Mixed up things, now stuttering...

[TonyD]

The previous beta patch introduced a new graphics engine (code) that was intended to massively improve performance, but introduced a lot of new issues as well the absence of some graphic effects that were DirectX 9 based. The latest beta patch improved some things further, but again introduced some new issues that weren’t apparent in the previous version. A bit difficult to give some relevant advice here, but I would say from what you have posted that your performance is currently very good, and you most likely will not experience a significant improvement with these patches (someone with specs similar to yours could offer a better opinion, maybe).

If you do try them you can always revert to your current (official) version by verifying the game files in Steam. It is advisable to delete the game cache files when updating (and reverting) like this to avoid possible graphic anomilies (..\Documents\1C SoftClub\il-s sturmovik cliffs of dover\cache). The game will rebuild these when run again.