Hey Blissz, got a couple of questions/suggestions:

- Why did you slow the auto-speed fan so much ? Any reason ? Could you raised it again as it was after your first mod ? Or I won't be able to use auto-fan anymore !   My chip temps never got that high before your last mod.  Or maybe you can make some auto-speed fan profile like "silent" and "normal" ? Auto-speed was perfect because it allows the fan to run faster during daytime, and slower at night when the temp drops a little. But running too slow and it become useless, at least where I live with high temp daytime.

- Could you switch to your devfee pool at the end of the 2h period instead of before ? When we reboot to try different setting, you get much more than 1,5%. Not that I complain about your fee, but let's say you reboot 5 times an hour, you get like 7,5% instead of 1,5% for this hour. And I don't think anyone would bother rebooting every 1h55 to avoid it !

Thanks in advance.

I second that with regards to the reduce auto fan speed. I have tested it on a batch 1 17Gh D3 and I have rolled back to stock for the time being.

Problem I have:

1) Following your instruction and setting speed at 400 and fan at 25% is risky. The moment I upgraded the firmware my temp went up to 80. I will suggest setting the fan to at least 59% (if ambient temp is around 20 degrees) or higher if your ambient temp is much higher.

2) I tested with lowest, 1,2 voltage at 487 and I am not getting and HW errors but it keeps stopping with no hashrate.

3) You dev fee pool keeps kicking in when I'm trying to test with different settings and it is better if you set it so that it kicks in at the end of the hour or so.

4) Maybe a way to manually tweak the auto fan speed will be useful.

5) A temp protection like the L3 can also help.

I have got another problem after tested your firmware from page 1.

After rollback to the official firmware, my temp is really abnormal. It is much higher than usually.

I have 2 D3 in the same location and they normal run around the same 70 / sub 70, but the temp has suddenly shoot right up even after rolling back to the official firmware which is quite worrying.

D3 which tested with your firmware and rolled back to stock is running at 487(default) Board temp 59/59/61 and Chip temp 76/76/78 fan at 4560rpm

D3 right next to it with stock and not tested with your firmware is running at 487 (default) board temp 51/52/56 and Chip temp 66/67/71 fan at 4140 rpm.

My D3 have never had board temp over 57 and they are normally at around 56 max but after flashing your firmware I can't seems to get the temps down.

Please advise!

I rolled back because my D3 keeps going offline and I didn't like the auto fan speed had been adjusted to such low rpm.

I even tried to flash the Bitmain Nov firmware twice and temp still remain so high.

I believe the fan settings need tweaked.  Seems that they default to ~50% if the manual setting box is unchecked and never move from there regardless of chip temp.  Problem with setting them higher is it seems to cause instability with the rig I'm testing on.

Like what you're doing here, but this feature definitely needs addressed IMO.

Hi blissz, thanks for your work!
I use your firmware on 3 d3, it work more stable than on firmware from bitmain.

But I do not use the "auto-fan", because I'm afraid that long-term operation at high temperature can lead to a breakage of the boards.
Could you, please, take the target temperature into manual settings, so that everyone would decide what is more important for him, the silence or safety of the chips.
Thank you in advance!