What models ( reference or factory ) and manufacturers? And what price?
Well, yesterday i finished the setup of my rigs; now they are hashing at the correct speed. I changed the psu's and now all the rigs are running at logical rate (before i did not understant why sometimes my rig were offline; now i know that a rig with 6x290 gpu's will drain 180w/gpu PLUS +- 65w at the motherboard side, so a 6 gpu rig with 6x290 will drain 1500w. Now they are powered by 2x1100w GPU (motherboard+2 gpus one and 4 gpus the other one), so all goes fine. Now i only can improve the fan system.
My farm have 4x470, 9x290, 3x380, 11x7950(or 280/x) and 1x7870. I want sell the 7950/7870 only to upgrade the rigs to rx 470/480. Also i want to improve a closed box with fans to improve the fan system and send them to a cheaper electricity site (like labrator or oregon).