So reinstalling OS will not matter. I have 2 computers. One rebuilt from scratch and get crashes with new CPU and motherboard. Other I upgraded to latest Windows 10 2004 build and still crashes. Only thing if the FFXIV Info tool below reports DirectX 12, not 11. Both were crashing before and started crashing I would say about 2 weeks ago or so only. For sure a game or driver issue as both started same time. Have not tried rolling back video driver and don't want to.

No resource issue with 32GB Ram, CPU or Disk. Only thing that is common across both machines is the latest NVDIA Drivers are used. Same graphics card on both.

SYSTEM_OS Windows 10 Pro 64-bit (6.2, Build 9200) (19041.vb_release.191206-1406)
SYSTEM_CPU Intel(R) Core(TM) i7-8086K CPU @ 4.00GHz (12 CPUs), ~4.0GHz
SYSTEM_CORE_NUM SYSTEM_CORE_LOGIC 12 SYSTEM_CORE_PHYSICS 6
SYSTEM_BIOS 2203
SYSTEM_LANGUAGE English (Regional Setting: English)
SYSTEM_MEMORY 32702.582MB
SYSTEM_VIRTUAL_MEMORY 134217727.875MB
SYSTEM_PAGE_FILE 37566.582MB

SYSTEM_DIRECTX_VERSION DirectX 12
SYSTEM_GRAPHICS NVIDIA GeForce GTX 1060 6GB
SYSTEM_GRAPHICS_DEVICE \\.\DISPLAY1
SYSTEM_GRAPHICS_CHIP GeForce GTX 1060 6GB
SYSTEM_GRAPHICS_MAKER NVIDIA
SYSTEM_GRAPHICS_VRAM 6052.000 MB
SYSTEM_GRAPHICS_SHARED_VRAM 16351.291 MB
SYSTEM_GRAPHICS_DAC Integrated RAMDAC
SYSTEM_GRAPHICS_DISPLAY_MODE 2560 x 1440 (32 bit) (144Hz)