So please to be more clear if i buy avalon 6 what other should i buy to complete can you send me a links to buy all detalis what need for avalon 6 and start working cuz i see to many reply but honestly im new on this and i have a little bit problem with english to be more clear just send me links to buy all products which need for avalon 6 / 3 tera and thank you for you reply
you said one tera in the original post, then you can simply grab one s5 wich will cost you nothing(1 btc) roi should be 5 months, you just need one cpu psu to use it a corsair RM 750 will suffice
OP still has not said electricity price. So it's kinda hard to recommend him gear yet.
Until you know that we cannot really say what efficiency he needs. We can guess and speculate. But we need more info.