What threatens the unbalance of one of the video card coolers?

Question

Video cards

Good evening everyone. There is an ASUS GTX 970 Strix graphics card. I have been using it for 5 months already, a week ago I noticed that one of the coolers was out of balance. Signs - the cooler does not rotate smoothly and makes a "clicking" sound. At the same time, its speed did not seem to decrease and it stops at the same time as the second, serviceable cooler. Actually, the question is, what will happen if you continue to use the cooler in this state? How dangerous is it?
To explain the essence of the problem in more detail, I am attaching a video found on the Internet with the exact same problem.
https://www.youtube.com/watch?v=ELYz-H-PXzo