HD 4300 ~ 4500 series are too week to run games. Furthermore they are way obsolete.
If you want to game you need a better GPU. You can get a GT630. This card can play almost any game on 1080p on medium graphics. Since your resolution is less than 1920x1080 , you can play any game on high settings.
But bare in mind that it is recommended for you to use a quality power supply and not the power supply that comes with your case. Because those are rated at 400W but only give a maximum of 250W. You need good clean power in order to make your PC last and run properly. When you're using a power supply that has less than the needed watts , your PC will slow itself down to save power and use less watts. However if you get a good PSU that has sufficient wattage and amperage then your PC will run on it's full potential.
I'd recommend you get the
Gigabyte GE-N400A-C2 PoweRock 400W PSU from PC and Parts.com for 35$ + VAT + Shipping (About 42$) as for the graphics card talk to
ROG Store so he ships it for you.