Hi. I noticed that my RTX 3080's drop there core clock. Any idea why this is?

GeForce RTX 3080, 885 MHz, 9501 MHz, 46, 205.02 W
GeForce RTX 3080, 885 MHz, 9501 MHz, 49, 208.43 W
GeForce RTX 3080, 855 MHz, 9501 MHz, 41, 196.36 W
GeForce RTX 3080, 870 MHz, 9501 MHz, 41, 195.91 W

I have changed the powerlimit to 340 and got no oc set.

THis is on ubunut 16.04 NVIDIA-SMI 455.23.04