I am planning on building my 1st PC soon. I have a couple of questions about it. At the start i wasn't sure if i should buy a pre-built one from Amazon but then i decided to build one for a cheaper price, the ones i saw on Amazon mostly had things like Radeon HD 8570D Integrated Graphics. It seems a lot cheaper to get integrated but is it as good as a dedicated card (I was thinking about getting a Radeon R9 270X). Also, quite a few of the ones with AMD processors had clock speeds of around 4.2GHz and 4 cores but the cpu i was thinking about getting (intel g3258) is only 3.2GHz and 2 core, will this make a big difference? Final question, will a intel g3258 bottleneck a Radeon R9 270X? I've heard about gpu bottlenecks but im not sure how much this will affect the system.
Thanks for any comments.
PcPartPicker List http://uk.pcpartpicker.com/p/BJtwK8
Thanks for any comments.

PcPartPicker List http://uk.pcpartpicker.com/p/BJtwK8