Just to recap, what drivers are you using?
Your Geforce card is built on Nvidia technology. They have unified drivers, meaning the drivers they host on their site will work for any Nvidia cards irrespective of who makes them. Your card is very close to a reference board anyway, therefore i would recommend by uninstalling your drivers and re-installing the latest Nvidia drivers first of all.
You will find them here click here
this is version 66.93 and you want to download from the primary site, with the file size at 17.8mb. Install these making sure your old drivers for the MX carda re uninstalled first of all.
The reason your streaming is jerky, (in my opinion) is because the stream is being buffered all the time over your internet connection. basically, the faster your internet connection the faster the video can be streamed and therefore playback will be smoother. I do not attribute this to your card, but maybe someone else can shed more light on this.
Start with getting those latest drivers, and we'll move on as others add help.