Hey tFlux411, I confirmed with AMD support that 144hz won’t work with that monitor unfortunately. I ended up buying a new Dell monitor (S2721DGF) that also supports Freesync, and it’s working great at 165hz now. 
Hey all, I’m running an AMD RX 7900 XTX, and it's working great. The only issue I'm having is that my S2716DG is only running at 120Hz, when it should be 144Hz. It was previously working at 144Hz with my Nvidia GPU. My monitor is a Dell S2716DG which is a G-Sync monitor. I understand G-Sync won't work with AMD cards, but I was thinking I could still use it at 144Hz? I've checked the display settings in Windows, and it only lets me select 120Hz. I also tried installing the S2716DG drivers, but that didn’t help either. I'm thinking of maybe buying a newer DisplayPort cable to see if that helps, but I'm doubtful. Any help would be appreciated before I spend ~$350 on a new monitor. Thanks!
S2716DG, refresh rate capped at 120Hz