When gaming monitor drops frames then loses signal

Recently I have been experiencing an issue with my monitor while gaming. I'll be playing a game for not even 5 minutes, then my frames will drop to half of what they should be and then my monitor will lose signal. The only way for me to get signal back to my monitor is just by completely turning my PC on and off again. When my monitor loses signal, my PC is still running just fine and my sounds will still go to my headset. The monitor will just lose connection, say "no signal" and then put itself into rest mode and won't reconnect. Any advice is appreciated.