I was asked by Sean Drohan to post here after I wrote a bad review about this game, so I am.
Here is the current situation:
On a normal 6 player map, saving a game takes over 10 minutes and uses up all 16GB of memory (@2400MHz) from my PC. During normal game play, GC3 take about 5-8GB of ram, but doubles when saving and even sometimes pages out to disk. If I try to load a game, same issue, all memory gets used and the game eventually crashes. And yes, I did submit the crash reports multiple times.
I did check to make sure paging was set to automatic, disable windows defender on GC3 game files in both locations and disable Steam Cloud saving. I even updated Windows10 and the nVidia drivers. Doesn't help. Same problem happened over and over.
Also, when verifying game file integrity after I play GC3 (after a crash or quitting the game), Steam always says that 6 files are corrupted.
If you want my games files, let me know where I can uploaded them to.