(Solved) coolbits without xorg.conf?

cat /etc/X11/xorg.conf.d/nvidia.conf
#
Section "Device"
        Identifier      "Videocard0"
        BusID           "PCI:1:0:0"
        Driver          "nvidia"
        VendorName      "NVIDIA"
        BoardName       "NVIDIA Corporation GK106 [GeForce GTX 660] (rev a1)"
        Option          "Coolbits" "12"
        Option          "RegistryDwords" "RMUseSwI2c=0x01; RMI2cSpeed=100"
EndSection

# This is a trailing line, it is needed so that End Section is not the last line

You may want to remove/change BusID. You’ll definitely won’t need RegistryDwords (it’s a hack for a bug regarding I2C).