GekkoScience has a new pod miner, just in time for Christmas

[gergar]

thermal conductivity is impacted due to height of thermal path so, don’t exceed 1mm so still stays in a good small size and then you dont need crazy high conductivity pads 20+ and a 13+ will do a great job, 0.5 can be very thin and can get easily damaged so a .75-1mm to my experience is a good choice and still will effectively conduct heat to the heatsink.

Thanks, I think I will order a set of these Iceberg pads: https://www.iceberg-thermal.com/product/consumer/thermal-pad/driftice/. 80x40 should be a near to perfect fit, just need to cut the length a little. Hope that I won't mess up with the upper heatsinks' thermal pad when re-screwing the bottom heatsinks...

Actually the unit is running very well at the moment, but I don't think I can leave it now without these pads attached, now that I know of the air gap.

It's like @n0nce has said, this neat device makes you want to tinker with it. 

@sidehack: Would be great if you could share details on the thermal pads used for the upper heatsinks.

The upper are 0.5mm 20w/k. the ones you selected are ok for the back plate, these can be an top plate option as they are 20w/mk and they have different sizes so you can order  0.5 just in case and if you see ok to have both the same type then a 1mm (the pads can be cut with no effort with regular pair of scissors, so 1x0.5 will be enough for 1 unit top plate the two heatsinks, and also will work the same to backplate) :

https://www.amazon.com/Kritical-Thermal-Pads-Conductivity-othermicroelectronic/dp/B0B1ZF7MZ7/ref=sr_1_18?crid=2MYFZWYK4O5F2&keywords=thermal%2Bpath%2B20w%2Fmk%2B0.5&qid=1674689278&sprefix=thermal%2Bpath%2B20w%2Fmk%2B0.5%2Caps%2C152&sr=8-18&th=1

[gergar]

Two things:

1) The CompacF mines at a minimum of 16 diff - I've coded it to not go lower.
The R909 miners at a minimum of 64 diff - I've coded to not go lower.
These values are already below what is needed.
People should expect pools to be pissed off at them if they tried to DDoS the pool with lower values.

2) All about worker difficulty: https://kano.is/index.php?k=workdiff

Hi @Kano, I tired the api and made it work half way, I changed the number on ASIC ID from 0 to 1 to modify the 2nd unit and it responds "ASC 0 set OK", and it set the frequency to all chips on Asia 0 vs. 1, and also using chip lets say 0,chip,0:0 it set all to 0 on ASC 0 vs. only  chip 0. then if I change to 1,chip,0:0 it sets same all to 0 on ASC 0.

this is how I am sending the payload: {"command": "ascset", "parameter": "[{1,chip,0:0}]"} (then I encode it) is this OK? 

initially I did this but sends error, and landed making it partially work with the previous one {"command": "ascset", "parameter": "[{"ID":"1","option":"chip","value":"0:0"}]"}
or for frequency to all {"command": "ascset", "parameter": "[{"ID":"1","option":"freq","value":"0"}]"}

hope you can give me some advise.

[kano]

https://github.com/kanoi/cgminer/blob/master/API-README#L70

So {"command":"ascset","parameter":"1,chip,0:0"}

However, you don't need to use JSON, so as per https://kano.is/gekko.php

java API "ascset|1,chip,0:0" MinerIP

[gergar]

https://github.com/kanoi/cgminer/blob/master/API-README#L70

So {"command":"ascset","parameter":"1,chip,0:0"}

However, you don't need to use JSON, so as per https://kano.is/gekko.php

java API "ascset|1,chip,0:0" MinerIP

I will give it a try, if not i will try to call using shell the JAVA Api, just wanted to avoid os calls. THANK YOU!

[rdbase]

so i will run my 2 gekko usb hubs (with 3 compac f sticks each) together with the 2 new r909 pod miners using a rpi4. if everything runs well and is configured well i would get ~3.6th/s together

Did it work out to be this hashrate?
I would imagine stable at the right settings and the right fan placements for the one on the usb hubs.
After 2~ months later you should have an idea if this arrangement works.
Was eyeing a gekkoscience pod for a while and I might pull the trigger on one in this setup if the time is right.

How do they compare to buying a mars solo miner from bitcoin merch and plugging in several of the compaq F1s into a hub?
Would the price of the 909 be relativity the same for the amount of hashrate produced?

[CochnocherCrypto]

Hey everyone - so I see lots of chatter about thermal pads here. I routinely re-paste all of my asic miners every 3 months or so because they run 24/7 and my cat's dander is like a gnarly dust invasion for my miners because of all of the fans in my apartment blowing it directly at them lol. Has anyone removed the top heatsinks from the R909 and can they confirm wether it has pads or paste on the chips?

[os2sam]

Hey everyone - so I see lots of chatter about thermal pads here. I routinely re-paste all of my asic miners every 3 months or so because they run 24/7 and my cat's dander is like a gnarly dust invasion for my miners because of all of the fans in my apartment blowing it directly at them lol. Has anyone removed the top heatsinks from the R909 and can they confirm wether it has pads or paste on the chips?

Not sure if this answers your question or not, but it seems similar:

https://bitcointalk.org/index.php?topic=5423227.msg61628663#msg61628663

[gergar]

Hey everyone - so I see lots of chatter about thermal pads here. I routinely re-paste all of my asic miners every 3 months or so because they run 24/7 and my cat's dander is like a gnarly dust invasion for my miners because of all of the fans in my apartment blowing it directly at them lol. Has anyone removed the top heatsinks from the R909 and can they confirm wether it has pads or paste on the chips?

I did take all apart it has pads 20w/mk 0.5mm i replaced with new same specs.

Confirmed also here:
https://bitcointalk.org/index.php?topic=5423227.msg61628663#msg61628663

[kano]

https://github.com/kanoi/cgminer/blob/master/API-README#L70

So {"command":"ascset","parameter":"1,chip,0:0"}

However, you don't need to use JSON, so as per https://kano.is/gekko.php

java API "ascset|1,chip,0:0" MinerIP

I will give it a try, if not i will try to call using shell the JAVA Api, just wanted to avoid os calls. THANK YOU!

Whatever you use, there are 2 formats

"ascset|1,chip,0:0"
or
'{"command":"ascset","parameter":"1,chip,0:0"}'

(aside: I designed and wrote the cgminer API)

[altair_tech]

I was thinking about ways to push this beyond the 2.4-2.5Th reported by other users.
One way could be to use a bigger fan and adapter to funnel more air CFMs into the pod.
For example a 120mm or 140 mm fan can push 2-3x air through the heatsinks, while still staying fairly quiet (<25db).
I've seen some s9 space heater designs (skip to page 9) that are replacing the stock 120mm fan with 140mm fan to allow the machine to run quietly without compromising on cooling.

Would like to know from others here, if this makes sense and is worth a try.

-Aviral

[MoparMiningLLC]

Our (cryptocloaks) space heater replaces an s9’s psu fan and miner 120mm with 140mm fans - and it stays pretty quiet after that. Around 45-50 dB

If it helps, the fan we used:

Noctua NF-A14 iPPC-3000 PWM, Heavy Duty Cooling Fan, 4-Pin, 3000 RPM (140mm, Black)

 https://a.co/d/6r1YEdt

[yettihead]

I was thinking about ways to push this beyond the 2.4-2.5Th reported by other users.
One way could be to use a bigger fan and adapter to funnel more air CFMs into the pod.
For example a 120mm or 140 mm fan can push 2-3x air through the heatsinks, while still staying fairly quiet (<25db).
I've seen some s9 space heater designs (skip to page 9) that are replacing the stock 120mm fan with 140mm fan to allow the machine to run quietly without compromising on cooling.

Would like to know from others here, if this makes sense and is worth a try.

-Aviral

That is what I have done.  I created an adapter to go up to a 92mm fan as the airflow increases from 55.5 m³/h for the 80mm up to 78.9 m³/h for the 92mm.  The 120mm could easily be done, just trying to keep these somewhat small, but the airflow would increase up to 102.1 m³/h.  I do have a 140mm fan I could experiment with, but the pressure drops.  Almost everything I 3D print is for mining purposes.

https://imgur.com/a/gidpBJ8

[gergar]

https://github.com/kanoi/cgminer/blob/master/API-README#L70

So {"command":"ascset","parameter":"1,chip,0:0"}

However, you don't need to use JSON, so as per https://kano.is/gekko.php

java API "ascset|1,chip,0:0" MinerIP

I will give it a try, if not i will try to call using shell the JAVA Api, just wanted to avoid os calls. THANK YOU!

Whatever you use, there are 2 formats

"ascset|1,chip,0:0"
or
'{"command":"ascset","parameter":"1,chip,0:0"}'

(aside: I designed and wrote the cgminer API)

Thank you @Kano!!! yeah I am aware you are the designer and developer amazing job!!! it is impressive THANK YOU!!

[gergar]

I was thinking about ways to push this beyond the 2.4-2.5Th reported by other users.
One way could be to use a bigger fan and adapter to funnel more air CFMs into the pod.
For example a 120mm or 140 mm fan can push 2-3x air through the heatsinks, while still staying fairly quiet (<25db).
I've seen some s9 space heater designs (skip to page 9) that are replacing the stock 120mm fan with 140mm fan to allow the machine to run quietly without compromising on cooling.

Would like to know from others here, if this makes sense and is worth a try.

-Aviral

That is what I have done.  I created an adapter to go up to a 92mm fan as the airflow increases from 55.5 m³/h for the 80mm up to 78.9 m³/h for the 92mm.  The 120mm could easily be done, just trying to keep these somewhat small, but the airflow would increase up to 102.1 m³/h.  I do have a 140mm fan I could experiment with, but the pressure drops.  Almost everything I 3D print is for mining purposes.

https://imgur.com/a/gidpBJ8

Nice one!! i used a high CFM Axial fan, it is in some of my postings, i will share my results of my testing just needed to do one more … but those 80mm fans made a lot i can tell full speed kept the heatsinks on 37 Degree Celsius and i was running at 725Mhz 3.2-3.4 T and power was strangely flat to about 140W the issue i saw was more on the asic was not keeping up the frequency. but i can tell got interesting results I will post them.

[sidehack]

Holy crap did you say 3.2TH? 725MHz should see 2.9TH but that's still pretty nuts. The main regulator should cap at around 120 watts output.

[kano]

Alas, it does require running for a while.
I've even had 2.9TH/s reported at startup due to random luck.

As long as you reset the display as explained at the beginning of https://kano.is/gekko.php#perf
and then let it run for a few hours, then the reported hash rate is meaningful.

[cygan]

so i will run my 2 gekko usb hubs (with 3 compac f sticks each) together with the 2 new r909 pod miners using a rpi4. if everything runs well and is configured well i would get ~3.6th/s together

Did it work out to be this hashrate?
I would imagine stable at the right settings and the right fan placements for the one on the usb hubs.
After 2~ months later you should have an idea if this arrangement works.
Was eyeing a gekkoscience pod for a while and I might pull the trigger on one in this setup if the time is right.
✂

my setup is running very stable so far, as you can see below
unfortunately i have only one compac f stick running on one of the two usb hubs - due to overclocking the other ports on the hub have died (and i'm waiting for a new gekko hub delivery )
all hardware is only connected to one and the same rpi4

Code:

0: GSF 10051796: BM1397:01+ 525.00MHz T:515 P:510 (24:12)  |  100% WU:100% | 309.7G / 312.3Gh/s WU: 4363.1/m
1: GSF 10051619: BM1397:01+ 525.00MHz T:525 P:525 (24:12)  |  100% WU:100% | 321.9G / 349.9Gh/s WU: 4887.6/m
2: GSF 10053618: BM1397:01+ 525.00MHz T:525 P:525 (24:12)  |  100% WU:100% | 361.2G / 348.9Gh/s WU: 4873.6/m
3: GSF 10070009: BM1397:06+ 680.00MHz T:680 P:662 (3:2)    | 88.1% WU: 90% | 2.428T / 2.461Th/s WU:34383.3/m
4: GSF 10070003: BM1397:06+ 640.00MHz T:640 P:635 (3:2)    | 88.2% WU: 91% | 2.487T / 2.347Th/s WU:32788.6/m
5: GSF 10053617: BM1397:01+ 525.00MHz T:525 P:525 (24:12)  |  100% WU:100% | 300.3G / 343.8Gh/s WU: 4802.8/m

[gergar]

Holy crap did you say 3.2TH? 725MHz should see 2.9TH but that's still pretty nuts. The main regulator should cap at around 120 watts output.

Ohh now i see why i get flat behavior after 700mhz, the power i am measuring includes the axial fans and my RBPI to get to 725 i push my fans to 70%, i assume these are the extra 20w.

This is what i see:
- 725 not stable at all- got 3.2 for 3 minutes then crashes down to 500Mhz and as it reboots and reboots Hashrate became to 800G but power never came down. Temps on heatsinks were stable at 45 degrees celsius. I set anoush pull using original in front and exhaust acial at 50% the front i put it on tilted position resting on the cables and pushing the air towards the board (i guess at 45 degrees of angle) that caused higher heat efficiency and took the heatsinks to stable 36 degrees celcius BUT 0 effect on stability… and power got to 138 ( the 3 wats i assume got from the added fan). same 3.2 then crash the 800.

-700 push pull stable on 2.7-2.8 i did not saw these going higher than that after 24 hrs, temps stable on 35 degrees the hottest spot. consumption still high 135.

-650 the current i have only pull axial at 2700 rmps silent ops, stable 2.57- 2.6 T @ 114.5w consumption/ 42 Degree celcius at heatsinks /  net that is quite great vs other setups as looks close to 45j/t and the others were like 50.

something is wrong at 725, i have no idiea what to change ( but not sure if changing stock voltage will help) i dont want ro fry them.

so we can say 3.2 is not valid as they crashes after little time… so to me at least not messing up with voltage 2.8 is the top. i am converting to water cooling but as i saw heatsinks on 35 degrees and no improvement i don’t expect it to change, same as i want it to run 24x7 650 will give better efficiency and longevity.

i am on my iphone so cannot paste the cgminer screen but miner.php and looks ugly but here it is at 650, close to 24 hr run.

Date: 17:47:01 29-Jan-2023 UTC+00:00
Computer: cgminer 4.12.1 When: 17:47:01 29-Jan-2023 UTC+00:00 Status: Success Message: 2 ASC(s)
ASC Name ID Enabled Status Temperature MHS av
MHS 5s
MHS 1m
MHS 5m
MHS
0
GSF
0
Y
Alive
1
GSF
1
Y
Alive
Total:
2,573,644.91 3,004,809.31 2,692,198.92 2,618,194.45 2,5!
2,606,626.98 2,414,314.80 2,616,199.07 2,626,635.49 2,6
5,180,271.89 5,419,124.11 5,308,397.99 5,244,829.94 5,2

[gergar]

Alas, it does require running for a while.
I've even had 2.9TH/s reported at startup due to random luck.

As long as you reset the display as explained at the beginning of https://kano.is/gekko.php#perf
and then let it run for a few hours, then the reported hash rate is meaningful.

yeah so 3.2 was luck and not sustained over time. so mine is 2.8 T highest i got but they were running very cool!!!)

@sidekick what will be the effect on moving the variable resistor on voltage? will it give me higher Hashrate/ or put me into the power cap soon? and will the asic be damaged if all left or all right? or it is safe to play with it?

[n0nce]

what will be the effect on moving the variable resistor on voltage? will it give me higher Hashrate/ or put me into the power cap soon? and will the asic be damaged if all left or all right? or it is safe to play with it?

You can definitely increase voltage if you have the cooling (which it seems, you do). Especially if you decide to go for watercooling, you should have enough thermal headroom to give it more power through that potentiometer.
Reducing it from stock may be interesting for improving efficiency, but as far as I know these are already individually tuned by the factory and set to a good safe value. So if anything, I'd find it interesting to see how far it can go with ample cooling and higher 'power target'.