I have the same issue, the screen suddenly goes black for some seconds, then the landscape slowly rebuilds. Buildings also flash black once I get close to them after this freeze.
System is windows 7 64Bit, a completely fresh install. The only thing installed on this system is DCS, so there is nothing that could hog ressources.
I did not have this issue with the same PC, same OS and a lot more software clutter when I last played about 12 months ago (had to take a pause from DCS due to work).
System: 8GB Ram, i5 2500k, Geforce GTX560Ti, Asus P8Z68-V LX Mainboard, Installed on a Samsung SSD.