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Updated cgminer 3.7.2 and cpuminer for Overclocking Gridseed 5-chip GC3355 ASICs

1, Apr 2014

cgminer-updated-version-for-overclocking

We have updated our windows builds of the cgminer 3.7.2 and cpuminer for Gridseed 5-chip GC3355 ASICs and you can download them below. Both versions include the latest official releases (cgminer source and cpuminer source) and in the source folder you can find our modified files for adding additional frequencies for overclocking if you want to compile from the source code yourself.

Both the cgminer 3.7.2 and cpuminer with Gridseed 5-chip GC3355 ASIC support the following frequencies that you can set to find what works best for overclocking the devices you have:

250, 400, 450, 500, 550, 600, 650, 700, 706, 713, 719, 725, 731, 738, 744, 750, 756, 763, 769, 775, 781, 788, 794, 800, 813, 825, 838, 850, 863, 875, 888, 900, 913, 925, 938, 950, 963, 975, 988, 1000, 1013, 1025, 1038, 1050, 1063, 1075, 1088, 1100, 1113, 1125, 1138, 1150, 1163, 1175, 1188, 1200, 1213, 1225, 1238, 1250, 1263, 1275, 1288, 1300, 1313, 1325, 1338, 1350, 1363, 1375, 1388, 1400.

– You can download the latest cgminer 3.7.2 ALT for Gridseed ASICs on Windows OS here…
– You can download the latest cpuminer for the 5-chip GC3355 ASICs for Windows OS here…

Updated cgminer 3.7.2 with Support for Gridseed 5-chip and 80-chip GC3355 ASICs

12, Apr 2014

cgminer-gridseed-updated-release-g-blade

We have updated our windows build of the cgminer 3.7.2 with support for Gridseed 5-chip GC3355 ASICs to properly support the new 80-chip Gridseed G-Blade miners, this release is based on the (girnyau source) with the fix for more than 8 chips (up to 256) from dbartle’s version. Previous releases did not properly reported the local hashrate of the new Gridseed G-Blade miners that consist of two 40-chip PCBs, though they were working just fine with the hardware and poolside everything was Ok. Now if you set the chips value from 5 to 40 in the BAT file for running the cgminer you should be seeing the correct local hashrate for the G-Blade, it should work just fine though we haven’t been able to test it as we do not yet have a G-Blade in our hands. Other than that the updated version is compiled and packaged with the latest OpenSSL libraries with a fix for the the Heartbleed bug. You can download the windows binary below and the source folder contains the files modified from the original source should you want to compile it yourself. Check the Readme file for more information on the list of supported frequencies and how to set individual frequencies per device for overclocking your Gridseed ASIC miners.

– You can download the latest cgminer 3.7.2 with Gridseed ASICs support on Windows OS here…

Updated Guide on How to Mine Both BTC and LTC on Gridseed 5-chip GC3355 ASIC

22, Mar 2014

gridseed-dualmining-working-update

When we’ve made our previous guide for dual mining BTC and LTC on a Gridseed 5-chip GC3355 ASIC we’ve only had an earlier revision of the miner that used CP2102 USB to UART Bridge Controller. Now that we already have a newer revision with the STMicroelectronics Virtual COM Port we have decided to update the guide with information on how to Dualmine on these ASIC devices. Note that we do not recommend using these devices for dual mining mode, but for Scrypt only mode instead, but you are free to decide for yourself. The advantages of using Scrypt only mode are the low power consumption and heat, the ability to overclock higher, including with a voltage modification and a choice of multiple more up to date software miners. Note that the only way for the moment to use the Dual Mining mode on the Gridseed 5-chip GC3355 ASIC devices is to use the special version of cgminer 3.8.5 for BTC mining (SHA-256) along with the special modified version of cpuminer for Gridseed for LTC mining. Due to the way that the Dual Mining mode is realized on these ASICs using a more recent version of cgminer or bfgminer for LTC (Scrypt) mining on these devices along with the cgminer for BTC mining is not possible at the moment.

gridseed-driver-com-port-number

– Open up Windows Device Manager and go to the Ports (COM & LPT) and note the COM port that is written behind the STMicroelectronics Virtual COM Port driver
– 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 STM32 Virtual COM Port and click on Replace Driver with the WinUSB driver selected
– Download the dualmining package that we have prepared for windows that contains cgminer 3.8.5 for BTC mining and cpuminer for LTC mining
– Edit the BAT files for the two software miners included in the archive with your settings for BTC and LTC mining pools
– In the LTC-START.bat file you will see an option “gc3355=\\.\COM4”, here you need to change the COM port number to the one you have seen in the device manager before updating the driver with Zadig to use WinUSB
– First you need to start cgminer 3.8.5 for BTC mining, wait a few seconds until the software starts up and connects to the pool and starts working
– Then start the cpuminer for LTC mining, note that you will need to wait for some more time here before the miner connects and starts working, but it it takes more than a minute maybe something is not right

If you still haven’t used cpuminer for Gridseed you should know that the software does not report local hashrate, so the zeroes you see are normal, it is actually working and sending shares. Also note that when in Dual Mining mode you will not be able to overclock the device as high as when only in Scrypt mining mode, so it is normal to be getting lower hasrate. As we’ve already said, we do not recommend the Dual Mining mode and suggest to use these ASIC devices for Scrypt mining mode only, especially if you want to run multiple devices.

– Download the DualMining package for BTC/LTC mining on Gridseed 5-chip GC3355 ASIC for Windows…


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