Ubuntu – Missing ubuntu drivers for GT 730 in Ubuntu 14.04

I have clean Ubuntu 14.04 and using MSI Nvidia GT730 video card.
By default Ubuntu installed nouveau driver and it is in use right now.
I want to install nvidia proprietary driver, but I do not see them in standard locations:

1. In ubuntu gui tool in system preferences (Software Updates->Additional drivers) drivers are not avaible
2. "sudo ubuntu-drivers devices" and "sudo ubuntu-drivers list" returns empty string
3. sudo lshw -c video:

*-display
описание: VGA compatible controller
продукт: NVIDIA Corporation
производитель: NVIDIA Corporation
физический ID: 0
сведения о шине: pci@0000:01:00.0
версия: a1
разрядность: 64 bits
частота: 33MHz
возможности: pm msi pciexpress vga_controller bus_master cap_list rom
кофигурация: driver=nouveau latency=0
ресурсы: IRQ:45 память:fd000000-fdffffff память:e0000000-efffffff
память:de000000-
dfffffff ioport:dc00(размер=128) память:fea00000-fea7ffff

4. lspci:

   01:00.0 VGA compatible controller: NVIDIA Corporation Device 0fc8 (rev a1)

Is it safe to install latest driver downloaded directly from NVidia site?
Any guesses why drivers are not avaible?