I currently have an AMD RX 460 4gb graphics card, which performs decently well with what I need it for, but I was wondering if I could get better performance out of 2 GTX 750 ti's. I mainly play Overwatch and would like to run at 1080p 144fps. I have a 144hz monitor that has NVidia 3D and Lightboost capabilities which I cannot take advantage of as I have an AMD GPU. I don't know anything about NVidia cards or what Lightboost does, and wanted know if it would be worth switching out for 2 750 ti's.