BSOD Issues on new PC (0x00000050, 0x00003b, 0x0000001a)

Hello,
I received my new custom build PC recently and I am currently having issues with bluescreens as mentioned in the title.
To describe my problem in more detail: IT first accrued while playing assassins creed black flag and since then I was not able to get rid of it in any way. I am also not able to boot up the safe mode properly anymore since it instantly goes into the system recovery mode and then crashes again. The most frequent occurring bluescreen is the 1a followed by the 50 and I had the 3b one only twice. When the issue first started I was able to figure out that the file responsible for the 1a error was a file named ntoskrnl.exe. After then trying out several ways of fixing the problem and checking my hardware etc. It just got worse since the bluescreen now appears more often and also the other two types as mentioned became a problem.
I apologies for this being very general and fairly unspecific since i myself do not have much knowledge of this myself and any help/advice would be very much appreciated!!!
Madeast2
PC:
4820k intel
Nvidia gtx780
Asus motherboard
Samsung SSD 120 Gb
seagate HDD 1tb
16gb ram
If any more information is need please comment on it and I will try to provide as much as can!