Batches are not preorders, its sensible shipping. You simply can't click your fingers and make 800 units appear out of thin air, nor can you construct or test them in one space at one time. You have to build and ship them in smaller quantities and over a sustained period of time. Its not as good as in stock hardware no and so holds a penalty, but it is NOT preordering.

**Chip Efficiency: Efficiency is a simulation result. Though BITMAIN has good track records of making power effective miner, this is only simulation. The final number depends on the testing results before shipping and it is not binding term.