I'm thinking of buying GTX 1070 and I wonder if my current PSU (RS-520-ASAA-A1 (520W) ) will be enough for it.
Will performance degrade or damage the card?
CPU: i7 980x (not clocked)
RAM: 16 GB DDR 3
MB: Gigabyte GA-X58A-UD7
Storage: 1 SSD 128 GB + 1 TB WD
Bonus question: Which one of all 1070 should I get?
I would STRONGLY suggest you get a decent power supply first
if you want the 1070 you are also going to need to overclock that cpu. so get a good aftermarket cpu cooler if you dont already have one