I`ve been searching and reading a lot, but cant find anything related to Batch 7, most of posts are for batch 8.
I have S7 B7 with September`s firmware. On Bitmain website available is December`s version-does anyone have any issues with the newest firmware? Does the newest firmware make any difference?
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Batch 7 is the last antminer, which was good with your efficiency. Basically they are the same, as Batch 3 and 5 only sorted and better blades/chips and default frequency is 625.
But like overclocked to frequency 625 Batch3 miners, they are also very hot. I use my 2x S7 from Batch7 with frequency 600, and they are quiet.
You can put together 2 antminer S7 from Batch7 with one controller, software support 6 blades.
The new December software has been castrated and support only 3 blades.
The latest software, you can use with the 6 blade is from Oktober SD-S7-20151023-600M.tar.gz
S7 Firmware - 600M, 4.86th/s miner MD5: 580FF296CF87029932B5B1A53FF7844C
https://www.bitmaintech.com/support.htm?pid=00720151023101739550pOBiK5sO06A0