Why won't nvidia proprietary driver turn on?

Question

linux

I did everything exactly according to the instructions https://wiki.debian.org/ru/NvidiaGraphicsDrivers
After restarting, I do
$ nvidia-detect
it But it still says that the card works on standard drivers (Your card is supported by the default drivers.)

Detected NVIDIA GPUs:
01:00.0 VGA compatible controller [0300]: NVIDIA Corporation GK104 [GeForce GTX 770] [10de:1184] (rev a1)

Checking card:  NVIDIA Corporation GK104 [GeForce GTX 770] (rev a1)
Your card is supported by the default drivers.
It is recommended to install the
    nvidia-driver
package.