Bad Performance And Random FPS Drops And Freezes in Farcry 5

Apr 9, 2018
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i have
i5 7400
gtx 1060 3gb
8gb ddr4 2133mhz

i have tried defragging and using some softwares to clear up space on my drive because when i play its running at 100% which worked for 1 run. i have tried on al settings and seems to run better on ultra than low for some reason, sometimes textures are missing on the roads and my game freezes for a few seconds randomly and drops to a really low fps when on vehicles and sometimes just running around. also it crashes a lot of times in simple cutscenes like the one for faiths mission where you are on the boat with the other police officer and also when i defeated jacob and i dont know why...

if anyone can help please answer so i can actually have an enjoyable experience.