please dont be offended why i ask this .... have you maxed out your graphics settings , it is surprising how much you can lower a games settings without actually seeing any difference.
If i have a problem i put all my settings as low a possible and increase each one a bit at a time until the so called problems appears again.
I have a gtx 1080 that cost me £800 7 years ago and on a game called satisfactory i put the anti aliasing on fxaa because my card only has 8gb video ram which brings me to my next comment... i googled your card and it only has 6gb of video ram so i think this might be the cause of your problem.
Have a look if the games your struggling with has the option to put anti aliasing on fxaa