I had pre 11 and after rendering it never lagged during playback. On the same pc with pre 14 it now lags during playback, even after pausing it and playing again, it eventually lags. The same files from my Canon camera worked before on pre 11. My pc meet the required specs. My video card is up to date too. I tried all the troubleshoot options from here Troubleshoot digital video playback.
Any suggestions please?
It also appears that the "playback settings" in Edit>project settings>general aren't in pre 14 either. It seems as if they stopped it after pre 11.