BSOD DPC Watchdog Violation Windows Kernel Fail

I have taken a look at 6 dumps and there are a few drivers flagged.

Nvidia Video driver, do you have software installed from Nvidia?
If so,

• search msconfig and open it,
• go to the tab services
• check 'Hide Microsoft services'
• search for a service called Nvidia Streaming Kernel Service, Nvidia Streamer Service or something that looks like it
• disable this service
• click apply, click ok
• reboot if asked

Code:

0: kd> lmvm nvlddmkmstart             end                 module name
fffff801`34ba0000 fffff801`35688000   nvlddmkm   (deferred)             
    Image path: \SystemRoot\system32\DRIVERS\nvlddmkm.sys
    Image name: nvlddmkm.sys
    Timestamp:        Thu Jul 23 02:15:19 2015 (55B03217)
    CheckSum:         00AA405B
    ImageSize:        00AE8000
    Translations:     0000.04b0 0000.04e4 0409.04b0 0409.04e4

Realtek LAN driver, have you installed a windows 8.1 driver? It is downgraded compared with the post of derekimo

Code:

0: kd> lmvm rt640x64start             end                 module name
fffff801`33cc0000 fffff801`33d99000   rt640x64 T (no symbols)           
    Loaded symbol image file: rt640x64.sys
    Image path: \SystemRoot\System32\drivers\rt640x64.sys
    Image name: rt640x64.sys
    Timestamp:        Tue May 05 18:21:03 2015 (5548EDEF)
    CheckSum:         000E9B0E
    ImageSize:        000D9000
    Translations:     0000.04b0 0000.04e4 0409.04b0 0409.04e4

2 AMD drivers, I'm not sure what they're for, but check AMD site for updates.

Code:

0: kd> lmvm amdsatastart             end                 module name
fffff801`31660000 fffff801`31674000   amdsata  T (no symbols)           
    Loaded symbol image file: amdsata.sys
    Image path: \SystemRoot\System32\drivers\amdsata.sys
    Image name: amdsata.sys
    Timestamp:        Wed Oct 07 22:13:09 2009 (4ACCF655)
    CheckSum:         0001C14A
    ImageSize:        00014000
    Translations:     0000.04b0 0000.04e4 0409.04b0 0409.04e4

Code:

0: kd> lmvm amdxatastart             end                 module name
fffff801`31700000 fffff801`3170b000   amdxata    (deferred)             
    Image path: \SystemRoot\System32\drivers\amdxata.sys
    Image name: amdxata.sys
    Timestamp:        Wed Oct 07 22:13:10 2009 (4ACCF656)
    CheckSum:         00007A58
    ImageSize:        0000B000
    Translations:     0000.04b0 0000.04e4 0409.04b0 0409.04e4