I suggest staying away from Grid Autosport, it's broken for many (crapshoot). If I could gift my key I would because I have never been able to actually play it properly.
I have attempted to play it on various hardware (Intel, AMD cpu/gpu, Nvidia) with various drivers and it always stutters no matter what I do (there is a good bit of discussion about it out there).
I just tried to play it again the other day on a 980ti and the stutter remains (no game settings seem to have any impact, even tried it on low settings at 720p).
Tried it with a gtx 780 oc, R9 390x, gtx 980ti oc, gtx 750ti, R9 270x, gtx 650, Radeon 7850... no dice.
I had no issues running Grid or Grid 2.
I am about to grab "Rise of the Tomb Raider" even though I have it on Xone (about 1/2 way through it).
I am very curious about the DX12 addition but not sure if it's just a gimmick at this point (them adding it to this DX11 based game).
Some make claims that it works and runs better while others say it just causes issues and crashes.
--- Update: It actually runs worse on DX12 vs DX11.
no worries, I'm just about 47, often game while my wife and son are in bed and will be gaming until I no longer can.