: Drive - Didn't work
Perform a clean boot - Didn't work
Removed any potential mod injectors/overlays (Discord, Steam etc) - Didn't work

This is why I believe FFXIV and Ryzen aren't happy with eachother, and it appears to be sudden on how this is an issue now, and not a few months ago. Windows 10 had a major update in May - My issues stemmed with Final Fantasy started here.

Anandtech's post investigates AMD's Hyperthreading on the Threadripper 3990x, suggesting that turning off SMT as a solution. However this is not viable - We'd lose half our cores on the Ryzen platform if we turned it off + requires technical know-how to turn it off on the player's part.
https://www.anandtech.com/show/15483...3990x-review/3

I do not have the technical expertise to investigate this claim further nor do I have the equipment but I do believe this is as far as I can go with these claims. I hope this might help the correct teams to investigate this issue further.

Furthermore to add onto all of this: I don't like speaking out of my own behind, however FFXIV is the only game that crashes. I can play other games for absolutely hours and not have a crash, but FFXIV just has absolutely random crashes out of nowhere. It doesn't matter what content I'm doing - AFKing, raiding, roulettes, trials, changing zones, heck, even just typing into chat - I can crash at any moment.

Seconded. My wife has been having this issue for the past two days. Yesterday it was just a specific spot in New Gridania; logging onto my PC and moving her fixed the issue. It was a direct crash to desktop, and she couldn't get past any loading screens.

Today it happened in Limsa Lominsa. I moved her again. We queued for Qitana Ravel, it crashed continually. Now she cannot log in at all.

She has tried using the "Reset" tool in the launcher, and that will work very briefly.
She has swapped from DirectX11 to DirectX9, and still received crashes upon login.

It's worth noting that she has been playing all day on both of these days with no issue, only for the issue to happen suddenly in the evenings with no end in sight.