GALAX GeForce® RTX 2080Ti White (1-Click OC) driver 450

GALAX GeForce® RTX 2080Ti White (1-Click OC) was used. I installed 450 and 440 and 410 and 384 and still nvidia-smi would not work and after reboot the system would not get completely booted it will be in a black screen and at the top left a “-” will be blinking.

Kindly help
Specs of PC
Processor intel I9
Cores processor 20
Graphics Card GALAX GeForce® RTX 2080Ti White (1-Click OC)
OS: Ubuntu 16.04