I'm using a new R7-370 GPU with 4GB of ram for my flight simulator ( X Plane 11). It's on one monitor, not overclocked and the cooling fans do not come on-( I'm guessing it isn't running too hot to turn them on) and I have the latest drivers. How can I tell if it's time to move up to an 8GB GPU? I'm not freezing up or tearing and it's seems ok. My system is AMD8 core 3.61 Ghz (not overclocked) cpu, 16GB ram, R7-370 Asus card, samsung 860 EVO SSD Windows 7 Pro. Thanks.