That's one hell of a present! You must have been extra good this year
🙂First you can try swapping the two cards around, the card in the top slot will always be hotter but perhaps the other card runs slightly cooler.
When you have two cards as powerful as those, they tend to get quite hot and some chassis are more suitable than others. A lack of space in between them can cause the top card to reach around 80 degrees, that is normal when in SLI. Again it depends on the airflow of the chassis. Your case can cater for quite a few fans, have you installed extra ones?
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FPS, Racing, and VR Gamer / Tech Enthusiast / ROG Admin