Fps drops at any action

I’m using a Lenovo Yoga 720 15" laptop (i7-7700, gtx 1050) to power an acer predator z35p monitor (100hz, ultrawide 3440x1440). In bot tests and the beginning of games I get 100fps consistently, but as soon as I even see the enemy, it dropps to a cap of around 50, sometimes droping to 30. Laptop and monitor are connected with displayport. and ideas on what to do?

These standard tips can help resolve most Overwatch FPS drops:

Also here are advanced tips I have written that maximize your FPS performance in the game: