When I play games my Monitor would lose signal to the PC and the PC keeps running in the background, no audio. I have to reset the PC to get it to connect again.
Built a new PC a year ago and fixed the no signal problem but it comes back everytime I play Modern Warfare.
PSU- EVGA 650 80 Gold Plus
GPU- Zotac 1080 AMP Edition
CPU- Ryzen 7 2700x
MOBO- B450 Tomahawk
If this is still not fixed, I removed my CPU cleaned the thermal paste off reapplied it. Then if that still does not work it might be your GPU getting too hot, Increase the fan speed if possible.
I had this problem and I fixed it by simply taking the CPU out and cleaning the thermal paste off the CPU and my heatsink and reapplying the thermal paste again, If the other suggestions don't work out I suggest trying this one.
I built my new pc a couple of days ago and it started disconnecting from my monitor when I turn it on and leave it for about 30 minutes to an hour and in games its 10-15 minutes. My GPU idle temps are 40-50C and when I'm playing games its about 70-80C I checked my PSU it seems fine and my MOBO is also fine. I am using a HDMI (with 240hz monitor) because I don't have a DP just yet its coming later tomorrow. Its been happening for about 10 Hours now I'd say.
Specs are:
Zotac 1080 AMP edition
Ryzen 2700x
B450 Tomahawk
16GB DDR4 Ram
Alienware AW2518HF
Windows 10 PRO