1-don't do that it's better to buy a 2 pack ram instead of two standalone kits
2-depending on your climate, because the stock cooler can only do so much, especially with CPU intensive tasks like rendering
4-GPU overclock has nothing to do with a mobo
5-don't know really
6-onboard is better
go for another mobo, preferably a MSI or an Asus, just personal preference
Thanks, I will look into the motherboard a bit more! PSU, anyone?