Game turning monitor off and then freezes

I'll post my DxDiag at the end. 

Okay so, for awhile, I believe it's been since I installed Get Together, my game has been crashing. But, it doesn't just go to the desktop, it will turn off my monitor (The screen will go black and then say something along the lines of "not connect" or "no source" etc). If I have the sound on, I can hear the game music skip almost, indicating that it is frozen. I am then forced to hold down my computer's power button and force it to turn off. It will also occasionally just freeze, making the similar skipping noise, and then power off my computer. 

I have tried taking out CC and mods, clearing RAM, repairing the game, turning the 32 bit on, changing monitors, putting a fan on the computer in case of overheating (which isn't the problem. The temp stays normal) changing graphic settings, changing origin settings, etc. 

I have a feeling you guys are going to tell me that it's my graphics or something, but I don't know much about computers, so I thought I would post it anyways. 

Let me know if I didn't post my DxDiag correctly because, I am a serious computer rookie, hahaha. Thanks in advance.