It'll all work just fine, although I'm a bit apprehensive if you'd try to do 2-way SLI. Maxwell on the 970 is power efficient, but the Gigabyte G1 Gaming Editions of the 970/980 consume alot more power than the average 970/980, especially against reference cards too. But if you don't plan to SLI and just stick with one card, you're gold! Nothing to worry about!
It'll all work just fine, although I'm a bit apprehensive if you'd try to do 2-way SLI. Maxwell on the 970 is power efficient, but the Gigabyte G1 Gaming Editions of the 970/980 consume alot more power than the average 970/980, especially against reference cards too. But if you don't plan to SLI and just stick with one card, you're gold! Nothing to worry about!