What is the recommended setup for antminer S4.
I readed on dogie review a issue with firmware and vardiff.
miners have :
Hardware Version 3.4.3.0
Kernel Version Linux 3.8.13 #12 SMP Mon Sep 29 11:13:50 CST 2014
File System Version Fri Oct 3 18:17:17 CST 2014
Cgminer Version 4.6.1
Update to newer firmware from Bitmain site should give you Cgminer 4.8 and fix some of the problems you read about.
I dont set anything on this pool diff wise, I let it rip; I have 2 S4s undercooked 1700GH each. Just depends on your electricity rate. Check the S4 Support thread Page 120 I think has the voltage vrs efficiency graph.
https://bitcointalk.org/index.php?topic=796839.0---Edit This pool will give you a custom worker diff based off its speed.
Worker Name
stan258_S4.*****
Work Diff
1.39k