GPU doesn't consist of Power Supply n card(in ur case 5670).HD5670 is d GPU itself.It is made up of millions of transistors n other stuffs.
Power Supply,as d name suggests,powers ur rig.
Don't confuse him further by going technical (transistors etc).
@Rokcy, Just go and get the config given by Jaskanwar and worry about the GPU/CPU later. Ask the dealer to assemble it for you. And all that goes into that cabinet will be part of CPU and a GPU is this:
*benchmarkreviews.com/images/reviews/video_cards/HD-575X-ZNF7/XFX_Radeon_HD5750_Front_01.jpg
It sits inside the cabinet (*www.pcdistrict.com/modules/product...7-cpu-solutions-3-2ghz-custom-pc-4187.jpg)and is part of CPU.
Once you get the system, open a thread asking whatever you want to know.