Soo u just want to upgrade right? Not buy a new PC? What kind CPU do u have? Cause if u have a decent CPU, then an awesome GPU should be enough (provided u have at least 6-8gb of ram in ur PC and a 650 watt power supply) for you to max out all games
PC Specs: CPU: 7800X3D || GPU: Strix 4090 || RAM: 32GB DDR5 6000 || Main SSD: WD 2TB SN850