LightningAsic usb miners based Gridseed GC3355 Tech Support Thread

[testthewhiterabbit]

Also, does anyone know if it is possible to run 10 miners in LTC mode off a single power supply?  Or more, say 20 or 40?

I'm thinking of doing something to others in this thread, use a 4U case and remove the fans.  Run 20+ miners, and use some fans at the front/rear of the case.

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[lajz99]

I ordered 5 miners without the controller, power supply, etc. 

Can someone let me know what power supply, cabling I will need?  Appreciate the help.

[cchan]

I ordered 5 miners without the controller, power supply, etc.  

Can someone let me know what power supply, cabling I will need?  Appreciate the help.

You need a "12V,5A" power adapter.
Like this:


USB cable is just ok.

[darkfriend77]

I ordered 5 miners without the controller, power supply, etc.  

Can someone let me know what power supply, cabling I will need?  Appreciate the help.

You need a "12V,5A" power adapter.
Like this:


USB cable is just ok.

What are the measurement of the Plug ... 2.5mm - 5.5mm ?

[FreeJack2k2]

I really want to know what Jack did to get those 500+kh/s hashrates in his "secret photo." I've settled on 850MHz where some end up just above 400, but never above 500. At 900MHz the hashrate takes a nosedive. Maybe there's a new firmware they're working on that will give us more tweaking options? The communication has been less than optimal, he answers a question I didn't ask, every time I ask him something via e-mail.

[worldlybedouin]

Can anyone figure out how to get into the controller?  Is it possible to hook up via USB to the computer and access the filesystem somehow?

I've read that SSH is running on it but I belive only Jack has the password for it.

[worldlybedouin]

Also, does anyone know if it is possible to run 10 miners in LTC mode off a single power supply?  Or more, say 20 or 40?

I'm thinking of doing something to others in this thread, use a 4U case and remove the fans.  Run 20+ miners, and use some fans at the front/rear of the case.

I should think it's possible if your PSU has enough power.  I'm not good with electricity so I can't say for sure or how the wiring would work.  I know that TheMage did splice a molex wire connector to one of his miners and rig that up to a computer PSU....so if you can figure out the specifics of the wiring/wattage then you should be able to apply that to 20+, right?

[worldlybedouin]

I really want to know what Jack did to get those 500+kh/s hashrates in his "secret photo." I've settled on 850MHz where some end up just above 400, but never above 500. At 900MHz the hashrate takes a nosedive. Maybe there's a new firmware they're working on that will give us more tweaking options? The communication has been less than optimal, he answers a question I didn't ask, every time I ask him something via e-mail.

I'm at 800MHz and I'm getting around 4Kh rate...it fluctuates up and down a bit but for the most part stays around the 3900-4000 range.

[FreeJack2k2]

I really want to know what Jack did to get those 500+kh/s hashrates in his "secret photo." I've settled on 850MHz where some end up just above 400, but never above 500. At 900MHz the hashrate takes a nosedive. Maybe there's a new firmware they're working on that will give us more tweaking options? The communication has been less than optimal, he answers a question I didn't ask, every time I ask him something via e-mail.

I'm at 800MHz and I'm getting around 4Kh rate...it fluctuates up and down a bit but for the most part stays around the 3900-4000 range.

So weird...if I set it at 800MHz I end up with around 3Kh/s...most miners won't go above 300.

[worldlybedouin]

I really want to know what Jack did to get those 500+kh/s hashrates in his "secret photo." I've settled on 850MHz where some end up just above 400, but never above 500. At 900MHz the hashrate takes a nosedive. Maybe there's a new firmware they're working on that will give us more tweaking options? The communication has been less than optimal, he answers a question I didn't ask, every time I ask him something via e-mail.

I'm at 800MHz and I'm getting around 4Kh rate...it fluctuates up and down a bit but for the most part stays around the 3900-4000 range.

So weird...if I set it at 800MHz I end up with around 3Kh/s...most miners won't go above 300.

I don't mean to disparage anyone's reputation, but I believe that in general these miners and/or controller unit is/are flawed.  Just a gut feeling but I think that the quality control and manufacture of these is not as stringent as one would see for silicon parts rolling off the Nvidia/AMD lines. 

My hope (and gut instinct) is that its a software issue which can be resolved via future firmware updates...because if it was something specific to the actual chips, well, I doubt the miners would work at all.

Until then I'm happy to work with the folks here to try and answer questions or test ideas out.

[richmke]

Also, does anyone know if it is possible to run 10 miners in LTC mode off a single power supply?  Or more, say 20 or 40?

I did the calculations, and you can run 10 miners in LTC only mode off one of the PSU's they provide.

If you have your own PSU, then it is a matter of getting the right sized PSU.

[richmke]

Instead of getting a separate 5 volt line to down volt the fans, I am thinking of hooking the fans of miners in Series. That would give 6 volts to each fan pair, and not require a different PSU.

[worldlybedouin]

Ok, so interesting observation here...

I was previously mining Doge with the 10miners...as a test I wanted to see what happens when I switched to a profit switching pool.

I kept all the config settings exactly the same (even created the exact same worker names on TradeMyBit as I had on my Doge pool)...

And now my rate is about 2700 instead of the 4000 I was seeing (http://imgur.com/Uu2zvkG).  I'm not sure how much of this is because of the way profit switching pools bounce from one coin to the next...or if this is an indicator of something else.

I think I'll go back to straight mining a single coin...

[worldlybedouin]

Instead of getting a separate 5 volt line to down volt the fans, I am thinking of hooking the fans of miners in Series. That would give 6 volts to each fan pair, and not require a different PSU.

I'd love to see some noob instructions on rewiring the fans.

[Beastlymac]

I ordered 5 miners without the controller, power supply, etc.  

Can someone let me know what power supply, cabling I will need?  Appreciate the help.

You need a "12V,5A" power adapter.
Like this:


USB cable is just ok.

What are the measurement of the Plug ... 2.5mm - 5.5mm ?

I think it is 2.1

[Pistachio]

I cannot tell if it should be 2.1mm/5.5mm, but a 2.5mm/5.5mm seems to fit fine for the beta models with the white button. Also, you may want to get a 12v 6a power supply for each unit because the 5a one I was sent gets really hot. I have a 12v 10a that I use instead. I should note that I am overclocking to 750 from 600 in cpuminer.

I ordered 5 miners without the controller, power supply, etc.  

Can someone let me know what power supply, cabling I will need?  Appreciate the help.

You need a "12V,5A" power adapter.
Like this:


USB cable is just ok.

What are the measurement of the Plug ... 2.5mm - 5.5mm ?

[Pistachio]

I really want to know what Jack did to get those 500+kh/s hashrates in his "secret photo." I've settled on 850MHz where some end up just above 400, but never above 500. At 900MHz the hashrate takes a nosedive. Maybe there's a new firmware they're working on that will give us more tweaking options? The communication has been less than optimal, he answers a question I didn't ask, every time I ask him something via e-mail.

They are not stable at all but I have had two units go above 500Kh for brief periods before crashing back to the 250-350 range. See here http://waffles.wilschrader.com/stats?address=15NCWjqCADxTVWdhM8rThdnQTXi6Fbcy19 for current hash of two Gridseed units.

[richmke]

I got them working. I think part of the problem was an internet connection issue.

I am starting to increase the clock speed. Interesting how each unit responds differently. v2 of controller needs to set speed of each unit individually.

Insert Quote
Can anyone figure out how to get into the controller?

The Controller gets is IP address from the DHCP server. So, you have to somehow figure out which address it is getting. I can login to my router, which serves at the DHCP server, and look at which addresses have been assigned.

[richmke]

They are not stable at all but I have had two units go above 500Kh for brief periods before crashing back to the 250-350 range. See here http://waffles.wilschrader.com/stats?address=15NCWjqCADxTVWdhM8rThdnQTXi6Fbcy19 for current hash of two Gridseed units.

How are your 5 minute averages? Waffle pool has set the difficulty at 512, and that has caused a lot of short-term variability. So, it might be the pool settings, and not your miners.

[richmke]

Instead of getting a separate 5 volt line to down volt the fans, I am thinking of hooking the fans of miners in Series. That would give 6 volts to each fan pair, and not require a different PSU.

I'd love to see some noob instructions on rewiring the fans.

1) Unscrew the fan (4 screws). No need to detach the fan bracket underneath.
2) Turn unit over, and remove 4 long screws.
3) Remove the large heat sink. Be careful to keep the heat-transfer tape clean.
4) Cut RED wire on Miner 1, about midway. You want to be able to extend the fan end of each wire outside of the miner, but leave enough wire so that you can reconnect if you want to.
5) Repeat 1 through 3 with another miner (Miner 2).
6) Cut Black wire on Miner 2 as in step 4.
7) Cover miner side of cut wires with electrical tape to prevent shorting.
Use some other wire, and connect the red fan wire of Miner 1 to the black fan wire of Miner 2.
9) Reassemble being careful not to trap anything wires between the heat sink tapes.
10) Make sure that both miners are powered off the same PSU. That means you will need 4 miners on PSU1 and 6 miners on PSU2.

In theory, you can power all 10 miners off the same PSU. This assumes you are NOT mining bit coins, and are using the Controller, which turns off that part of the core. I am guessing you can power 20-40 units off one PSU in LTC only mode with the BTC miner turned off. I think the LTC miner is 8 watts, but I do not know if that includes the fan wattage.