Could I upgrade to this version of the GTX 750 Ti

[jrxelite203]

PC Specs:
AMD A8-7600 Quad Core APU
8 GB RAM
Internal 300W PSU (100V-240V)
Form factor: Internal ATX
Total wattage: 300W
Nominal input voltage range: 200-240V/3A (50-60Hz)
Dimensions: 150mm x 140mm x 86mm (5.9 x 5.5 x 3.4 inches)

GTX 750 TI: http://www.amazon.co.uk/Gigabyte-NVIDIA-750Ti-PCI-E-Graphics/dp/B00IGQ4UX8

 

[Archaic59]

That model uses a 6-pin power connector. it might be better if you choose a 750 ti that does not use external power. Try this one-
http://www.amazon.co.uk/EVGA-02G-P4-3753-KR-1176MHz-1255MHz-GRAPHICS/dp/B00J6YJO2G/ref=sr_1_3?s=computers&ie=UTF8&qid=1434908569&sr=1-3&keywords=evga+3753

 

[sora]

You could upgrade to that version of the NVIDIA GTX 750 Ti if you get a new power supply.