After days of pulling my hair out re installing kali 3 times i want to share this solution: UPDATE PLS READ FURTHER DOWN FOR EASIER TO FOLLOW INSTRUCTIONS:
1 aptitude -r install linux-headers-$(uname -r)
2 aptitude install nvidia-kernel-dkm
3 aptitude install nvidia-xconfig
4 nvidia-xconfig
reboot
Finally aptitude install nvidia-cuda-toolkit nvidia-opencl-icd
Yes this really works easy simple fast