I found a somewhat low profile GTX 750ti that does not require 6 pin connector . So it may work on your PC
https://www.amazon.com/EVGA-GeForce-750Ti-Graphics-02G-P4-3753-KR/dp/B00IDG3IDO/ref=sr_1_1?ie=UTF8&qid=1475637287&sr=8-1&keywords=gtx+750
OEM PC usually comes with bad PSU (somewhere between 150-350W). I think you should open the side panel of your PC then tell us what is your PSU total wattage
If it's way below 200W then GTX 750 ti will fry your PSU
https://www.amazon.com/EVGA-GeForce-750Ti-Graphics-02G-P4-3753-KR/dp/B00IDG3IDO/ref=sr_1_1?ie=UTF8&qid=1475637287&sr=8-1&keywords=gtx+750
OEM PC usually comes with bad PSU (somewhere between 150-350W). I think you should open the side panel of your PC then tell us what is your PSU total wattage
If it's way below 200W then GTX 750 ti will fry your PSU
Laptop: (Show Spoiler)
Mini PC :: (Show Spoiler)