I have also tested in a Virtual Machine with Linux, and I got the same problem, but in this case, I don't know if it´s valid for a Vmware Virtual Machine!

I haven't checked the voltage, but I´m always changing it when I change the frequency.
I can't say either the version of mine, where do I check that? I have build my own using a Linux

So I did, running 2 sticks in different cgminers at 250mhz for more than 14 hours without a break, it´s definitely the solution. No problem here.

So my guess it´s the 2 pack stick going zombie or off, it´s a matter of driver or cgminer bug!

It´s definitely not a problem with the hub!

I have the same here, when they go zombie, I quit and than restart and it works again, some times I have to turnoff the hub and turn on again.

I just have tried with 100 mhz, and the problem persists!
I'll try running different cgminer for each stick!

And actually I can run each one at 250mhz! working with no hardware errors!

Well if this is an issue with power of the hub lowering the frequency should fix the problem! I'll try lowering the frequency and check. But it looks like my problem is the same as yours!

I can ran 1 stick on the hub with 300mhz, but I can't run 2 sticks with more than 225mhz

I know this issues was already reported in here, but I haven't seen any answer!
So , I got 2 sticks running on a USB powered hub (48w).

The sticks are running fine at 200mhz, but after some time, the stick number 2 goes zombie!

Has anyone found a solution?

is it possible to specify different frequency for each device?

Example 2 devices (2pac bm1384) 1 wtih 230 and another with 300 mhz on the same pool with same worker?

Does anyone got more than 300mhz on the stick?

Is it possible?

Let me do a newbie question, please sorry if it's a too dumb question.

Would it be possible to change the firmware ( or something else ) of the 2Pac GekkoScience to mine with a different algorithm? Like Scrypt?

Hi, just to clarify! You have 3 Sticks, 2 are working in the same Computer and with the same Cgminer (VH's) version, but 1 stick is not working? is that so?

I Think this usually means that in sometime there was not enough power to run them, so they  went zombies. Try lowering frequency in 10 or 20 mhz, and lower just a little bit the VCore, and see what´s happen.

Actually you made me think that in my house, I have a really unstable power source, it usually loose power in a flash moment, these kind of thing would make the sticks goes into zombie mode!

HW error are near 0, and invalid share next round was 0% of 1,298 valids.
Maybe I have lucky ith this notebook, On my PC, I can't run nothing more than 100 mhz!


(Actually I tried to post an image)

  So I just have a entire night mining with my 2pac BM1384, it works great.

I would like to ask, I´m running it at 260mhz (havn't measured the voltage, but is as low as it can be) The stick is pluged into my Notebook USB Port, does that means that my notebook usb port can deliver around 2A?
Isn't that too much for a non powered USB Hub?


Another question is, what's the ideal temperature of it? I'm measuring around 50º Celcius(at the dissipator) with my home made Computer Fan

Hum it´s nice, I havn't found this brand before, seems pretty good.
But for the price range, I think the Orico 20 Ports 300 Watts it´s a best deal: https://www.aliexpress.com/item/ORICO-30-Ports-Industrial-USB2-0-Hub-for-TF-SD-U-disk-Data-Test-Batch-Copy/32812709736.html

I Was Wondering, a 10 Ports hub like this: http://www.orico.cc/goods.php?id=6225
With a 12V3A power, this mean a 36Watts, How this Watts are distributted to ports?

36Watts means 7.2A in a 5V, but are each port limited to an Amperage? or if you connect 3 ports only, those Amperes will be splited into these 3 ports?

Hi Guys, How about this Orico Usb3.0 60w  5A Usb Hub with 13 ports?
https://www.aliexpress.com/item/ORICO-60W-12-Ports-USB-3-0-Hub-including-3-BC1-2-Charging-Port-and-4/32774929010.html

I´m planing to connect 3 sticks(2 pac BM1384) and a USB Fan.

Also for me, living in Brazil, it´s easier to buy in aliexpress than amazon (they don´t ship to Brasil most of products)

Thanks a Lot, It´s working now, I have compiled the VH's Cgminer, it works fine. I managed to compile it for windows and it´s working either, with the excpetion that in my PC I can´t manage to get it working with more than 100MHZ, might be some low power USB problem.


Thanks a lot, probably I´ll get rid of this hub shit I have, it´s a non expensive shit! Good setup , I´ll be looking into that thread to more info of next USB HUB I will be buying!

1) Hi Guys, I have a shit HUB, powered with 3A (at least in specifications), when I plug my Gekko directly in notebook port, I can mine at 200 mhz fine, but when I plug into that Hub, it even don´t start to Mine. Can I throw it away?

2) Another question, is it preferable a 3.0 USB hub or a 2.0 USB Hub?

Hello, I need help! I Just bought a GekkoScience Compac BM1384, but I´m facing a lot of problems.


Let´s start saying it doesn't work under Windows 10, both with CGminer or BFGminer. For otherwise CGminer worked few times in windows. (Cgminer 4.9 built by Novak)

Well, Under Linux I got it working in my notebook (Direct Connected to USB Port) (Build my own 4.10 Version). But it haves a really low Hash Rate compared to others people report. I´m reaching an AVG 500 MH/s
Now, the strange thing, BFGMiner won´t work on linux even by adding -S compac:/dev/ttyUSB0 which points to my Miner, but this command actually make my miner flash the blue led all the time, which means it´s point to the right place, now the funny thing, if I mess around with the voltage screw (to be more precisely, when I set it to the point between 0.5V and 0.9, I mean, this is the point where nothing is set) while bfgminer is ruinng, it does start mining!

Ok now the hash rate under BFGminer is much bigger, it´s under an AVG of 5 Gh/s, some times it reachs 11 Gh/s and even 20 GH/s. But also it does a lot of heat, (Measured 75º Celcius or 167 ºF)

I´ve tried to connect a USB powered HUB, with less success  than before, Both CGMiner or BFGMiner won't recognize it unde Linux or Windows.

I´m facing Hardware problems?