Computer Crashing Constantly

[PhatGingerBeast]

So I've built a computer recently. It has an AMD 6 core processor at 3.6-.8 GHz, the R9 270X Gaming edition graphics card, and (due to a bad stick I got from Newegg) only 4 GB of RAM. When I first booted it up, it crashed. Over and over. I took out one of the sticks of RAM and it booted up fine and I could download anything I wanted. But when I try to start up any game and actually play it even at the lowest of settings, my computer will crash and have a rough time starting up again. I will be getting back my full 8GB of RAM. Will that fix my problem?

 

[PhatGingerBeast]

New status update! It isn't RAM or my Motherboard! My graphics card is overheating. I don't know how to solve this.

 

[Jack114]

Case that it state that windows partition is filled up than try to reduce the usage capacity to lets say the recommended quantity that listed in the game description, and if windows hard disk isn't SSD also defragment it - if possible, the next step is to uninstall and replace the current graphic card driver .