The EVGA GeForce GTX 750 Ti FTW supports outputs: HDMI, DisplayPort, and DVI. (If you buy it brand new, it comes with a VGA to DVI adapter too.)
And your HP monitor supports DVI and VGA.
So the easiest cable to use here would be a DVI-I cable.
http://www.newegg.com/DVI-Cables/SubCategory/ID-2814
You could use that adapter that comes with the graphics card, and use a VGA cable, but the best visual output will come from DVI on your specific monitor.