Yup, on its very own SSD, and my OS on another SSD, with the page file on a HDD, 16GB ram i5 @4.2, 2 GTX 970's.
@ Adixylian It's not that units are being loaded it's the sheer number of buildings that add nothing to the map, as a test to see which settings may help it I only had my own aircraft in the map, absolutely nothing else.
MSAA does help, that's gone, but the main culprit is the urban areas, out to sea or out over the desert, or near some of the small islands, it's smooth, but as soon as you start loading up all those buildings, that's when trouble starts.
Having all those houses is nice, but it's not needed and I feel it's harming performance for no good reason.
So a slider to reduce the number of less important buildings would really help, we really don't need to see 30,000 houses...