I upgraded my OC'd GTX 970 to a 980 Ti (no overclock, but much better memory) and noticed a distinct change in temps. Where my 970 sat at 38 (max) centigrade on idle, my 980 stays around 55, sometimes up to 67 on idle. What gives??? How can I keep this cool? I'm afraid to play GPU intensive games on it because it runs so hot already. Is this normal?