I can load and get into Altis (and framerate is pretty good too), but I do get frequent and random freezes only experienced on Altis.

The freeze is in the form of a sudden black screen with no sound, where I then need to alt-tab out of and force ArmA 3 to close via the Task manager. I've played on Altis for various amounts of time, ranging from under 5 minutes to almost an hour.
I'm unaware of any reoccurring factors that could be causing it, though aerial flight seems fine - freezes occur more frequently on the ground.

I'm running no mods, removed all launch parameters, GPU temperature is good, on the latest Dev build (Hence : Altis).