rtx3080

I'm presently running a 12700k/3080/32gb 3370 ddr4 ram/2tb NVMe ssd to an ultrawide monitor (3440x1440) My issue is the temps while watching YT videos. When in 1440p or 4k, there is no or almost no temp change (Idle-30c; 1440p/4k-33c) but @1080p the 3080 ramps up to 70c! Is this a common...