I had used a multiplayer mission Syria map, I downloaded from the user files and it had every airplane available to fly that DCS has in their library. That choked my system big time, whereas is used most of my Vram (8gb) AND almost all of my 32 gb of regular ram.
I have an alienware R4 Aurora syatem with a 1070 gtx card, so I realize it isn't brand new. But, it seems if the missions are stuffed full of possible content, it sucks the life out of the computer.
Bruce