The latest version of DarthMod Empire (DME) actually includes a toggle for this. Many users miss it.
Empire was built for single-core CPUs. DarthMod forces it to use all cores, which ironically causes timing errors. empire total war darthmod ottoman turn lag fix top
Place a single sloop or galley in the sea zone directly between Constantinople and Anatolia. The latest version of DarthMod Empire (DME) actually
Move a naval fleet into the Bosporus strait (the water separating Europe and Asia at Istanbul). empire total war darthmod ottoman turn lag fix top
This is not a bug with your PC. It is a pathfinding and scripting choke point. Here is the complete technical breakdown and the permanent fix.