1000w PSU is pretty borderline for mining with 6 card rig, to be honest (Always give yourself headroom with PSU.
Pretty borderline for lamers. For Ethereum mining, it has enough overhead. It has reserve even for core-intensive algorithms.
I have a rig consisting of 4x GTX1060 and 1x GTX1050Ti (60% of GTX1060 in both power and performance) overclocked and power-limited, it delivers 110 MH/s draining 510W from the socket. Factoring the PSU efficiency, I estimate the power consumption at 470W for 4.6x 1060.