2. If you place your selected parts into PCPartpicker.com you will get some pricing, compatibility, and total power req'd data
3. For build itself watch youtube "newegg computer build parts 2 & 3"
4. Comments on your build: I'd change CPU to I3 ivy bridge, Mem 8 GB 1600 mhz. Finally, no point in a Z77 motherboard (made to overclock) with a non overclocking CPU. Can save some money here to put toward CPU. Like your PSU.