Look man I'm not trying to defend Howard here or imply you're tech illiterate, or that all your issues clear up 100%, but have you by chance updated your driver's? Mine were out of date enough starfield threw up a warning which I ignored and was not having a good experience with the same as you(iunno your ram or storage config but I was running on an average NVME and 32 gigs ram with 5600x and 6700xt). But after I updated a lot of the issues smoothed out, not all, but most. At 60 fps average with a mix of med high at 1080p though. Maybe worth a try?