CydiaDash

You don't really need after-market thermal paste, the stuff that comes with your cooler should be fine. If anything it would be a 1-2 degree difference. You might want to get some 120mm fans as well such as noctua nf-f12, be quiet silent wings 2 or corsair sp120s. Also, the ASUS 970 strix has a silent fan mode and the fans will only turn on at certain temperatures

That sounds like coil whine to me... Go to http://www.coolermaster.outervision.com/ to check about how much power your system will need. Remember that it is nt 100% accurate so you will need to get a bigger wattage PSU then it recommends :)