For 250 MHz I would calculate with 20 W per stick. So you need a hub with a 80 W power supply. And be aware that there may not be a current limit per port. Some hubs have a port limit of e.g. 1 A.
And don´t forget the cooling. It will be necessary at frequencies above 100 MHz.
Topic: GekkoScience 2Pac/Compac BM1384 Stickminer Official Support Thread - page 47. (Read 177300 times)
January 07, 2018, 05:53:39 AM
January 06, 2018, 09:36:03 PM
I am new at mining and I am looking into putting together my first setup. I am going to be running x4 Gekkoscience 2 pac's to begin with and I would like to run them around 200mhz-250mhz on my laptop (windows) I already have the prebuilt cgminer software installed and ready to go, I just need to get the hardware now. With the x4 Gekkoscience pac's, what would be a good usb hub? I'm looking for something no less than 10 ports.
Any input and info is greatly appreciated!!!
Any input and info is greatly appreciated!!!
January 06, 2018, 03:49:46 PM
January 06, 2018, 03:39:03 PM
Hey guys
Im sure this has already been answered but it's not easy wading through the pages of this thread.
What powered USB hubs do you all recommend? Or can I run two 2pacs off of a Pi? I don't think the pi will have enough power to tinker with them right? Can I run a pi and a powered hub? I would like to use a pi in the setup since I don't have a desktop to connect them to only a laptop.
Thanks for your help and if this has already been answered let me know and I'll keep searching.
Im sure this has already been answered but it's not easy wading through the pages of this thread.
What powered USB hubs do you all recommend? Or can I run two 2pacs off of a Pi? I don't think the pi will have enough power to tinker with them right? Can I run a pi and a powered hub? I would like to use a pi in the setup since I don't have a desktop to connect them to only a laptop.
Thanks for your help and if this has already been answered let me know and I'll keep searching.
January 06, 2018, 01:07:32 PM
Yes, exactly.
January 06, 2018, 12:13:13 PM
You can set it to 150 MHz and see if there are any HW errors. If not, it´s fine. If the number of HW errors is incrementing you need to turn up the voltage a little bit. If the number stops incrementing, it´s fine. Otherwise there is not enough power and one stick should zombie. If that happens, you know your limit.
And the other way around, right? I can slowly turn the voltage down a little, as to avoid heating issues, until I start seeing HW errors?
January 06, 2018, 09:13:38 AM
You can set it to 150 MHz and see if there are any HW errors. If not, it´s fine. If the number of HW errors is incrementing you need to turn up the voltage a little bit. If the number stops incrementing, it´s fine. Otherwise there is not enough power and one stick should zombie. If that happens, you know your limit.
January 06, 2018, 08:20:02 AM
Typically, a dedicated "charging port" doesn't carry data. I'm surprised you're getting anything out of it if you're plugged into one of those.
Yes, I know, but the UH700 have 7 "normal" ports where three can become charging ports with 1.5 A each if the external power cable is attached.
But that's where it should be at 100 MHz. Still surprised you're getting anything out of a "charging port" but happy you're on track now.
I'm just happy that it works, and seem to work stable now. Next mission is to see what I have to do to get it to 150 MHz, but that's another part
And yes, I'm really thankful for all the support I've gotten through here
January 05, 2018, 09:42:28 PM
... 1.5 A per charging port on 3 specific "charging ports".
Typically, a dedicated "charging port" doesn't carry data. I'm surprised you're getting anything out of it if you're plugged into one of those.
Quote
So... it's turned to 3 o'clock, I'm running at 100 MHz and on a port with 1.5 A... and it's giving me a reliable 2.865 GH/s on average something happened, and it popped up to ~10 GH/s...
But that's where it should be at 100 MHz. Still surprised you're getting anything out of a "charging port" but happy you're on track now.
January 05, 2018, 07:05:16 PM
And more importantly... 3 o'clock, with the USB side being 6 o'clock?
ExactlySo... it's turned to 3 o'clock, I'm running at 100 MHz and on a port with 1.5 A... and it's giving me a reliable
January 05, 2018, 01:20:04 PM
And more importantly... 3 o'clock, with the USB side being 6 o'clock?
Exactly January 05, 2018, 11:36:09 AM
11 o'clock is way too hot. That's like if you wanted to run 350MHz or higher. 3 o'clock and 100MHz should be at or under 1 amp draw.
I haven't touched it. Ever. So, 3 o'clock for 100 MHz, and see what happens?
And more importantly... 3 o'clock, with the USB side being 6 o'clock? As in pointing to the right of the stick, when I have it in front of me with the USB pointing toward me and the cooling block pointing away and on the other side?
January 05, 2018, 11:14:09 AM
11 o'clock is way too hot. That's like if you wanted to run 350MHz or higher. 3 o'clock and 100MHz should be at or under 1 amp draw.
January 05, 2018, 11:02:48 AM
And it has ben stable averaging around 3,4 GH/s for the last 12 hours. Do you still suggest that I should turn the potentiometer to 3 o'clock? And as a back-up check, what should it be at for 150 MHz and 1.5 A (or won't I be able to run it at that?
In post#1 is a table as an overview of the current related to frequency and voltage. If you turn your voltage to 1.26 V at 150 MHz it should run with 1.05 A. So that should be enough.Do you hav something to mesaure the voltage? On what position is the flat side of your voltage pot now?
Not the best of pictures http://sv.tinypic.com/view.php?pic=bdwnl3&s=9 and this might be better http://i67.tinypic.com/t54oxv.jpg but I'd say that the flat side is on 11 o'clock with the USB port side as 6 o'clock.
January 05, 2018, 10:53:20 AM
If your pool doesn't give you a network diff of 1.93T, either you're not mining bitcoins or your pool is lying to you.
That screenshot looks about like it's supposed to. I'm going to guess it's a "your hardware sucks" situation. What happens if you run at lower speeds? What hashrates are reported at 50, 75 and 100MHz?
That screenshot looks about like it's supposed to. I'm going to guess it's a "your hardware sucks" situation. What happens if you run at lower speeds? What hashrates are reported at 50, 75 and 100MHz?
I am not mining bitcoins, sorry
You should still try other pools to see it you get the same results.
January 05, 2018, 10:20:48 AM
And it has ben stable averaging around 3,4 GH/s for the last 12 hours. Do you still suggest that I should turn the potentiometer to 3 o'clock? And as a back-up check, what should it be at for 150 MHz and 1.5 A (or won't I be able to run it at that?
In post#1 is a table as an overview of the current related to frequency and voltage. If you turn your voltage to 1.26 V at 150 MHz it should run with 1.05 A. So that should be enough.Do you hav something to mesaure the voltage? On what position is the flat side of your voltage pot now?
January 05, 2018, 09:26:24 AM
If your pool doesn't give you a network diff of 1.93T, either you're not mining bitcoins or your pool is lying to you.
That screenshot looks about like it's supposed to. I'm going to guess it's a "your hardware sucks" situation. What happens if you run at lower speeds? What hashrates are reported at 50, 75 and 100MHz?
That screenshot looks about like it's supposed to. I'm going to guess it's a "your hardware sucks" situation. What happens if you run at lower speeds? What hashrates are reported at 50, 75 and 100MHz?
I did a test where I started it at 100 MHz and seemed to lose one third of the output. I presume that means that I got to contact the original seller and make a warranty claim?
Is the device getting really really hot? What is the ambient temp?
Is there a way to check the ambient temp?
January 05, 2018, 09:02:11 AM
I'd suspect your hub before I'd question the stick. Hence why I said "hardware" not "miner". What's your setup?
I'm running the stick on my "normal" rig since I also run my e-mail server out of it and let it mine when I'm afk. The stick was initially positioned in both USB 2.0 and USB 3.0 ports, but performed in about the same way. Since yesterday I moved it to a powered UH700 USB hub (max 5 A total, max 1.5 A per port). The stick is the only thing connected to the hub. This resulted in the GH/s being the same, but the stick not slowing down to a crawl over time.
As for the power supply, the hub is having an external power cable and is said to deliver 1.5 A on 3 charging ports. Additionally, it is the only thing plugged into the USB port at this moment.
This isn´t enough for higher frequencies. What is your voltage setting? The potentiometer at the right bottom corner on the backside has a flat side. Turn it to about 3 o´clock. Maybe 2 or 1 o`clock and see if the hashrate is getting stable. Use a frequency setting of 50 MHz for the tests. If it´s a power issue you sould at least get it running with this settings and a current of 1.5 A.My UH700 gives me 5 A at most with normal output on 4 ports and 1.5 A per charging port on 3 specific "charging ports". I thought the stick was supposed to work on that current.
And it has ben stable averaging around 3,4 GH/s for the last 12 hours. Do you still suggest that I should turn the potentiometer to 3 o'clock? And as a back-up check, what should it be at for 150 MHz and 1.5 A (or won't I be able to run it at that?
January 05, 2018, 05:42:47 AM
As for the power supply, the hub is having an external power cable and is said to deliver 1.5 A on 3 charging ports. Additionally, it is the only thing plugged into the USB port at this moment.
This isn´t enough for higher frequencies. What is your voltage setting? The potentiometer at the right bottom corner on the backside has a flat side. Turn it to about 3 o´clock. Maybe 2 or 1 o`clock and see if the hashrate is getting stable. Use a frequency setting of 50 MHz for the tests. If it´s a power issue you sould at least get it running with this settings and a current of 1.5 A. January 04, 2018, 07:59:51 PM
I'd suspect your hub before I'd question the stick. Hence why I said "hardware" not "miner". What's your setup?
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