Why not just have made it a 4TH machine from the start and not have it so highly strung. Users can OC just like before.
I doubt that very seriously. It's possible [after assembly] they keep rigs that meet certain parameters. If I owned BITMAIN, I would keep rigs that met certain parameters as well. Wouldn't you? Does this mean all the rest are trash? No...
I prefer the batches with more strings that results in better power efficiency rather than the 4.0 TH rig with fewer strings and less power efficiency. I know it says batch 6 is the same .25 watts per GH/s. However, I have to see it to believe it.
Just wait until the after-market on these. You can't just say "S7 for sale". You'll need to indicate batch, GH, chips, board version, power consumption, and whatever other specs all these different ones have. A warranty and fix nightmare too when communicating with Bitmain.