What to do with all the old s-9s.

[zsmith]

I just went to Lowe's to pick up the last items that weren't being shipped.  Instead of the tongue and groove you are using (which looks nice in your basement BTW), I bought a 5/4" thick cedar board.  Should I just use one of these, or should I double it up?  I also have some cedar fence boards that are just under 3/4" thick, I could do one of each.  I'm just wondering how thick I should be building these wedges.   Obviously I want it close enough to channel the air but not so close it is a fire hazard.

[1714236917]

1714236917

[1714236917]

1714236917

[1714236917]

1714236917

[1714236917]

1714236917

[philipma1957]

I just went to Lowe's to pick up the last items that weren't being shipped.  Instead of the tongue and groove you are using (which looks nice in your basement BTW), I bought a 5/4" thick cedar board.  Should I just use one of these, or should I double it up?  I also have some cedar fence boards that are just under 3/4" thick, I could do one of each.  I'm just wondering how thick I should be building these wedges.   Obviously I want it close enough to channel the air but not so close it is a fire hazard.

did you get the foamed silver insulation I linked?

It is pretty heat resistant.

I had two wedges say 1/2 inch away from the center board.
I ended up using only the center hash board and I pulled the two outside boards.

I have around 26 s9s with five or six of them having dead boards so it was easy to make the one board s9.

[zsmith]

No I couldn't find it at the Lowe's I was at.  I got some silver insulation like that but it's non adhesive.  I was just going to screw it on.

1/2" away from the has boards, thanks, I can make it like that.  I'm still waiting on the delta fans but have pretty much everything else.  I am going to do the wedges tomorrow, so it's all ready to go when the delta fans arrive.

I just have the one s9 because I only have one 220v circuit available for mining, the rest are 110v.  Although now that this space heater s9 can run easily on 110v, I can get something else to put on the 220v.

[philipma1957]

No I couldn't find it at the Lowe's I was at.  I got some silver insulation like that but it's non adhesive.  I was just going to screw it on.

1/2" away from the has boards, thanks, I can make it like that.  I'm still waiting on the delta fans but have pretty much everything else.  I am going to do the wedges tomorrow, so it's all ready to go when the delta fans arrive.

I just have the one s9 because I only have one 220v circuit available for mining, the rest are 110v.  Although now that this space heater s9 can run easily on 110v, I can get something else to put on the 220v.

yeah  it will do 4th and 400 watts with one board.

if you have the older firmware from dec 2018  low speed does less and is quieter.

[zsmith]

I finally had some time to assemble this.  I also found that adhesive backed insulation.   I put it together as per your instructions and am getting 4.7TH/s with an 81 degree chip temperature.  I cut the boards 10 1/4" by 4 5/8th" by 1 1/4" thick.  I think my wedges are a little closer to the hash board than yours is, as my board was thicker.   It seems to be working just fine.

[philipma1957]

I finally had some time to assemble this.  I also found that adhesive backed insulation.   I put it together as per your instructions and am getting 4.7TH/s with an 81 degree chip temperature.  I cut the boards 10 1/4" by 4 5/8th" by 1 1/4" thick.  I think my wedges are a little closer to the hash board than yours is, as my board was thicker.   It seems to be working just fine.

Quiet right?

[zsmith]

Yeah, I think the Antminer PSU is actually louder than the AntminerS9 now, switching out the PSU makes it even quieter.

[philipma1957]

Yeah, I think the Antminer PSU is actually louder than the AntminerS9 now, switching out the PSU makes it even quieter.

Yeah I use a 1000 watt Corsair. I have also used a 1500 watt Corsair.

[taserz]

yeah  it will do 4th and 400 watts with one board.

if you have the older firmware from dec 2018  low speed does less and is quieter.

what about clocking it down with a firmware modification?

edit: voltage

[philipma1957]

Brains would work well.
March 2019 may be good.
Dec 2018 works well.

I have run a single board from 2.5 to 4.7 th

Some settings did 100 watts a th
Some did 88 watts a th.

I only built one as most gear is in Clifton NJ not HOWELL NJ

I have a bad m10 that I am trying to get aboard to work. It would be a copy of the s9 idea.

[DaveF]

Although not nearly as efficient (or even BTC related) I just did something similar with an L3+
Just unplugged 2 boards (left the other 2 in) and it's a nice just about dead silent 250MH/s scrypt space heater.

Going to work on power and speed vs fanspeed and noise while playing with the number of boards but, it might be nice in the back room of the condo for the winter.

Makes you wonder how much gear we can keep running by doing this.

Going to play with an A721 next.

-Dave

[zsmith]

When I put mine together, I couldn't find the thick spacer that I had ordered.   So, since I had a 2 pack of the thinner ones, I used that on both sides.  I found the thick spacer sitting around, so I put it on.  I didn't notice a difference either in noise, temps, fan speed or hashrate.  So if someone was trying to save a few bucks, they get away with using a 2 pack of thinner spacers.

[philipma1957]

at davef  i have this miner in clifton and i have a s 7ln

i am going to clifton mon or tues after thanksgiving maybe we can get together.

i also have a avalon a721 working.

[taserz]

So the firmware I last uploaded to my thread in the software section. Also can be found here: https://asic.to/firmware-for-antminer-s9-ij-17-5-th-s-70w-th/

Can do 70w-75w/th  at around 10th.

[Philipma1957cellphone]

I am going to play around with it.  Is it good with s9 s9i s9j? I also have some s9k

[taserz]

Yeah, it works on I and J. I am not 100% about it working on the K so hold off on that I will confirm because otherwise you got to flash the board back to life and it's a major pain in the ass.

This is the instructions for the S9's https://asic.to/documentation/

Pardon the shitty language I have to rewrite it from scratch but I think I am going to re-write it for the S17 and T17 since the S9's are on their last leg.

There have been people that have gotten 2 s9's with 1 fan each running at 21th at 1500w off one psu. The autotune will be the saving grace for maximum efficiency.

Edit 4:

475 - 8.0 - 10 TH/s - 750 watt
550 - 8.2 - 11,6 ths - 950 watt
(78 waтт / THs)
631 - 8.3 - 13,5 ths - 1100 watt
(81 waтт / THs)
700 - 8.6 - 14,9 ths - 1300 watt
(85 waтт / THs)
750 - 8.7 - 16.1 ths - 1450 watt
(90 waтт / THs)

edit 5:

Although not nearly as efficient (or even BTC related) I just did something similar with an L3+
Just unplugged 2 boards (left the other 2 in) and it's a nice just about dead silent 250MH/s scrypt space heater.

Going to work on power and speed vs fanspeed and noise while playing with the number of boards but, it might be nice in the back room of the condo for the winter.

Makes you wonder how much gear we can keep running by doing this.

Going to play with an A721 next.

-Dave

now is that with stock firmware or are you making it worth a little harder or less through software?

[DaveF]

at davef  i have this miner in clifton and i have a s 7ln

i am going to clifton mon or tues after thanksgiving maybe we can get together.

i also have a avalon a721 working.

I'm good on HW at the moment.
At the moment I have two customers who are getting out of mining and they are just leaving their gear behind as it does not pay to ship. All of them older S9 units, all (most?) with some issues.

Probably going to see if I can mix & match good boards and go from there.

-Dave

[sidehack]

Ooh, firmwares. Maybe in early December I'll have time to test out some of that, rig up S9 space heaters for the new shop. I've seen BM1387 go below 70W/TH at the chip and landing a couple machines below 80W/TH wall would be nice.

[taserz]

Ooh, firmwares. Maybe in early December I'll have time to test out some of that, rig up S9 space heaters for the new shop. I've seen BM1387 go below 70W/TH at the chip and landing a couple machines below 80W/TH wall would be nice.

If you don't want crazy hash rate then you can go below 70w/th but we are talking really low hashrate.

[philipma1957]

setting these up and locking them