I'm not forcing it to run at 144fps, that's my normal setting.I'm doing this because is very hot outside and pc can get the room temp very hot, anyways..why would you need 144 fps in this game, it's not a shooter. 60 would me more than enough
Also, as I said, your card running at 65-70 degrees is normal, you don't have to force it to run at 30fps to bring it below 50 degrees, even if the outside temp is high. RTX cards are pretty resilient, they won't break that easily and as I said, if it does get too hot the cards will protect itself.