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Christian Buchner, the author of the CudaMiner software for mining popular alternative crypto currencies on Nvidia-based GPUs has just released another software called CCminer that is intended to support CUDA GPU mining for Heavycoin (HVC) and Fuguecoin (FC). The GPU miner for Nvidia seems to be offering better performance than the recently released AMD GPU miner for HVC. We have compiled a x86/x64 windows binary from the source code with Compute 3.5 capability and with Visual Studio 2012 (if you are getting errors when running about missing Dll file you may need to download and install Visual C++ Redistributable for Visual Studio 2012).
The performance we are getting on a GeForce GTX 750 Ti card with no overclock is about 4 MHS (4000 KHS) and on a GeForce GTX 780 Ti we get about 10.5 MHS (10500 KHS) with no overclock and raised power limiter to 106%. So if you have a few Nvidia-based GPUs you might want to try mining Heavycoin for a bit with them while the HVC exchange rate is still decent and with some AMD GPU miners getting away from HVC mining. In our experience the 64-bit version of the miner does give less shale shares (less booos) as compared to the x86 binary, though not much difference in performance in terms of hashrate between the two.
– Download the CCminer Nvidia GPU Miner with HEFTY1 and Fugu256 Support for Windows…
- In: Mining Software
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It seems that the community has figured out a way to do a voltage mod for the Gridseed 5-chip ASICs that allows for higher overclock frequencies and thus even higher hashrate. We have decided to try out the mod ourselves and report our own findings and results with our older and newer dual mining mode ASIC devices from Gridseed. What you need to do in terms of hardware modification to your miner is to solder a bridge on the place marked with the green line on the photo above. Then you need to run the latest version of the modified cgminer for Gridseed with an extra option for the gridseed options line “voltage=1”. Note that the space where you need to solder a bridge is very small, it is designed for SMD resistors and if you are not experienced with a soldering iron you will have trouble performing this modification by yourself. Also if you are not very careful you may damage the device by soldering something that should not be soldered and thus shorting the ASIC, so be very careful should you decide to mod the device or higher voltage!
After performing the hardware modification to our two miners that are from different revisions apparently we have tried running them with the modified cgminer (download link for the windows binary below, for the source). The older revision of the device we’ve got with CP2102 USB to UART Bridge Controller trying to run the setting to set the higher voltage from within cgminer returns an error about the firmware not supported. The device has a firmware version 01140116 and apparently this version is not supported, even modifying the cgminer to recognize it as supported firmware did not help in being able to overvolt and overclock the miner. The other newer ASIC device with STM32 Virtual COM port driver was with the correct firmware version 01140113 and the miner apparently did activate the overclock and overvolt mode. The power consumption of the device we have measure with the voltmod and running at 950 MHz frequency was with about 2W higher than at 850 without the voltmod, or with other words 8W instead of 6W (in fanless mode) with 2W more with the fan working (10W and 8W respectively). If you are doing the voltmod however we would not recommend to use the device in passive fanless cooling mode, though at 850 MHz and with no voltmod we have been running a single miner for already 48 hours without any issues.
With the increased voltage of the Gridchip GC3355 processors we were able to get from 850 MHz with no or very few HW errors (361 KHS) to 950 MHz with no to very little HW errors (404 KHS) after the modification. We could also go to about 425 KHS at 1000 MHz with very few HW errors, going up to 1050 MHz produces almost 450 KHS, however the number of HW errors we are getting at that frequency is significant, so the real performance is probably much lower than at lower clock speeds. What we would recommend as the most stable result is to go to 950 MHz as overclock frequency as good starting point after doing the voltmod and go up in 50 MHz steps to see how will your miners perform at higher frequencies and if they will do any better results. The latest version of cgminer supports overclock up to 1300 MHz in 50 MHz steps, so you can go pretty high, though you should be careful as the increased voltage and frequency might lead to damage of the device.
– You can download cgminer 3.7.2 for Scrypt mining on Gridseed 5-chip GC3355 ASICs on Windows OS here…
- In: Mining Hardware|Tests and Reviews
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Now, more than a day since the release of a GPU miner for AMD graphics for mining the previously announced as CPU only crypto Heavycoin (HVC) is available, surprisingly the price of the crypto is still at high levels. The release of GPU miner already made the mining of the coin with CPU pointless, and the coin is already not so easily mineable with GPUs with the network hashrate already pretty high. Mining HVC with AMD GPUs however may be worthwhile for some more time if you have some AMD Radeon cards to spare if the exchange rate does not start to drop. We still haven’t gotten a release of a HVC miner for Nvidia that uses CUDA, but the author of CudaMiner is working on such software. The interest in Heavycoin is still quite high and you should not be dismissing it so easily.
– For more information about the Heavycoin (HVC) HEFTY1 based cryptocoin…
- In: General Info
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