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When the new sgminer 5 develop version was updated to include the latest Neoscrypt OpenCL kernel from Wolf9466 a few days ago it has turned out that the latest performance optimizations do break compatibility with Nvidia cards as well as with the latest AMD video drivers. The solution was to use older AMD Radeon drivers to generate the kernel binary and them get back to the latest, but now there is an even easier workaround that was discovered by an user called insanid from the Feathercoin forum that does not require you to instal different drivers. All you have to do is to include the OpenCL libraries from an older driver such as 14.6 or 14.7 in the folder of the sgminer and the miner will generate properly the kernel binary file. Then you can either run sgminer for Neoscrypt with these DLL files in the folder or remove them and use the ones installed by the latest video drivers such as 14.9. To make it easier for you we have included the OpenCL DLL libraries in our windows binary compilation of the latest sgminer 5 development branch (source) and you can download the full package from the link below and try this workaround yourself.
– You can download the new sgminer 5 with the NeoScrypt fix for Windows OS here…
The ccMiner for Nvidia GPU mining for crypto coins is finally getting more like cgminer for AMD in terms of supported features thanks to developers like tpruvot. The more recent versions including the latest 1.4.9 of his ccMiner fork (source) have introduced features such as the ability to control the intensity of the GPU load, basic API functionality to get stats available to other software, support for JSON-based config file and now also nvapi/nvml support for GPU monitoring and possibly control. We have compiled a Windows binary from the latest source since there is still no official one released with the latest features and you can find a link to download it below. The binary is compiled with VS2013 and CUDA 6.5, however it includes support for Compute 3.0, Compute 3.5, Compute 5.0 and Compute 5.2 GPUs and not only for the new Maxwell-based cards. The latest version also does include some of the optimizations from SP’s ccMiner fork optimized for Maxwell, so you can expect to get similar performance on Maxwell cards such as GTX 750 Ti or GTX 970/980 with this release from tpruvot. The only thing that we still haven’t figured out is how to make GPU monitoring work as we are getting an error message saying that it i not available.
Update: There is now an official release of 1.4.9 available with some additional fixes and changes in the API, so you can download it directly from tpruvot’s Github repository, link below is updated to point to it.
– To download the latest ccMiner version 1.4.9 by tpruvot for Windows OS (CUDA 6.5)…
- Published in: Mining Software
- Related tags: ccminer, ccMiner 1.4.9, ccMiner 1.4.9 tpruvot, ccMiner 1.4.9 windows, ccMiner API, ccMiner config file, ccMiner CUDA 6.5, ccminer fork tpruvot, ccMiner GPU monitoring, ccminer GTX 750, ccminer GTX 750 Ti, ccminer GTX 970, ccminer GTX 980, ccminer maxwell, CUDA 6.5, tpruvot
The newest development version of sgminer 5 (source) now includes an updated kernel for the Neoscrypt crypto algorithm by Wolf9466 that increases the hashrate significantly from the previous release. There is a catch however, the new kernel does not work anymore on Nvidia GPUs, you need to use the previus release for these. Also it seems that the latest kernel optimizations break support for the latest 14.9 AMD drivers, at least on Windows, so you need to use an older driver version (14.6 or 14.7 for example) to generate the kernel binary and then update again to the latest driver for the maximum performance (much like with the older cgminer 3.7.7 fork with Neoscrypt). The new OpenCL kernel is designed to be used with Worksize of 64 for optimum performance and with it you should be able to achieve hashrate of up to about 200-250 KHS or even more with Radeon R9 280X GPU or up to abut 250-300 KHS for Radeon R9 290/290X. We have compiled a windows binary that includes the latest optimized kernel that you can download and try from the link below, if you try it out feel free to share your results from using it.
– You can download the new sgminer 5 with improved NeoScrypt hashrate for Windows OS here…