nvidia - LTS 14.04 - Geforce GTX 970M still doesn't work after several installs/tutorials

I'm new to Linux, currently using 14.04 lts. My laptop is a Clevo P150SMA (Sager P150SMA) with a Geforce GTX 970m, uses nvidia driver-352.55
I have tried every single installation that i saw here on this forum, also followed http://www.binarytides.com/install-nvidia-drivers-ubuntu-14-04/,
And after all this and $ glxinfo | grep OpenGL | grep renderer
I still get:

OpenGL renderer string: Mesa DRI Intel(R) Haswell Mobile

So i tried all this:

1. sudo apt-get remove --purge nvidia-*




2. Installing from the driver that you get from Nvidia page: NVIDIA-Linux-x86_64-352.55, didn't work.




3. Software & Updates / Additional drivers / Tried to change it between 346, 352, 355 and X.org X server - Nouveau, didn't work.




4. Installing Nvidia current driver from Ubuntu Software center, didn't work.




5. Installing bumblebee, didn't work.




6. Loads of tutorials here on the forum and youtube, didn't work.

All installations occurred normally and were done one at a time, not everything jammed in at once.

What i get from, $ lspci -vnn | grep -i VGA -A 12

00:02.0 VGA compatible controller [0300]: Intel Corporation 4th Gen Core Processor Integrated Graphics Controller [8086:0416] (rev 06) (prog-if 00 [VGA controller])
    Subsystem: CLEVO/KAPOK Computer Device [1558:5281]
    Flags: bus master, fast devsel, latency 0, IRQ 34
    Memory at f7400000 (64-bit, non-prefetchable) [size=4M]

    Memory at d0000000 (64-bit, prefetchable) [size=256M]
    I/O ports at f000 [size=64]
    Expansion ROM at  [disabled]
    Capabilities: 
    Kernel driver in use: i915

00:03.0 Audio device [0403]: Intel Corporation Xeon E3-1200 v3/4th Gen Core Processor HD Audio Controller [8086:0c0c] (rev 06)
    Subsystem: CLEVO/KAPOK Computer Device [1558:5281]
    Flags: bus master, fast devsel, latency 0, IRQ 37
--

01:00.0 VGA compatible controller [0300]: NVIDIA Corporation Device [10de:13d8] (rev a1) (prog-if 00 [VGA controller])
    Subsystem: CLEVO/KAPOK Computer Device [1558:5281]
    Flags: bus master, fast devsel, latency 0, IRQ 33
    Memory at f6000000 (32-bit, non-prefetchable) [size=16M]
    Memory at e0000000 (64-bit, prefetchable) [size=256M]
    Memory at f0000000 (64-bit, prefetchable) [size=32M]
    I/O ports at e000 [size=128]
    Expansion ROM at f7000000 [disabled] [size=512K]
    Capabilities: 
    Kernel driver in use: nouveau

Install the latest stable NVIDIA drivers supporting GTX970 from the Proprietary GPU drivers PPA.

Before you install new drivers uninstall every NVIDIA related software you have installed before.

Open a terminal and execute :

sudo apt-get purge nvidia* bumblebee  
sudo reboot

Install the latest current stable NVIDIA drivers from NVIDIA short-lived branch by executing :

sudo add-apt-repository ppa:graphics-drivers/ppa
sudo apt-get update
sudo apt-get install nvidia-355 nvidia-prime
sudo reboot  

To switch between intel and nvidia graphics - open NVIDIA X Server Settings -> Prime Profiles.

Note : In case you have to adjust which card to use in BIOS select the switchable graphics mode.