£400 pc

Hello. 

I want to build a PC with a £400 budget. It has to include a monitor (1920x1080), keyboard, headphones with mic and a wireless adapter. 

It is going to be mostly for studying and a few games. Most of the time i will be playing League of Legends but I may want to play some of the new titles coming out. 

This is what i had in mind. http://uk.pcpartpicker.com/p/26CCI

Also how different is the Athlon 750k from the FX 4300 because i could save some money there. 

From my experience the 760k is a little bit faster. http://uk.pcpartpicker.com/p/26IXh

FX-4300 is pretty much the same performance of an Athlon X4 750K.  They're just on different sockets.

I would go with Frozen Dead Yeti's build, as the 760K is a great CPU for the FM2 platform, and has a better motherboard(in general, when compared to the cheap am3+ one)