Any of you that may have a slightly under performing S7 Batch 8 may consider the following:
I noticed I had to go to "Miner Configuration" several times and click "save & apply" several times to get several S7's batch 8 to jump from approximately 1,700 GH/s to at least 4,600 GH/s. It would also take a while to get to 4,600 GH/s while the HWE's slowly ticked down to reach only 4,600 GH/s. I under clocked to 693 MHz on those that had high HWE's with 4,550 to 4,630 GH/s maximum hash.
When I under clocked to 693 MHz, my HWE's dropped from upper 0.0300's to 0.0060's [in most cases] and my hash rate went up from 4,550 - 4,630 range to 4,670 - 4,680 range. You might have to go to "Miner Configuration" again and click "save & apply" to get it to going above 1,700 GH/s after under clocking but in most cases you will not have to do this multiple times after under clocking. I found that rebooting multiple times did not get the tedious rigs [With high HWE's and sub par hash rate] above 1,700 GH/s and the "Miner Configuration" with "save & apply" worked much better. Especially after under clocking.
So, in summery, under clock one level down from 700 MHz to 693 MHz for better results with the batch 8's you have with higher HWE's and sub par hash rate. This will make your hash rate better, your HWE's lower and your rig run a little cooler.
David
+1
not only that & to those who can adjust their voltage, might be worth to give it a try to up the voltages in very small steps.
just back to basic oc'ing techniques.
more processing power = more power needed (volt) but also = more heat = more errors = shorter lifespan
so it is up to individual to decide how much to add.
of course the lower the hw error, the higher the hashrate, the least heat is always the best result.
take it 1 step at a time BUT remember warranty is gone !
if no options (adjusting voltage) then lowering will definitely help.
i'd rather have a stable miner with slightly lower hashrate but with minimal HW error & less heat.
