Crystal Tower and large populations areas cause the game to crash

[Rezzo]

Ever since patch 2.1 was initiated I am no longer able to play this game in any highly populated areas. Once I enter a highly populated area such as Crystal Tower, Revenant's Toll, and FATEs like Odin and Behemoth, the game will crash instantly.

For example, I was in a Crystal Tower run and as soon as the first area boss fight started, my game crashed. When I tried to log back in, the game crashes again even during the loading screen.

Example screenshot:

When in Revenant's Toll, the game will be running smooth for a few minutes, then crash with the same error message as shown in the pic above.
As far as the mega FATEs like Odin and Behemoth, as soon as I can "see" either mob, the game crashes.

I've tried changing video settings, dropping them to the minimum levels, but that does not help. It also doesn't matter if the game is in full screen mode, or windowed mode.
I'm running two Radeon HD 7870s, and I've tried with CrossFireX on and off. I've also checked to make sure I have the latest video drivers.
I have 32GB of RAM, and I do normally play through a RAMDrive (set to 16GB), but after this problem occurred I even tried playing from a HD like normal, but that does not fix the problem either.
At this point I'm really out of ideas, so if anyone can think of something I can try on my end, please let me know. Otherwise, SE please fix what you broke in the game since patch 2.1 was implemented.

[HoroOkami]

Hello Rezzo,
hello FFXIV:ARR Devs,

I also encountered problems with the Crystal Tower dungeon. My 2nd machine crashes to desktop when the final boss encounter is up, while my 1st machine is running just fine. The machine's specs are almost identical.
During this fight, when the end boss uses his massive AoE strikes/spells, it seems to trigger the crash and the game client quits to the desktop without any error message.
Attempts to log in and continue playing fail continuously. Either the client crashes right after character selection and loading the Crystal Tower. Or it crashes some time after, again when the boss is using his massive AoE skills.

PC facts:
Windows 7 Ultimate 64-bit (6.1, Build 7601) Service Pack 1
Intel Core i7-3930K CPU @ 3.20GHz (12 CPUs), ~3.2GHz
BIOS-Date: 04/18/13
Client Language: German (Deutsch)
16 GByte RAM
120 GByte Solid-State-Drive, 22 GByte free
DirectX 11
NVIDIA GeForce GTX 780, 3 GByte DDR5
Resolution: 1920x1080 (32bit) (60Hz)
Display Driver Version: 9.18.0013.3221
Display Driver Date: 12/19/2013

[Marishi-Ten]

When a program crashes, it will push out dump logs that give the exact reason why it crashed. Can you post the logs so we can take a look? Sounds like a Kernel Panic (or whatever Windows calls it)

[HoroOkami]

Hello Marishi-Ten,

here is the event log from yesterday's Crystal Tower session. There are about 6 entries in the event manager, all with the same exception code "0xc0000005" / error offset "0x008ecc7d".

- System 
  - Provider 
    [ Name]        Application Error 
  - EventID        1000 
    [ Qualifiers]  0 
    Level          2
    Task           100 
    Keywords       0x80000000000000 
  - TimeCreated
    [ SystemTime]  2014-02-03T21:59:04.000000000Z
    EventRecordID  13335
    Channel        Application 
    Computer       Jiii-PC
    Security
- EventData 
    ffxiv.exe 
    1.0.0.0 
    52e14ba1 
    ffxiv.exe 
    1.0.0.0 
    52e14ba1 
    c0000005 
    008ecc7d 
    d1c 
    01cf212b10ecf040 
    C:\Program Files (x86)\SquareEnix\FINAL FANTASY XIV - A Realm Reborn\game\ffxiv.exe 
    C:\Program Files (x86)\SquareEnix\FINAL FANTASY XIV - A Realm Reborn\game\ffxiv.exe 
    651ccfad-8d1e-11e3-acc3-74d02b2aff6e

Further, I updated to the latest NVIDIA beta drivers, namely 334.67.

**UPDATE**
The crash can be reconstructed.
It happens when Acheron uses either the green "windy" area spell or the spell with the red circles behind him.
Also, setting to the lowest possible graphics quality doesn't do the trick.

Any more ideas how to fix this? Maybe call for help @SE support?

**SOLUTION**
Uninstalling and installing anew FFXIV:ARR solved the issue.
BTW I didn't know there was no option to check or repair the FFXIV:ARR installation, so you're pretty much forced to uninstall completely.
Seems like the memory access violation was caused by a pointer pointing to a invalid resource location or something like that.