So i've completed FC5 a couple of times with all its annoying cut scenes but lovely graphics and in my view efficient engine. I thought id go back to FC4 now that i'm running a X3800 rather than my old i& 2700k at 5ghz. I also used Open World and Attachments mod. First thing i notice is how poorly optimised this game is, it runs about the same speed as FC5 but doesn't look anywhere near as good, but it also seems to have better enemy AI, not thats its good but the bad guys in FC5 are just shocking. I also noticed the game now crashed whenever any of the NV specoific setting are enable in the graphics menu, not that they make much of a difference. Finally im stunned how much of a difference having a x3800 @ 4.4ghz has made over my old i7, when using a 1080Ti at 2070mhz and at 4k. FC primal is still my favourite of the series, il hit that up once im done with FC4.