Date & Time: Since about 11/9/17 through current
Frequency: Almost every time
Steps:
1. Log in to FFXIV launcher
2. Select character from character selection screen
3. Wait during the usual loading screen, computer suddenly "powers down" about the time the loading screen would finish.

This most frequently happens when attempting to log in. The computer doesn't "power down" exactly in the sense of normal shutdown. There's no output from the computer and all fans/lights turn off as if the computer is off, but the power light remains on and the computer cannot be restarted unless I first toggle the main power switch directly on the PSU. Unfortunately, this kind of error doesn't seem to leave any kind of error code or log even though I've attempted to disable the automatic restart on system failure which would normally let me see the BSOD on a critical failure. The windows event logger doesn't even have any useful information.

I attempted to switch to use DX9 instead of DX11 as I had been using. This seemed to resolve the problem for a time, but a similar crash happened during a run of the Royal City of Rabanastre. After the crash, when I attempted to restart and log in, it would immediately crash again after selecting my character. I did notice that when I was copying the system specs that the DX11 support switch was unexpectedly on again, so it's possible that the crash in Royal City happened while DX11 was enabled. I have been able to run FFXIV using DX11 flawlessly since the option was available up until the end of last week.

I've tested my hardware thoroughly to help rule out any hardware failures:
* CPU burn-in test caused no problems
* 6+ hours of RAM testing reported no errors
* 2+ hours of GPU burn-in caused no problems
* Did tests/checked on SSD and HDD and found no errors

I also tried to rule out an unexpected corruption in the game by uninstalling and re-installing FFXIV. The problem persisted exactly as before even after the reinstall.

Based on the timing, I suspect something from 4.11 or the hotpatch that followed it is causing the issue.

■ PC Specs

-=-=-=-=- System Information -=-=-=-=-


-=-=-=-=-=-=- FFXIV Information -=-=-=-=-=-=-

MyDocument C:\Users\Tora\Documents
FINAL FANTASY XIV - A Realm Reborn C:\Program Files (x86)\SquareEnix
FINAL FANTASY XIV - A Realm Reborn Language 1 Region 2
ProxyEnable 0
ProxyServer unspecified
ProxyOverride *.local


-=-=-=-=-=-=- System Information -=-=-=-=-=-=-

SYSTEM_OS Windows 10 Home 64-bit (6.2, Build 9200) (15063.rs2_release.170317-1834)
SYSTEM_CPU AMD Phenom(tm) II X4 965 Processor (4 CPUs), ~3.4GHz
SYSTEM_CORE_NUM SYSTEM_CORE_LOGIC 4 SYSTEM_CORE_PHYSICS 4
SYSTEM_BIOS V10.3
SYSTEM_LANGUAGE English (Regional Setting: English)
SYSTEM_MEMORY 8156.234MB
SYSTEM_VIRTUAL_MEMORY 134217727.875MB
SYSTEM_PAGE_FILE 11612.234MB
SYSTEM_STORAGE C:\ SYSTEM_HARDDISK_DRIVE SYSTEM_TOTALDISC_SPACE 223.018GB SYSTEM_FREEDISC_SPACE 125.086GB
SYSTEM_STORAGE D:\ SYSTEM_HARDDISK_DRIVE SYSTEM_TOTALDISC_SPACE 0.098GB SYSTEM_FREEDISC_SPACE 0.064GB
SYSTEM_STORAGE F:\ SYSTEM_HARDDISK_DRIVE SYSTEM_TOTALDISC_SPACE 48.824GB SYSTEM_FREEDISC_SPACE 15.827GB
SYSTEM_STORAGE G:\ SYSTEM_HARDDISK_DRIVE SYSTEM_TOTALDISC_SPACE 416.395GB SYSTEM_FREEDISC_SPACE 299.231GB
SYSTEM_DIRECTX_VERSION DirectX 12
SYSTEM_GRAPHICS NVIDIA GeForce GTX 960
SYSTEM_GRAPHICS_DEVICE \\.\DISPLAY1
SYSTEM_GRAPHICS_CHIP GeForce GTX 960
SYSTEM_GRAPHICS_MAKER NVIDIA
SYSTEM_GRAPHICS_VRAM 2016.688 MB
SYSTEM_GRAPHICS_SHARED_VRAM 4078.117 MB
SYSTEM_GRAPHICS_DAC Integrated RAMDAC
SYSTEM_GRAPHICS_DISPLAY_MODE 1600 x 900 (32 bit) (60Hz)
SYSTEM_GRAPHICS_DRIVER C:\WINDOWS\System32\DriverStore\FileRepository\nv_ref_pubwu.inf_amd64_841d56cc807f1f4d\nvldumdx.dll,C:\WINDOWS\System32\DriverStore\FileRepository\nv_ref_pubwu.inf_amd64_841d56cc807f1f4d\nvldumdx.dll,C:\WINDOWS\System32\DriverStore\FileRepository\nv_ref_pubwu.inf_amd64_841d56cc807f1f4d\nvldumdx.dll,C:\WINDOWS\System32\DriverStore\FileRepository\nv_ref_pubwu.inf_amd64_841d56cc807f1f4d\nvldumdx.dll
SYSTEM_GRAPHICS_DRIVER_VERSION 22.21.0013.8569
SYSTEM_GRAPHICS_DRIVER_DATE 9/15/2017 18:00:00
SYSTEM_GRAPHICS_DRIVER_LANGUAGE English
3.0
SYSTEM_GRAPHICS_PIXEL_SHADER 3.0
SYSTEM_GRAPHICS_VERTEX_TEXTURE SYSTEM_SUPPORT
SYSTEM_SOUND Headset Earphone (Razer Kraken 7.1 V2)
SYSTEM_SOUND_DEVICE_ID {A816649F-A350-4D68-B12E-180DDE83F1AD}
SYSTEM_SOUND_DEVICE_NAME USBAUDIO.sys
SYSTEM_SOUND_DRIVER_VERSION 6.02.15063.0000
SYSTEM_SOUND_DRIVER_LANGUAGE English
SYSTEM_SOUND_DRIVER_DATE 9/8/2016 00:00:00
SYSTEM_SOUND Speakers (Realtek High Definition Audio)
SYSTEM_SOUND_DEVICE_ID {FB3F4117-3BC0-4B47-9B8A-6ECCE1E4F785}
SYSTEM_SOUND_DEVICE_NAME RTKVHD64.sys
SYSTEM_SOUND_DRIVER_VERSION 6.00.0001.7910
SYSTEM_SOUND_DRIVER_LANGUAGE English
SYSTEM_SOUND_DRIVER_DATE 8/16/2016 00:00:00
SYSTEM_INPUT {6F1D2B60-D5A0-11CF-BFC7444553540000}
SYSTEM_INPUT_NAME Mouse
SYSTEM_INPUT_REMARKS SYSTEM_GAMEPAD_AXIS 3 SYSTEM_GAMEPAD_BUTTON 5 SYSTEM_GAMEPAD_FOV 0
SYSTEM_INPUT {6F1D2B61-D5A0-11CF-BFC7444553540000}
SYSTEM_INPUT_NAME Keyboard
SYSTEM_INPUT_REMARKS SYSTEM_GAMEPAD_AXIS 0 SYSTEM_GAMEPAD_BUTTON 128 SYSTEM_GAMEPAD_FOV 0
SYSTEM_INPUT {A650A710-634B-11E7-8005444553540000}
SYSTEM_INPUT_NAME Razer DeathAdder Elite
SYSTEM_INPUT_REMARKS SYSTEM_GAMEPAD_AXIS 0 SYSTEM_GAMEPAD_BUTTON 573 SYSTEM_GAMEPAD_FOV 0
SYSTEM_INPUT {8BAF2DA0-634B-11E7-8001444553540000}
SYSTEM_INPUT_NAME Razer Ornata Chroma
SYSTEM_INPUT_REMARKS SYSTEM_GAMEPAD_AXIS 0 SYSTEM_GAMEPAD_BUTTON 1 SYSTEM_GAMEPAD_FOV 0
SYSTEM_INPUT {A6511C40-634B-11E7-8006444553540000}
SYSTEM_INPUT_NAME Razer DeathAdder Elite
SYSTEM_INPUT_REMARKS SYSTEM_GAMEPAD_AXIS 0 SYSTEM_GAMEPAD_BUTTON 3 SYSTEM_GAMEPAD_FOV 0
SYSTEM_INPUT {A6511C40-634B-11E7-8007444553540000}
SYSTEM_INPUT_NAME Razer DeathAdder Elite
SYSTEM_INPUT_REMARKS SYSTEM_GAMEPAD_AXIS 0 SYSTEM_GAMEPAD_BUTTON 1 SYSTEM_GAMEPAD_FOV 0
SYSTEM_INPUT {E730EE60-12D0-11E6-8001444553540000}
SYSTEM_INPUT_NAME Microsoft Nano Transceiver 1.1
SYSTEM_INPUT_REMARKS SYSTEM_GAMEPAD_AXIS 0 SYSTEM_GAMEPAD_BUTTON 573 SYSTEM_GAMEPAD_FOV 0
SYSTEM_INPUT {E73A1620-12D0-11E6-8007444553540000}
SYSTEM_INPUT_NAME Microsoft Nano Transceiver 1.1
SYSTEM_INPUT_REMARKS SYSTEM_GAMEPAD_AXIS 0 SYSTEM_GAMEPAD_BUTTON 3 SYSTEM_GAMEPAD_FOV 0
SYSTEM_INPUT {47298AB0-63FD-11E7-8001444553540000}
SYSTEM_INPUT_NAME Razer Kraken 7.1 V2
SYSTEM_INPUT_REMARKS SYSTEM_GAMEPAD_AXIS 3 SYSTEM_GAMEPAD_BUTTON 3 SYSTEM_GAMEPAD_FOV 0
SYSTEM_INPUT {E73A3D30-12D0-11E6-8008444553540000}
SYSTEM_INPUT_NAME Microsoft Nano Transceiver 1.1
SYSTEM_INPUT_REMARKS SYSTEM_GAMEPAD_AXIS 0 SYSTEM_GAMEPAD_BUTTON 0 SYSTEM_GAMEPAD_FOV 0
SYSTEM_INPUT {472DA960-63FD-11E7-8002444553540000}
SYSTEM_INPUT_NAME Razer Kraken 7.1 V2
SYSTEM_INPUT_REMARKS SYSTEM_GAMEPAD_AXIS 0 SYSTEM_GAMEPAD_BUTTON 0 SYSTEM_GAMEPAD_FOV 0
SYSTEM_INPUT {8BAFA2D0-634B-11E7-8002444553540000}
SYSTEM_INPUT_NAME Razer Ornata Chroma
SYSTEM_INPUT_REMARKS SYSTEM_GAMEPAD_AXIS 0 SYSTEM_GAMEPAD_BUTTON 573 SYSTEM_GAMEPAD_FOV 0
SYSTEM_INPUT {A6514350-634B-11E7-8008444553540000}
SYSTEM_INPUT_NAME Razer DeathAdder Elite
SYSTEM_INPUT_REMARKS SYSTEM_GAMEPAD_AXIS 0 SYSTEM_GAMEPAD_BUTTON 1 SYSTEM_GAMEPAD_FOV 0
SYSTEM_INPUT {472DD070-63FD-11E7-8003444553540000}
SYSTEM_INPUT_NAME Razer Kraken 7.1 V2
SYSTEM_INPUT_REMARKS SYSTEM_GAMEPAD_AXIS 0 SYSTEM_GAMEPAD_BUTTON 0 SYSTEM_GAMEPAD_FOV 0
SYSTEM_INPUT {8BAFA2D0-634B-11E7-8003444553540000}
SYSTEM_INPUT_NAME Razer Ornata Chroma
SYSTEM_INPUT_REMARKS SYSTEM_GAMEPAD_AXIS 0 SYSTEM_GAMEPAD_BUTTON 3 SYSTEM_GAMEPAD_FOV 0
SYSTEM_INPUT {E7318AA0-12D0-11E6-8002444553540000}
SYSTEM_INPUT_NAME CTE-440-U V4.0-3
SYSTEM_INPUT_REMARKS SYSTEM_GAMEPAD_AXIS 0 SYSTEM_GAMEPAD_BUTTON 0 SYSTEM_GAMEPAD_FOV 0
SYSTEM_INPUT {8BAFC9E0-634B-11E7-8004444553540000}
SYSTEM_INPUT_NAME Razer Ornata Chroma
SYSTEM_INPUT_REMARKS SYSTEM_GAMEPAD_AXIS 0 SYSTEM_GAMEPAD_BUTTON 1 SYSTEM_GAMEPAD_FOV 0


-=-=-=-=-=-=- Application Information -=-=-=-=-=-=-

FFXIVLauncher
Microsoft Edge
In-Game Bugs - Post New Thread ‎- Microsoft Edge
Microsoft Edge
Welcome to the "In-Game Bugs" Forum! (READ THIS FIRST) ‎- Microsoft Edge
Microsoft Edge
Ariyala's Final Fantasy XIV Toolkit and 10 more pages ‎- Microsoft Edge
Microsoft Edge
Windows Shell Experience Host
Microsoft Edge
Microsoft Edge
Microsoft Edge


-=-=-=-=-=-=- Install Information -=-=-=-=-=-=-

Adobe Photoshop 7.0
Advanced Combat Tracker (remove only)
Google Chrome
NVIDIA Stereoscopic 3D Driver
Razer Chroma SDK Core Components
Samsung C460 Series
Samsung Easy Printer Manager
Samsung Printer Diagnostics
Uninstall Samsung Printer Software
Apple Application Support (32-bit)
Razer Synapse
FINAL FANTASY XIV - A Realm Reborn
Microsoft Visual C++ 2015 Redistributable (x86) - 14.0.23918
Apple Software Update
Google Update Helper
Microsoft Visual C++ 2008 Redistributable - x86 9.0.30729.6161
LibreOffice 4.4.3.2
Microsoft Visual C++ 2015 x86 Minimum Runtime - 14.0.23918
Microsoft Visual C++ 2015 x86 Additional Runtime - 14.0.23918
Action Replay PowerSaves 3DS version 1.51
Microsoft Visual C++ 2015 Redistributable (x64) - 14.0.24215
Realtek High Definition Audio Driver
TeamSpeak 3 Client
Vulkan Run Time Libraries 1.0.54.1
Common Desktop Agent
Windows 10 Update and Privacy Settings
Microsoft Visual C++ 2015 x64 Minimum Runtime - 14.0.24215
Bonjour
iTunes
Apple Application Support (64-bit)
Ansel
NVIDIA 3D Vision Driver 385.69
NVIDIA Control Panel 385.69
NVIDIA Graphics Driver 385.69
NVIDIA Update 10.4.0
NVIDIA HD Audio Driver 1.3.34.27
NVIDIA Install Application
NVIDIA Display Container
NVIDIA Display Container LS
NVIDIA Display Watchdog Plugin
NVIDIA Display Session Container
NVIDIA Update Core
Apple Mobile Device Support
Microsoft Visual C++ 2015 x64 Additional Runtime - 14.0.24215


-=-=-=-=-=-=- Proccess Information -=-=-=-=-=-=-

C:\Program Files (x86)\NVIDIA Corporation\Update Core\NvBackend.exe 00002370
C:\Program Files (x86)\Razer\Razer_Kraken0510_Driver\Drivers\SysAudio\Kraken0510Helper.exe 00002B64
C:\Program Files (x86)\Razer\Synapse\RzSynapse.exe 00002998
C:\Program Files (x86)\SquareEnix\FINAL FANTASY XIV - A Realm Reborn\boot\ffxivlauncher.exe 000025F4
C:\Program Files (x86)\SquareEnix\FINAL FANTASY XIV - A Realm Reborn\boot\ffxivsysinfo64.exe 00001B6C
C:\Program Files\Common Files\Common Desktop Agent\CDASrv.exe 00002854
C:\Program Files\NVIDIA Corporation\Display\nvtray.exe 00002204
C:\Program Files\Realtek\Audio\HDA\RtkNGUI64.exe 00002278
C:\Program Files\Windows Defender\MSASCuiL.exe 000027F8
C:\Program Files\WindowsApps\Microsoft.SkypeApp_12.8.487.0_x64__kzf8qxf38zg5c\SkypeHost.exe 00001C28
C:\Program Files\iTunes\iTunesHelper.exe 000028D0
C:\Users\Tora\AppData\Local\Microsoft\OneDrive\OneDrive.exe 000028F8
C:\WINDOWS\Explorer.EXE 000010B8
C:\WINDOWS\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdge.exe 00002418
C:\WINDOWS\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdgeCP.exe 00001DD8
C:\WINDOWS\SystemApps\ShellExperienceHost_cw5n1h2txyewy\ShellExperienceHost.exe 00000EA4
C:\WINDOWS\system32\ApplicationFrameHost.exe 00002080
C:\WINDOWS\system32\DllHost.exe 000021B0
C:\WINDOWS\system32\browser_broker.exe 00002488
C:\Windows\System32\InstallAgent.exe 00001EE4
C:\Windows\System32\Macromed\Flash\FlashUtil_ActiveX.exe 00000E58
C:\Windows\System32\RuntimeBroker.exe 00001434
C:\Windows\System32\smartscreen.exe 000003C4
C:\Windows\SystemApps\Microsoft.Windows.Cortana_cw5n1h2txyewy\SearchUI.exe 000009E0
c:\windows\system32\sihost.exe 00000348
c:\windows\system32\svchost.exe 00002BB0
c:\windows\system32\taskhostw.exe 00000720

-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-