When I got my series X I also upgraded to a 4k 60fps tv. When I started playing D2 on 12/8 with the updates to fps I noticed it right away. Smooth like butter. However, for a time, I had to use an older monitor that only ran at 1080p 30fps. Now that I've moved back to the tv it doesn't seem like the same smooth, silky fps I experienced before. Does anyone know if I can determine how many fps I'm getting out of my xbox, or ideas I can use to troubleshoot this? I've tried and checked: Different HDMI ports Uninstalling and reinstalling D2 Verified I'm using the HDMI cord that came with my series x All with no luck or change. Help?