It's impossible to answer your question. Some games are poorly optimized and some are optimized well. Some are more CPU dependent versus GPU. For starters could you list three or four games that you plan on playing? Also, what are your full specs, including your power supply's manufacturer and model number? What is the manufacturer and model of your display? I'm curious if you have adaptive sync. Personally I used to game on a 1440p 165 Hz with a single GTX 980 Ti, and I was very happy.