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Author Topic: GekkoScience 2Pac/Compac BM1384 Stickminer Official Support Thread  (Read 148112 times)
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marousi
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July 09, 2018, 09:11:24 AM
 #1981

We need more powerful usb hubs.
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July 09, 2018, 09:45:23 AM
 #1982

this one seems to be good for a bunch of 2Pacs.

https://www.eyeboot.com/sipolar-10-port-usb-hub.html

but shipping to europe + import taxes (€30+, based on item price + price of  shipping) makes it go beyond $100 for me.
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July 09, 2018, 04:42:03 PM
 #1983

https://www.eyeboot.com/sipolar-10-port-usb-hub.html - can I run 10 2pacs at 325 Mhz on this hub ?
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July 09, 2018, 06:30:47 PM
 #1984

https://www.eyeboot.com/sipolar-10-port-usb-hub.html - can I run 10 2pacs at 325 Mhz on this hub ?


That hub delivers 2.1A per port. The best you can do is ~250MHz @ 1.46V VCore, using all 10 ports.

Coining bits since 2017 
Avalon 741 x 2; BM S7 x 1, C1 x 1, S3 x 1; GekkoScience R808 x 2, 2Pac x 8
Kano Pool is the BEST BTC mining pool.
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July 10, 2018, 07:08:25 AM
 #1985

Thanks, so it is not worth buying ($65 + delivery charge)
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July 10, 2018, 09:54:34 AM
 #1986

I think he's saying it's good enough to have 10 running and quite fast (and not the stock 100MHz speed)

a lot of the (cheaper) 'powered' usb hubs can barely give enough power to have 2 2Pacs running.
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July 12, 2018, 09:52:14 AM
 #1987

sidehack could design and build a usb hub that is powerful enough to run the 2pacs at the highest speed.
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July 12, 2018, 12:41:19 PM
 #1988

Workin' on it.

Got a new 28-135GH stick miner!
Currently in development - 100+GH USB stick; 800GH 60W pod; 6TH volt-adjustable S1/3/5 upgrade kit
Server PSU interface boards and cables. USB and small-scale miners. Hardware hosting, advice and odd-jobs. Supporting the home miner community since 2013 - http://www.gekkoscience.com
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July 12, 2018, 02:42:03 PM
 #1989

Workin' on it.

+1
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July 20, 2018, 12:13:29 PM
 #1990

I got my Sipolar powered hub a few days ago.

At first it only seemed to work with 2 2PACs as one of the first 2 dropped out when adding the 3rd one but now all 3 of them seem to work at equal speed (225MHz 24.5GH/s 334.5WU)

Interesting fact is that Slushpool shows 79 years and 2 months to reach that 0.1 bitcoin payout limit Smiley
I thought it showed way lower when I only had 1 stick running tho so I'm kind of confused about this 'guess'.

Am I better on a low crowd pool than this overcrowded one with 200.000+ workers?
Is there one for the 'monoPac', 2Pac, Pod owners?

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July 20, 2018, 12:37:42 PM
 #1991

I don't know how I saw over it but a search for "2pac pool" lead to the first post of this thread mentioning ckpool, I moved to this pool now.
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July 20, 2018, 01:58:36 PM
 #1992

Am I better on a low crowd pool than this overcrowded one with 200.000+ workers?
Is there one for the 'monoPac', 2Pac, Pod owners?

CK's pool is great choice...but for a couple 2pacs you may want to consider his solo pool. It'd be more lottery-ish for you though, as you'd only get paid if you find the block.

https://bitcointalk.org/index.php?topic=763510.0
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July 20, 2018, 04:01:25 PM
 #1993

thanks jsays,

I also asked on their irc channel and they adviced to give the solo mining a try since it's always a lottery like you wrote.

For some reason I only saw this "accepted..." passing by once and then 40 minutes nothing.

I spotted that the difficulty was set to 10.000.

If I change it to 32 the "accepted..." passes by nearly constantly.

Now I was wondering what the optimial difficulty is for a 2PAC running near 25GH/s.
And do I need to multiply it by 3 since I have 3 2PACs or is this the same for each device?

Edit: I just noticed it went up to 39 automaticaly?
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July 20, 2018, 04:07:25 PM
 #1994

I spotted that the difficulty was set to 10.000.

If I change it to 32 the "accepted..." passes by nearly constantly.

Now I was wondering what the optimial difficulty is for a 2PAC running around near 25GH/s.
And do I need to multiply it by 3 since I have 3 2PACs or is this the same for each device?

Edit: I just noticed it went up to 39 automaticaly?

You could easily bump that 32 up, I would probably double it and set it to start with a suggest-diff of 64. Then, if you see the pool continue to raise that, that's a good indication it can, and probably should be higher.
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July 20, 2018, 04:14:04 PM
 #1995

I set it to 64 and it's accepting nearly every second.

thanks, j
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July 23, 2018, 02:20:42 PM
 #1996

I set it to 64 and it's accepting nearly every second.

thanks, j

With suggested diff of 128, three 2pac running at 212.25 get accepteds ~ 6/minute.
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July 23, 2018, 09:54:22 PM
 #1997

I don't know the technical part of it but when you go from prefered diff 32 to 128 the 'solve' time is 4x as long?

would that time be the same as 4 block solves of diff 32?

or is there no real relation between those?

so what is the prefered diff?

that 10.000 took ages of no output so it looked stalled but is it better in the end than the small ones?
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July 23, 2018, 10:58:55 PM
 #1998

currently have 1 2PAC , with 2 more arriving soon.  I mine CKPOOL + ANTPOOL BTC , balance strategy.  I figure earning some pennies in BTC, whilst playing lottery solo (but pooled) in  CKPOOL. 

I don't know how I saw over it but a search for "2pac pool" lead to the first post of this thread mentioning ckpool, I moved to this pool now.
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July 23, 2018, 11:04:48 PM
 #1999

I don't know the technical part of it but when you go from prefered diff 32 to 128 the 'solve' time is 4x as long?

would that time be the same as 4 block solves of diff 32?

or is there no real relation between those?

so what is the prefered diff?

that 10.000 took ages of no output so it looked stalled but is it better in the end than the small ones?

Has zero effect on your hashing hardware. All this does is lower the pool traffic. You don't send lower-value shares, but the shares you do send are weighted higher to make up the difference in your payout calculations. If you set the number too low, the pool automatically increases it to mitigate traffic. Usually set to around half a dozen shares sent to the pool per minute so the pool knows you're still connected and active, but not enough to appear spammy.

Got a new 28-135GH stick miner!
Currently in development - 100+GH USB stick; 800GH 60W pod; 6TH volt-adjustable S1/3/5 upgrade kit
Server PSU interface boards and cables. USB and small-scale miners. Hardware hosting, advice and odd-jobs. Supporting the home miner community since 2013 - http://www.gekkoscience.com
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July 23, 2018, 11:08:05 PM
 #2000

when setting up my cgminer/ linux raspberry pi , I changed frequency to 75 (1st time I started to use my 2PAC, as did not have a fan).  It now seems stuck on 75 frequency (a bit low).  In terminal I put in start up command and added 100 at end to change frequency : cgminer starts , says working at 100, but then says changing to 75 (again).  I can't find the config file (I assume this is where I would have to change).  Thanks for your help.  NB  I am just starting in mining and have limited linux knowledge.


indeed Sidehack,

I think my 2A phone charger power supply ain't stable enough but it's hard to find powered hubs in Belgium that deliver full power to each port and not the standard 0.5A.

I went back to 150MHz as I figured out this night that it stopped mining again after a while and I could not get it working again at 200, 180 either as it stopped after seconds/minutes again.

Now it worked fine through the night at 150.

this is my current stats

0: BSD 10015542: BM1384:2 150.00MHz HW:0 | 21.28G / 16.36Gh/s WU:228.5/m


Thanks for adding the leds, it's not only cool looking but it notifies me when something is wrong if it doesn't flash after a few seconds.


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