Gracias lo estoy instalando , ahora comento que tal fue, gracias 
Descargue y meti en la carpeta raiz el archivo
"wget
http://es.download.nvidia.com/XFree86/Linux-x86/340.24/NVIDIA-Linux-x86-340.24.run"
y al instalarlo me da estos errores:
ERROR: Failed to run `/usr/sbin/dkms build -m nvidia -v 340.24 -k 4.4.19-smp-wifislax`:
Kernel preparation unnecessary for this kernel. Skipping...
Building module:
cleaning build area....
make KERNELRELEASE=4.4.19-smp-wifislax module KERNEL_UNAME=4.4.19-smp-wifislax; make
-C uvm module KERNEL_UNAME=4.4.19-smp-wifislax
KBUILD_EXTMOD=/var/lib/dkms/nvidia/340.24/build/uvm.........(bad exit status: 2)
Error! Bad return status for module build on kernel: 4.4.19-smp-wifislax (i686)
Consult /var/lib/dkms/nvidia/340.24/build/make.log for more information.
ERROR: Failed to install the kernel module through DKMS. No kernel module was installed;
please try installing again without DKMS, or check the DKMS logs for more
information.
ERROR: Installation has failed. Please see the file '/var/log/nvidia-installer.log' for
details. You may find suggestions on fixing installation problems in the README
available on the Linux driver download page at
www.nvidia.com.