There are a few good tips to try. First, try this article:
Next, please check your NVidia control panel for the following settings:
First, you need to set your Power Management settings to the high performance setting. If you don’t have a performance/quality setting already, you can use the left hand side of the power plan window to create one.
Now that this is done:
- Right click your desktop and go to Nvidia Control Panel
- Select Manage 3d Settings from the left menu
- Click the Program Settings tab
- Select the Overwatch Application in the list. If it isn’t there, Add it using the option next to the drop down
- In the options below, find CUDA - GPUs
- Set this to your Nvidia card, then click Apply
- Select Configure Surround, PhysX from the left menu
- Toggle the PhysX settings dropdown to use your Nvidia card.
Finally, reset the game settings to force it to pick up the changes.
I also have additional tips in my guide here: