When travelling at high speed (usually between West Point and Muldrough) the map tiles will sometimes draw VERY slowly, usually meaning I have to slow the car to a near halt for it to catch up. There is also an issue with low frame rates, dropping from 50+ to about 20 whilst fully zoomed out.
Having played around hosting a multiplayer game with 3GB memory and 3 players there were issues with loot not spawning or only spawning in a few container types. Another issue in MP was the map tiles halting the loading process for myself (no others were effected). In this instance, the tiles simply stopped loading, no amount of waiting remedied this, and i could still drive/walk through these areas but only saw blackness.
None of these issues occurred whilst my system was under stress, CPU usage spiked to mid 80% when hosting a MP server but never above. RAM seemed to remain fine throughout.
System:
Windows 10 64-bit
AMD FX-8350
XFX R9 280x
8GB Kingston HyperX RAM
120GB Corsair SSD (install files located here)