Posts Tagged ‘neoscrypt nvidia miner

sgminer-5-dev-neoscrypt-windows

The latest development version of sgminer 5 (source) now also includes support for the Neoscrypt crypto algorithm for mining FTC and other crypto currencies relying on it. The OpenCL kernel included is the optimized version also available in the cgminer 3.7.8 with Neoscrypt that offers better performance and supports the latest AMD drivers version 14.9 (thanks to Wolf9466 Neoscrypt kernel improvements). We have compiled a windows binary and you can download it below to try it out, however it seems that the performance we get with this version of sgminer is a bit lower than with the dedicated fork of cgminer 3.7.8 on AMD Radeon R9 280X, the performance on Nvidia GPUs is the same. There is still no CUDA miner for Nvidia GPUS with Neoscrypt support, so if you want to mine Feathercoin with Nvidia-based GPUS such as GTX 750 or GTX 970/980 you need to use one of the OpenCL miners.

You can download the sgminer 5 dev with NeoScrypt support for Windows OS here…

cgminer-3-7-8-neoscrypt-windows

There is an update of the official cgminer with Neoscrypt support to version 3.7.8 that adds new kernel with better performance and make the miner work with the latest AMD drivers 14.9, something that was not working with the older 3.7.7b miner. We have compiled a windows binary of the new cgminer 3.7.8 Neoscrypt (source) that you can download from the link below and try. Our first test on a AMD Radeon R9 280X without overclock has shown a performance of about 140 KHS, so about 50 percent increase from the older version and some people report going close to 200 with overclocked cards. Since there is still no CUDA miner for Neoscrypt available you can use this cgminer with OpenCL on Nvidia-based GPUs as well, though on Nvidia you are probably not going to see much of an improvement over the previous version of the miner.

You can download the cgminer 3.7.8 with NeoScrypt support for Windows OS here…

neoscrypt-gtx-750-ti-opencl

Feathercoin (FTC) has hard forked from the Scrypt algorithm to the NeoScrypt as was announced earlier this year after block 432000. You need to update your wallet to Feathercoin 0.8.7.0 in order to continue using it after the NeoScrypt update and you need to download a special version of cgminer with support for the NeoScrypt algorithm (link below). The goal of the hard fork away from the Scrypt algorithm is to make FTC not mineable with Scrypt ASIC miners giving back the opportunity to GPU miners to mine the coin. Currently the profitability of mining FTC is quite high compared to other coins that are being mined with GPUs, so there is high interest in Feathercoin at the moment. Do note that here is no special miner dedicated for Nvidia miners to mine NeoScrypt using CUDA, however the version of the cgminer with NeoScrypt support actually works quite well not only on AMD, but on Nvidia GPUs as well using OpenCL. The screenshot above is from a GeForce GTX 750 Ti video card at stock frequencies giving a bit over 40 KHS and with some overclock you should be able to push the performance of a single GTX 750 to about 50 KH/S.

Mining with cgminer 3.7.7B with NeoScrypt support (source) on AMD GPUs has something that you make sure to do to get the best performance out of your GPUs. You need to make sure you have Catalyst drivers 13.11 installed, and then run the cgminer to compile the kernel with the settings you are using, then update to the latest 14.9 drivers and run the miner with the already generated kernel (BIN) file with the old drivers. Make sure you don’t change settings affecting the kernel after getting back to the latest video drivers as this will invoke the compilation of a new kernel that will not work and you will most likely be getting HW errors only. Generating kernel with newer drivers and not using a kernel generated with the older 13.11 drivers will not work and you will be getting only hardware errors instead of actual work being done. This is a bit of inconvenience, but you will have to do the driver trick only once and hopefully there will be a fix for this in the future as well as further performance improvements. Currently we are getting about 90-100 KH/s on a single AMD Radeon R9 280X GPU, so the performance on Nvidia graphics cards compared to AMD is looking very nice considering that we are using OpenCL and not CUDA.

You can download the cgminer 3.7.7b with NeoScrypt support for Windows OS here…


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