BSOD random crashes Windows 8.1

well your bugcheck was in networking code. it looks like a network driver attempted to delete the same memory twice or something corrupted its data stored in memory.
here is the actual error code:
ERROR_CODE: (NTSTATUS) 0xc0000409 - The system detected an overrun of a stack-based buffer in this application. This overrun could potentially allow a malicious user to gain control of this application.

With this error I would start cmd.exe as an admin then run
sfc.exe /scannow
then run
dism.exe /online /cleanup-image /restorehealth
then run a malwarebytes scan (free version)

Looks like your network driver is current.
\SystemRoot\system32\DRIVERS\Rt630x64.sys Wed Jan 14 22:08:17 2015

I am not sure as to the actual cause of the error.
I would remove your overclocking driver:
\C:\Program Files\AMD\ATI.ACE\Fuel\amd64\AODDriver2.sys Tue Feb 11 03:06:52 2014
and reboot and see if you can get another bugcheck.

if you do, I would then start cmd.exe as an admin then run
verifier.exe /standard /all
then reboot
this will force windows to do extra error checking on drivers and will force a bugcheck if a driver corrupts memory.
note: use
verifier.exe /reset
to turn off the verification after you are done testing.