Thanks, but I did type that in haste and realised after I went to bed I hadn't actually got as far as to answer the question
So to finish the post...
A 3060ti (or better if you are comfortable spending the money) would give you more frames and an ability to turn up settings, including playing with ray tracing settings. One big bonus is that if I remember the 980ti doesn't do variable refresh rates, but your Acer Predator monitor will be either Gsync or Freesync depending on which model, but both are supported by Nvidia's 3000 series cards. If your monitor is a Freesync model, then you do have the option of getting one of the new AMD cards if you can find any stock. There will always be games where Ultra is just too much for any current hardware, and variable refresh rate makes those smoother (though your high fixed refresh rate will already be helping).
OFC we are trying to save you money here with our 3060ti suggestions. If that is a £2000 200Hz monitor you are playing on, then you probably want a 3080 which is between £700 and £800 if you can find stock at non scalper prices. Curry's had some on Saturday, stock seems to be steadily turning up so I wouldn't pay ebay prices to get a card with dubious warranty.
Using this chart as a rough guide:
https://www.techpowerup.com/gpu-spec...x-980-ti.c2724
the 3060ti is nearly twice the performance of the 980ti, the 3080 they rate at 278% so close to three times your current speed.