Mind Blown! Just had my performance with h264 playback doing this trick!

Seriously, I had to just do some simple edits to shorten a freaking zoom tutorial...so I got H264 to use and yeah its garbage but regardless. I disabled what is ENABLED by default and I went from extreme lag and stuttering to make it impossible to time a cut to lear real time playback. Just spread the info. Adobe I beg you NOT to touch this.

Summery:

Preferences > Media > DISABLE H264 Hardware accelerated decoding.

Premiere 2023

Ryzen 5900X

64GB DDR4

4TB NVMe only

Nvidia 3080 Ti