Resolution is 1024x768 instead of 1336x768

Thanks for the replies,

I've decided to just buy a new monitor
The ports of it are said by the seller DVI and Displayport.

I'm gonna be back here after getting and testing the monitor if it's solved the problem. Bye for now...

VGA, DVI-D or DVI-I are now a legacy ports, you need HDMI and DisplayPort monitor inputs.
Many people have little idea of video connectors, you want to make sure of what you are buying.

My GTX 750 Ti only have a DVI I, DVI D and Mini HDMI.
Yeah I know what I'm buying because I practically always read all of them before buying like the one from my main rig that have a HDMI, DVI D, Displayport and viola I utilize them all by using adapter except the HDMI.

Hi guys I'm back, The monitor came yesterday and didnt have the chance to use it until today because the package doesnt have a power cord which I had to find it 45 minutes away from my home. I used a DVI D and now the Resolution is Correct, Thanks Guys!