25-30 FPS on low settings, Game unplayable

Hey @EA_Atic, thanks for quick reply  although i was playing it on a laptop it was not overheating. And regarding the 100% question, in my case CPU, Disk and GPU are all in high 90's and constantly running at 100%. And it is being caused by NFS heat only. Also the game hardly consumes 3gb of ram. I have already applied for refund.

@EA_AticHey, nothing is overheating. All Temps are about 60 Degrees Celsius. In my case nothing Shows 100% In the taskmanager. I have Now overclocked my Ryzen 5 2600x From 3.6 GHz to 3.9 and now NFS Runs about 40-45 FPS.. its far away From Perfect But it is at least playable for now. But its Not an Solution that will Last long for me because i dont want my CPU to be overclocked all the Time. Oh and what i dont understand?! Some Mates of mine say the Game uses 7-9 GB of RAM on their PCs... On my PC the Game only uses 3GB? I run my Ram on 2400Mhz, is that a Problem?

(Edit: I have the Game started now, on the same Config as yesterday, were i had 45 FPS. Now i have only 30-35.. How can it be?)

@EA_Atic I'm currently running with pc specs of i5 4690 with a GTX 980 with 16GB of system memory. I've tried everything, but for some reason my Need for Speed Heat launches and runs at around 10-11fps max , even the audio doesn't sync up, but somehow when I tab-out of the game , my gpu ramos up to 90% but when in-game it maxes at 16% gpu usage, it leaves the game literally unplayable , I forced everything to use gpu , but clearly , I don't understand what's going on when I tab-out and the game suddenly eats up almost 100% gpu usage like it's supposed to , but when I enter the game. It drop to nothing, at like 16% , this happens on Fullscreen, windows and borderless no matter what I do. Need for Speed Payback and literally every other game I own doesn't have that issue , this issue is only plaguing my Need for Speed Heat install, I've reinstalled atleast 5 times via steam, no result .