Problems with new system

I have recently updated my system, here are the specs:

CPU: Xeon e5-2699 v3 (18 core)
Memory : HK Hynix 16 Gb DDR4 ECC x 8
Motherboard: ASRock X99 Taichi
SSD: Samsung 840 EVO
HDD: Seagate 1TB
Video Card: nVidia Geforce GTX Titan X
Cooling: Corsair Hydro H115i Extreme

I have started having an issue now, where my system will randomly shut off (as if it looses power). It has no patter, at least not one that appears. Now, the odd thing is, I see a lot of stuff in my system events that are concerning. The errors that happen before the shutdown are as follows:

Warning:e1rexpress:ID27: Intel(R) I211 Gigabit network connection Network link is disconnected.

Error:IIS-APPHOSTSVC:ID9010: The application Host Helper Service encountered an error trying to access the root history directory.

Error:Service Control Manager:ID7001: The NeTcpActivator service depents on the NetTcpPortSharing service which failed to start because of the following error: The service cannot be started.

Error:Service Control Manager:ID7009: A timeout was reached (30000 milliseconds) while waiting for the asComSvc service to connect.

Error:Service Control Manager:ID7000:The asComSvc service failed to start due to the following error: The service did not respond to the start or control request in a timely fashion.

ErroristributedCOM:ID10016:The application-specific permission settings do not grant Local Activation permission for the COM Server application with CLSID... (This happens three times in a row, once by "SYSTEM" and twice by "LOCAL SERVICE"

Then, when i go into applications section, I have an error like this one:

Error: EFS : ID 4401: 7.488: EFS service failed to provision user for EDP. Error code: 0x80070005.

The shutdowns don't seem to be the same every time, the interesting part is, I've had this rig for about two weeks now, and it didn't start doing this until I played GTA 5 for the first time about three days ago. So, this is a really interesting fact and I'm not sure it is a coincidence or related. Any ideas?

One more thing, when the PC shuts off, I cannot power it back on, unless I unplug it from the wall and wait a few minutes.