Would a Corsair AX860i be sufficent to run a system based off a ASUS Rampage V Extreme, with Intel i7 5930K, 64GB Dominator Platinum DDR4, and 2x Asus Strix GTX980 DirectCU OC, in SLI, with 3 water cooling pumps, 2 850Pro 1tb SSDs, Corsair commander mini, and a lot of fans (~10 fans)? Or should I aim for the AX1200i/AX1500i? Since PSUs perform optimally at about ~50% load, I want to have full stress load somewhere near the 60-70% mark so the system keeps pace at around 50% load at most of time. I will propably not OC the setup, but if theres temperature marginal, Ill overclock it a tiny amount (both GPU's and CPU's if theres marginal). I guess the 980's will eat most Power of the system.