Look at the Hardware and Software section, lots of information there.
Shortly, an Intel CPU >3.5 GHz, 8 GB of RAM and that 970 is what you're after. The choice of motherboard depends on whether you're planning to overclock or not. For the hard disk, don't take anything "green" because they are meant for low power slow motion storage purposes. An SSD will make the computer start Windows and programs faster, but it won't boost your frame rates at all. A sturdy well breathing case and high quality (not necessarily high priced!) air CPU and GPU coolers. And - this is essential - a very reliable power supply.