Crashes, BSoD's,.. While playing games! Help requested.

Hello there,

About 2 weeks ago, i've had a company building this new gaming PC for me.. But i've had quite a few issues with it thus far while playing games.
My first BSOD's i had while playing The witcher 3, it just randomly crashed with a fast loop sound.
I restarted my PC, and tried to get into the game again immediatly after (taking it as it's a new build, so i might had missed out on some windows updates etcetera) but instead, my pc crashed as soon as i got into the main menu of the game. (didn't even get to play). Besides The witcher 3, any of my other games have been working fine. Until last night, when i wanted to start up The Crew and it crashed with a BSOD pretty much immediatly.. I restarted and went out to check what was causing the issue..
i've got 4 files in my mini dump folder which are all caused by: ntoskrnl.exe (+748c0 is the adress on all 4)

Specs:
OS:Windows 7 Home premium 64 bit
CPU: Intel core i5 4690 3.5GHz
GPU: Nvidia GeForce GTX 960
RAM: Kingston 8GB DDR3 800MHz

I've attached a file made with dm log collector, for you guys to see the logs. The program zipped everything into a file, so i just uploaded the whole zip file (not sure if that's right or not)..
If anything, please just let me know if you need any more information!

Meanwhile, i figured that my issues may or may not have something to do with games running off Steam. As i just played Planetside 2 and hearthstone for quite a while, and no crashes happened. However as soon as i tried to run Rocket League nor The crew, it crashed.. may try with Gta V but i don't really want it to crash again.. So any tips yet?

Also, i did some more research today.. Apparently the 0x000000f4 error code has something to do with an issue in my RAM or HDD. This could make sense, as i did have to return it to the shop when i first got it as it didn't want to boot. One of the cables to my hdd weren't plugged in. So maybe, one of those are faulty or not plugged in correctly? I could open my case to check for myself, as little knowledge i have about it..

I've also read something about Intel rapid storage technology.. I did have that on my previous gaming rig that also used this HDD.. Would that be the problem? (i don't have it installed right now, might aswell try that)