Hello Guys, I have finally found a tool that works with Prepar3D to minimize the ooms. This tool is called texture optimiser, for the very first time last night i was able to test it and i was shocked. I was able to do a full flight from Boston Logan, to Flytampa Cyyz with everything ticked & no OOM! not to mention this was also in the pmdg 777-300. If you use this tool, i promise there is no visual quality lost. It's also improved the frames somehow.
Wayne George