I have a gtx 1660 ti gaming x (its almost 2 years old now) I get 74c in witcher 3 after a long Time playing and 2100rpm.I remember with the old system the I got 70c max and 1800 rpm. I upgraded the cpu,psu and mobo. From ryzen 2400g to ryzen 3600. Msi b350 gaming plus to msi b450 gaming pro carbon max wifi. Cm mwe 500w 80plus to Seasonic focus gx 750w gold