I'm having an issue with Rainbow Six: Siege. Half of the time I have 100-130FPS and the other half it declines down to 30-50FPS making it almost unplayable. I've contacted Ubisoft support and tried everything imaginable to get this fixed including formatting my PC, uninstalling and reinstalling, verifying game cache, running as administrator, running with no overlays, updating video drivers and even running with that CPUCores software on steam but nothing seems to help it. any assistance on this issue would be greatly appreciated and I'll see if I can include a screenshot of my benchmark to show that my usual FPS should be above 80 constantly.
I have the same problem. It started after i changed my motherboard. I used to have constant 60 fps but know it suddenly goes down to 40 fps. It is umplayable this way. It happens with other games as well. Like gtaV or something. What is your motherboard? Mine is m5a78l-m PLUS usb3