"You mean, reduce the DSR factor to a lower number? I'm using 2x, which renders twice as many pixels and then down-scales it to fit the screen. It's rendering at less than 4K resolution, which is no problem. I'm using a GTX 1080 Ti with 11GB of VRAM."
Yes. I got mine at 1.20 even got a bit of a step up for frame rate.
Try 1.50