Archive for the ‘General Info’ Category


The 5-chip Gridseed GC3355-based ASIC devices that support Dual Mining for Bitcoin and Litecoin are not that easy to be used in the Dual Mode, because you need to have two different software miners running at the same time. There is a bit of specifics in what and how you need to do in order to mine both BTC and LTC at the same time and after a bit of tinkering we have managed to finally make things work as they should under Windows. You need to download a special modified version of cpuminer for Scrypt (LTC) mining and a modified version of cgminer for SHA-256 (BTC) mining. We have compiled the two software miners and you will find the download links below. You will also need the Zadig software in order to replace the virtual USB to COM driver with WinUSB driver for the cgminer to detect and work with the BTC mining side of the ASICs.


– Download and run the latest version of Zadig
– From the Zadig interface select Options and choose List All Devices
– From the Dropdown list of devices select CP2102 USB to UART Bridge Controller and click on Replace Driver with the WinUSB driver selected
– If you have multiple 5-chip GC3355 DualMiner USB devices connected you may need to repeat the procedure for all of them
– Download, edit and run the BTC.bat file from the modified cgminer 3.8.5 for the Gridseed ASICs to start the miner working on BTC
– Download, edit and run LTC_ONLY.bat file from the modified cpuminer for Gridseed ASICs to start mining for LTC (check what your COM port is and edit it). You need to add the parameter “dual” (without the quotes and two dashes in front) to the command line in order for the Dual mode mining to start working

It seems that there are some ASIC devices that may be using different virtual USB to COM drivers other than the CP2102 that our unit has (for example ST32 Virtual COM Port), unfortunately we don’t have any of those to test with. You can however try to make things work by replacing the other driver with WinUSB, just select the right name from the dropdown box (do not try to rename drivers, it is pointless) and Replace it with WinUSB (you may need to unplug and plug the USB cable to the miner after that). If after installing the WinUSB driver over the virtual USB to COM driver the ASIC does not work with cgminer, you just need to uninstall the driver from the Device Manager and unplug/plug the USB cable to the device for it to install the original USB to COM driver and it should be functioning again with cpuminer (note that this way you may have it running on a new COM port).

This is it, you should have the miner running both SHA-256 (BTC) and Scrypt (LTC) mining withe the two software miners and the total power consumption should be about 60W. Note that you may need to lower the operating frequencies a bit for when mining the Dual BTC/LTC mode as the chips get hotter. If you want to mine only BTC you can stick only with running the modified cgminer, for LTC only you need the modified cpuminer without the dual option in the command line. The most attractive aspect of the Gridseed 5-chip GC3355 ASIC however remains their very low power consumption for Scrypt mining only mode, so think again if you really wan to run them in the Dual Mining more or for BTC only and not in LTC only mining mode instead.


Nowadays it is hard to always keep track on new promising coins and to jump on the train as early as possible in order to be able to mine more coins at low difficulty. Even if you do there is no guarantee that the new coin you have mined plenty of will be catch users attention and the exchange rate will skyrocket, so you will be able to make good profit. Another alternative is to look for changes in the top crypto currency market capitalization and jump on coins that have been available for a while, but that just recently started to rapidly increase in market capitalization.

For example the fairly new AuroraCoin that has been premined has managed to secure the third place in no time in terms of market capitalization, getting ahead of Litecoin. Dogecoin has fallen down to the 6th place and could continue to drop down in the list. Another new coin that has caught a lot of attention lately thanks to the AUR fame by being something similar as an idea is MazaCoin that has already secured the 17th place in terms of market cap. So if you have already missed the Auroracoin trading (Scrypt algorithm) and still haven’t checked the MazaCoin (SHA-256 algorithm) you still might have some time to mine a bit of MZC before the difficulty has skyrocketed, especially if you have a Bitcoin ASIC mining BTC at the moment.

If you want to be able to easily track what is going on in terms of crypto currency market capitalization, then you should keep an eye on the coinmarketcap website that has all the date you need in a simple and clean interface. Currently the website is tracking 146 crypto currencies and covers all of the major ones along with many of the new cryptos that are getting released and are not just a new pump and dump money making coins.

For more information about crypto market cap check the coinmarketcap website…


Bitmaintech, the company making 180 GHS AntMiner S1 BTC ASIC devices is still pretty much the only company that only sells units that are on stock and are shipped fast to you with express delivery. Currently the price of a single 180 GHS AntMiner S1 is 1.345 BTC directly from the maker and that includes the shipping costs too. But the question that arises is if these devices are worth investing in now with Terahash ASICs right around the corner? That is why we have decided to do a comparison between the 180 GHS AntMiner S1 ASIC and a cloud mining service as an alternative option and we have chosen the PB Mining Bitcoin cloud mining service. We choose that provides of cloud-based hashrate for mining BTC as they currently offer the most attractive price per GHS of just 0.0089 BTC per GHS.


We choose the PB Mining service for comparison as we have been using the service for a while already and it seems to be running smooth and without issues. Note that what you get there is a mining contract for 5 years, there is no exchange available where you can trade the purchased GHS. This long term contract is the reason why the price is much more attractive as when compared to or other similar services.

So what are the raw numbers:
– 180 GHS AntMiner S1 is 1.345 BTC
– 180 GHS Cloud Mining is 1.602 BTC

This you should however add some more to the price of the AntMiner S1 as you will need to buy a power supply for using the ASIC as there is none included. For a good 500W power supply that you will need you should add in about 0.1 BTC more, plus customs taxes for the ASIC as it is shipped from China that are going to be at least another 0.1 BTC and you get 1.545 BTC or a value that is already pretty close… With the current value in two-three days mining you will be able to cover the remaining difference and you may need to wait for about a week for your miner to arrive, and the cloud mining hashrate will start mining for you pretty much right away or in a few hours after you send the payment.

So it seems that the PB Mining cloud mining service seems an option that is not less attractive than purchasing an 180 GHS AntMiner S1 ASIC device. Of course there are other variables as well, like the fact that you can easily overclock the AntMiner S1 to about 200 GHS, but you will also have an extra cost for the power used by the device that will probably be covered by the extra hashrate achieved by overclocking the miner. So you really have an interesting cloud mining alternative than to purchase mining hardware, both will take pretty much the same time for you to break even before starting to make extra Bitcoins. The choice is yours, but you should consider the alternative options you have in the form of cloud mining instead of purchasing ASIC hardware directly from the manufacturer even if it will be shipped immediately to you.