Okay so I have done my research, I have practically tried everything. It just frustrates me because mining LTC was a piece of cake but I can't seem to figure out how to mine bitcoins which this device says it can do bitcoins plus dual mining.

I have tried BFGminer but it seems not to detect my gridseed unless I am mining LTC. Then I tried CPUMiner and it works except it gets invalid all the time its like its using the wrong algorithm but I tried the -a sha256d and still produces the same issue. Can somebody help me I have the drivers installed and my usb Gridseed miner is on COM6. I have also tried CGMiner and it says cannot detect any USB devices.

I have tried every possible thing that comes up on the first few Google Results. I am not exactly new to mining as I have done Scrypt mining fine with this device.

Here is the product.

  • Is there any sort of an error message printed when you try to mine, or are your shares rejected?
    – morsecoder
    Mar 24, 2015 at 4:37
  • For cpuminer it just rejects shares, I am not talking a few but all of them. For BFGMiner it doesn't detect it but I think BFGMiner doesn't support Gridseeds for mining BTC. Mar 24, 2015 at 22:48

1 Answer 1


I found this link apparently cgminer doesn't like usb3 according to the forum post don't know why I thought usb3 is backwards compatiable. But I tried thinking this is bull but it worked.

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