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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…
Updated ccMiner Fork with Luffa512 Algorithm Support
29, Jul 2014
The ccMiner fork from djm34 (source) received another update that adds support for the Luffa512 algorithm used by crypto coins such as DoomCoin. A new coin that was recently announced as a CPU-only crypto, but is now also mineable by Nvidia GPUs and while there is still no GPU miner AMD rigs available, but one will most likely follow very soon as well. We have compiled a Windows binary from the latest source and have tried it out mining DoomCoin, on GeForce GTX 750 Ti we are getting a hashrate of about 55 MHS and on GeForce GTX 780 Ti the hashrate is about 90 MHS. You can download an try the windows binary of the miner from the link below, do note that this version of djm32’s ccMiner fork supports all of the previously released algorithms as well.
The windows binary available here is compiled for Compute 3.0, 3.5 and newer cards (32-bit version only) in a single binary, so it will not work on older cards. If you are unsure what version of Compute does your video card support check the included GPU Compute Capabilities List file. The binary is compiled with Visual Studio 2010 and is backwards compatible with Windows XP as well if you are using it on your mining rig.
Update: You might want to redownload the updated version of the miner from the link below as it brings significant performance improvement, the new hashrate you can get is about 80 MHs on GTX 750 Ti up from about 55 MHS and on GTX 780 Ti the performance is now about 120 MHS up from about 90 MHS.
– To download the updated ccMiner fork with Luffa512 algorithm support for Windows OS…
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Updated ccMiner Fork with Keccak Algorithm Support
26, Jul 2014
The ccMiner fork from djm34 got updated to add support for the Keccak algorithm used by crypto coins such as MaxCoin along with some performance improvement for the Whirlpool algorithms. the Keccak algorithm is already supported by CudaMiner, but since it hasn’t been updated for quite a while and ccMiner has become the GPU miner of preference for Nvidia miners you can now mine coins using this algo with it as well. In terms of performance improvement for the whirlpool algorithm, with the new version we are getting 4550 KHS on a GeForce GTX 750 Ti, up from about 4400 KHS that we got with the previous update. On a GeForce GTX 780 Ti the hashrate is up from about 11500 KHS to 13000 KHS using the new code.
The windows binary available here is compiled for Compute 3.0, 3.5 and newer cards (32-bit version only) in a single binary, so it will not work on older cards. If you are unsure what version of Compute does your video card support check the included GPU Compute Capabilities List file. The binary is compiled with Visual Studio 2010 and is backwards compatible with Windows XP as well if you are using it on your mining rig.