Seems like your CPU is bottlenecking your RTX 2080ti, you should consider to OC or upgrade CPU/MB/RAM maybe. On my Alienware Area-51m desktopreplacement I run an i7 9700K @ 5.00 GHz and a (Laptop) GTX 2070 which I ocd a bit. I get smooth 60-90 FPS depending on the situation.