1080ti often consumes 75W when idle ?

Hi, my OS is ubuntu is 18.04. Here is my screenshot of nvidia-smi. I tried both 16.04 and 18.04. clean and fresh install. But the problem still occurs. Just browsing webs and gpu often turned red and consumed 75W~78W.

Can someone help me?
https://i.imgur.com/BqniWG0.png

You might want to subscribe to this topic: https://devtalk.nvidia.com/default/topic/1002912/linux/very-slow-ramp-down-from-high-to-low-clock-speeds-leading-to-a-significantly-increased-power-consumption/

Also, how difficult was it to spot it?

I’m using a bare machine. so it’s easy to see my gpu turned red when it’s using 75W+. About 5~10 mins a circulation and keep high consumption about 1~2mins.