Massive frame drops in Gears 4

I’m running Gears 4 on my custom built PC, and it started dropping frames and lagging, after about an hour of gameplay. Here are my specs:

Windows 10 Home 64 bit
32 GB of DDR4 2044 Mhz RAM
Core i5-7600K 3.8Ghz, 4.2Ghz OC CPU
RTX 2060 Super 8 GB GPU
1 TB SSD game storage

I don’t get why its suddenly dropping frames, lagging, and stuttering. I tried lowering the settings, turning on adaptive resolution to the max, turning on v-sync and 60 FPS limit, lowering the resolution, etc.

It makes no sense at all.

Does anyone have a solution?

download an older driver from Nvida 445.75. also make sure you use driver display uninstaller while in safe mode