I was having a black screen and then the nvidia drivers would recover. note that this problem has been going on with the previous drivers also but with no bsod. I just installed the new beta drivers and this is what i'm getting:
 
BTW I had a lock up 1st before the BSOD. After the lock up it followed with a black screen then no signal, then the BSOD.
It only happens while gaming in mmo's 
from what i can tell so far.
System Information (local)
--------------------------------------------------------------------------------

computer name: GAMING
windows version: Windows 7 , 6.1, build: 7600 (this info is wrong i got Windows 8.1 64bit)
windows dir: C:\WINDOWS
Hardware: ASRock, H77 Pro4/MVP
CPU: GenuineIntel Intel(R) Core(TM) i5-2500K CPU @ 3.30GHz Intel586, level: 6
4 logical processors, active mask: 15
RAM: 8467116032 total
VM: 2147352576, free: 1904066560




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Crash Dump Analysis
--------------------------------------------------------------------------------

Crash dump directory: C:\WINDOWS\Minidump

Crash dumps are enabled on your computer.

On Tue 4/8/2014 7:15:12 PM GMT your computer crashed
crash dump file: C:\WINDOWS\Minidump\040814-5343-01.dmp
This was probably caused by the following module: ntoskrnl.exe (nt+0x14DCA0) 
Bugcheck code: 0x133 (0x0, 0x501, 0x500, 0x0)
Error: DPC_WATCHDOG_VIOLATION
file path: C:\WINDOWS\system32\ntoskrnl.exe
product: Microsoft® Windows® Operating System
company: Microsoft Corporation
description: NT Kernel & System
Bug check description: The DPC watchdog detected a prolonged run time at an IRQL of DISPATCH_LEVEL or above.
This appears to be a typical software driver bug and is not likely to be caused by a hardware problem. This problem might be caused by a thermal issue. 
The crash took place in the Windows kernel. Possibly this problem is caused by another driver that cannot be identified at this time. 



On Tue 4/8/2014 7:15:12 PM GMT your computer crashed
crash dump file: C:\WINDOWS\memory.dmp
This was probably caused by the following module: nvlddmkm.sys (nvlddmkm+0xD60B8) 
Bugcheck code: 0x133 (0x0, 0x501, 0x500, 0x0)
Error: DPC_WATCHDOG_VIOLATION
file path: C:\WINDOWS\system32\drivers\nvlddmkm.sys
product: NVIDIA Windows Kernel Mode Driver, Version 337.50 
company: NVIDIA Corporation
description: NVIDIA Windows Kernel Mode Driver, Version 337.50 
Bug check description: The DPC watchdog detected a prolonged run time at an IRQL of DISPATCH_LEVEL or above.
This appears to be a typical software driver bug and is not likely to be caused by a hardware problem. This problem might be caused by a thermal issue. 
A third party driver was identified as the probable root cause of this system error. It is suggested you look for an update for the following driver: nvlddmkm.sys (NVIDIA Windows Kernel Mode Driver, Version 337.50 , NVIDIA Corporation). 
Google query: NVIDIA Corporation DPC_WATCHDOG_VIOLATION




--------------------------------------------------------------------------------
Conclusion
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2 crash dumps have been found and analyzed. A third party driver has been identified to be causing system crashes on your computer. It is strongly suggested that you check for updates for these drivers on their company websites. Click on the links below to search with Google for updates for these drivers: 

nvlddmkm.sys (NVIDIA Windows Kernel Mode Driver, Version 337.50 , NVIDIA Corporation)

If no updates for these drivers are available, try searching with Google on the names of these drivers in combination the errors that have been reported for these drivers and include the brand and model name of your computer as well in the query. This often yields interesting results from discussions from users who have been experiencing similar problems.


Read the topic general suggestions for troubleshooting system crashes for more information. 

Note that it's not always possible to state with certainty whether a reported driver is actually responsible for crashing your system or that the root cause is in another module. Nonetheless it's suggested you look for updates for the products that these drivers belong to and regularly visit Windows update or enable automatic updates for Windows. In case a piece of malfunctioning hardware is causing trouble, a search with Google on the bug check errors together with the model name and brand of your computer may help you investigate this further. 
-----------------------

Source
Windows

Summary
Shut down unexpectedly

Date
‎4/‎8/‎2014 3:16 PM

Status
Solution available

Problem signature
Problem Event Name: BlueScreen
Code: 133
Parameter 1: 0
Parameter 2: 501
Parameter 3: 500
Parameter 4: 0
OS version: 6_3_9600
Service Pack: 0_0
Product: 256_1
OS Version: 6.3.9600.2.0.0.256.48
Locale ID: 1033

Extra information about the problem
Bucket ID: 0x133_DPC_nvlddmkm+d60b8
-------------------------------------------------

The computer has rebooted from a bugcheck. The bugcheck was: 0x00000133 (0x0000000000000000, 0x0000000000000501, 0x0000000000000500, 0x0000000000000000). A dump was saved in: C:\WINDOWS\MEMORY.DMP. Report Id: 040814-5343-01.

-----------------------------------------------

I'm getting a new power supply tomorrow. Will see if it solves this issue.

Any feedback or advice would be greatly appreciated.

That certainly sounds like a possible conflict between your iGPU and Nvidia drivers...
 
Your MB supports "Lucid Virtu Universal MVP" which is a software to run both Nvidia and Intel GPU drivers
This -must- be disabled as it does NOT work correctly.
 
You need to post up your exact config details, including monitor setup
Also post how you installed Windows 8
The program you are using to post your hardware is outdated and corrupted, it should be removed from your system...
*unless you ARE running a VM
-------------------------------------------------
 
Make sure that ONE monitor is connected to ONLY the videocard
make sure that the onboard GPU is disabled (read your MB manual)
make sure that any iGPU (intel) drivers are NOT loading at boot (these are (2) Intel common user interface drivers) 
 
How much experience to you have running Windows 8?
Did you do last weeks 8.1 "update"?
 

Good to see you're not receiving a BSOD anymore. The black screen problem with ffxiv arr may be happening because the GPU is unstable with that game, to correct the black screen you could try doing the following...
 
Downclock GPU using EVGA Precision X. 
 
Set both GPU Clock Offset & Mem Clock Offset to -105 using the latest version of precision x. If you can't set both to -105 using the latest version of precision x download the older version here. If your GPU is unstable in any way this will help stabilize it. 
 
NOTE: Make sure to uninstall the latest version of precision x before installing the older version, you must select "NO" to saving profiles & reboot the PC before installing the older version, you will need to follow these steps again when re-installing the latest version.
 

If you're no longer receiving a black screen in ffxiv arr after downclocking your GPU you should RMA the card. The video card should be 100% stable @ stock clocks in all games without having to downclock the GPU to gain stability.

xeonotrix
Thank you for responding Sajin. So the question is can a specific  game make the card unstable even tho everything else is running fine?

No problem. A specific game or benchmark shouldn't make the card unstable, all games & benchmarks do use the GPU differently though, nothing the card shouldn't be able to handle at default clocks speeds. Any crashing, black screening caused by games or benchmarks @ default clocks that can be corrected by downlocking the GPU indicate the GPU is unstable and needs to be RMA'd.

Have you ever been able to run ffxiv arr for three hours before? Or were the crashes more frequent at stock clocks?

Do you experience crashing in any other games or benchmarks other than FF? If not it's probably the game. You could try doing the TDR adjustment along with performing a clean boot of windows to clean up background processes for testing.
 
Perform a clean boot of windows. 
Follow the instructions HERE. 

Try with everything disabled first.

I have noticed crashing on FF when I tried the game for a bit, ran into random crashing, turned out that I just needed to re install .netframework 4.5. This resolve my crashing. With my friends rig we had to role his drivers back a few until this game was stable again.

It seems that the black screen issue is something that nvidia is trying to reciprocate. 
 
https://forums.geforce.com/default/topic/648176/geforce-drivers/monitor-display-blank-screen-issue-after-driver-update-updated-1-23-14-/1/
 
ManuelG "It looks like we have finally been able to figure out which changelist introduced this behavior and finally have a fix that we have tested and verify works. This fix will be in our next driver release. As such, I am going to unpin this thread."
 
There is also this from microsoft:
http://support.microsoft.com/kb/2923766/en-us
 
Maybe this might relate to my problem but maybe not. In the meantime I will keep testing that specific game that causes the black screen.