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Posts Tagged ‘alexis78

We have received some requests for the fastest public fork of ccMiner for the Keccak algorithm and it seems that the version from alexis78 (source) is giving one of the best performances out there from the popular open source forks. There seems to be even more optimized version available as a private miner being sold, though we have not tested that one and cannot comment on the performance it offers. Alternatively the ccMiner fork from KlausT (source) also does seem to offer very similar performance as far as Keccak mining goes.

We have prepared a 64-bit Windows binary compiled from the alexis78’s source using CUDA 8.0 and compiled with VC 2013 that you can download and try if you want to mine Keccak on NiceHash or directly mine a specific crypto coin using this mining algorithm for its Proof of Work (PoW). The default intensity might be a bit high for some cards, so you might want to dial it down a bit if the miner is unstable on your mining rigs. If you are interested how much a GTX 1080 Ti does using this miner for Keccak, well it can do 1200-1300 MH/s with optimized settings for lower power usage. If you are wondering which altcoin is driving the demand and profitability for Keccak lately it is apparently SmartCash (SMART), prior to that there was also a short peak for MaxCoin (MAX) as well a couple of weeks ago.

To download and try the ccMiner 64-bit Windows binary for mining the Keccak algorithm…

The recent addition of the X11-Gost algorithm on NiceHash that is being used by SIBCoin (SIB) has increased the user interest in the coin and the algorithm as expected. NiceHash has recommended the use of the latest release of ccMiner by tpruvot for X11-Gost support on their servers, but it seems that this is not the fastest solution available to Nvidia miners as was pointed out to us. While ccminer v1.8.4 from tpruvot does about 8 MHs on a stock GTX 1070 GPU, but you can get faster speeds on the same hardware by using the latest ccMiner fork from alexis 78 (source). We have compiled a 64-bit Windows binary with Compute 5.x support and CUDA 7.5 for Nvidia Maxwell GPUs from the latest source for mining X11-Gost (SIBCoin) and with it you can get about 10-11 MHs on a stock GTX 1070 GPU.

Do note that on mining rigs with multiple GPUs you might need to increase the amount of virtual memory (SWAP file) if you have less system memory in order to be able to run the miner with the default high intensity. On a 6x GTX 1070 GPUs mining rig with 8GB RAM we’ve had to increase the virtual memory to 24GB in order to be able to run the miner properly at the default intensity of 22 set for the X11-Gost algorithm in the miner, otherwise the miner just crashes… 8GB RAM and 20GB SWAP file was not enough apparently.

To download the latest ccMiner Alexis 1.0 fork by alexis78 for Windows OS (64-bit)…

ccminer-1-7-1-alexis78

Alexis Provos has updated his fork of ccMiner (source) with improved performance for mining Vcash and Decred Blake256-based crypto coins and we have compiled a Windows binary to try it out. His latest release brings the same performance or even a slightly higher for Vcash (former Vanillacoin) as the specially optimized CUDA 6.5 Compute 3.5 release of ccMiner using the latest CUDA 7.5 and the Compute version supported by the specific GPU you have. The Decred (DCR) hashrate is also higher when compared to the latest tpruvot release that includes the optimizations submitted by pallas. Below you can find a quick comparison of the hashrate you can expect from this release on GTX 980 Ti, the archive below includes a 32-bit and 64-bit binaries compiled with CUDA 7.5 and VS2013 for Compute 2.0 – Compute 5.2 GPUs, though we have not tested how it handles on older GPUs.

Do note that the focus of the ccMiner fork from Alexis Provos is on the Blake256 algorithms and most specifically on Vcash and his release brings support for very few algorithms. There are some optimizations available for the other supported algorithms as well, so you might want to compare them as well in terms of performance. It is not a full ccMiner fork with support for all of the algorithms available in other releases, so with this one you can mine only the following algorithms:

– blake for Blake256-14rounds (SFR)
– decred for Blake256-14rounds (DCR)
– blakecoin for Blake256-8rounds (BLC)
– vcash for Blake256-8rounds (XVC)
– whirlpoolx for WhirlpoolX (old VNL algo)
– keccak for keccak256 (Maxcoin)
– lyra2 for LyraBar
– lyra2v2 for VertCoin

Since this fork is not based on the latest code by tpruvot there might be some bugs that have been resolved in the newer codebase of tpruvot’s ccMiner. We have observed something strange already, namely the very fast increase of the difficulty to a very high level on the Suprnova pool for Decred using Stratum over getwork, though it works just fine on YIIMP. In the end the difficulty issue appeared to be temporary and apparently something poolside and not related to the miner itself. Below you can find some performance comparison results using an Nvidia GTX 980 Ti GPU:

This release with GTX 980 Ti intensity 31 Decred, 30 Vcash
Vcash – 4453 MHS
Decred – 2394 MHS

1.7.4 alexis78 release Compute 3.5 CUDA 6.5
Vcash – 4418 MHS

Latest 1.7.6-git tpruvot with Pallas tweaks
Decred – 2218 MHS

To download the latest ccMiner version 1.7.1-git by alexis78 with improved performance for Windows OS…


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