PC randomly stops sending signal to monitor

I built a pc a few weeks ago and it worked fine until 4 days ago. When playing some games like CSGO for example I will randomly get a black screen and my monitor will say no dvi signal. This is happening inconsistently as sometimes I play other games like the Division beta and experience no problem. I also checked and my graphics card drivers are up to date.

My specs are gigabyte GA-H81M-S2H GSM (rev. 1.0) LGA 1150 Intel H81 HDMI SATA 6Gb/s USB 3.0 Micro ATX Intel Motherboard

Intel i5-4690k

Saphire Radeon r7 370 4gb

Asus VG248QE 24" monitor with the display settings at 1920x1080 at 144hz.

Does anyone know what the problem might be?(first time posting sorry if the formatting is off)