Quote from: mercuryin on November 08, 2018, 05:04:35 PM

Well, I have tried with all of them and changing frequencies but nothing improve, always same problem with high temps. Answering to your question, yes, I tried flashing 650 fixed frequency firm first and from there just swapping bmminer file for your file. For example, I have tried with bmminer 880 and frecuency 650 onwards, like 656, 662, etc till 762. With all of them I get same problem. Thanks for your help !

i have 2 such s9 miners, chip temp jumps to 90-100C, but board temp stay intact, so i assume that old s9 have some difference with chip temp reading.

Quote from: thierry4wd on November 09, 2018, 09:55:11 PM

Hi all, I am currently running antminer S9 - 13.5Th with AsicBoost and voltage control, I am 15.500Th / s for 1420W on the wall (with firmware bitmain), after a lot of work, test, brick of my S9 .. ..

My setup is 725Mhz / 895mv ===> 15.5Ths / 1420W
My room is at about 20 degrees and the chips are at 90 degrees, for a fan speed of 2650trs and 3150trs

Ps : ha yes, i have unlock TEMP CHIP 1 on miner statuts, for now say the pcb temp, but i share for all, but no people interessed lol

what firmware with asic boost do you use? I tested brainsOS with AB which allows freq and volt tuning, but i cannot achieve stable hashrate more than 14 Th with enabled LPW mode.