Posts Tagged ‘CUDA 6.5


After a crowdfunding effort to accumulate 2.5 BTC from users DJM34 has released a faster open source NeoScrypt kernel (source). Apart from the NeoScrypt the rest is based on the latest ccMiner form from SP version 1.5.78 that uses CUDA 7.5, so it is pretty much useful only if you are mining NeoScrypt-based altcoin. We have compiled a Windows 32-bit binary of the new ccminer djm34 neoscrypt fork with faster NeoScrypt using VS2013 and CUDA 7.5 as well as CUDA 6.5 (two versions available), compatible only with Nvidia Maxwell GPUs (Compute 5.0 and 5.2). Below we have compared the Neoscrypt performance using GTX 970 of this new release with the ccMiner 1.5.74 from SP with CUDA 6.5 and ccMiner 1.5.78 from sp with CUDA 7.5 to see what is the performance gain. Note that the initial ccMiner releases from SP with CUDA 7.5 had brought a significant drop in performance in the NeoScrypt algorithm, so it was best to use 1.5.74 with CUDA 6.5 for NeoScrypt.

NeoScrypt GTX 970 hashrate performance:
– ccMiner 1.5.74 CUDA 6.5 SPMOD fork: 525 KHS
– ccMiner 1.5.78 CUDA 7.5 SPMOD fork: 275 KHS
– ccMiner djm34 neoscrypt 6.5 from djm34: 632 KHS
– ccMiner djm34 neoscrypt 7.5 from djm34: 611 KHS

Note that the comparison with 1.5.78 is with an earlier release that did not include the latest NeoScrypt kernel from djm34, because it seems that SP has integrated it in the latest GitHub code after the code has been released by djm34.

To download the new ccMiner for Maxwell with faster NeosCrypt by DJM34 for Windows OS…


The ccMiner SPMOD fork for Nvidia Maxwell GPUs (source) has recently been migrated to use the newer CUDA 7.5 from the older CUDA 6.5. The latest version with CUDA 6.5 support was version ccMiner 1.5.74 and the latest version is ccMiner 1.5.78 that already uses CUDA 7.5. The first release with CUDA 7.5 had not so good performance and was slower in some algorithms in terms of performance as compared to the latest CUDA 6.5 release, but the latest code has been optimized to offer similar or even better hashrate in most supported algorithms. We took an Nvidia GeForce GTX 970 (Gigabyte GV-N970WF3OC-4GD) running at stock frequencies for a spin with some of the currently popular algorithms to compare the performance of the latest CUDA 6.5 to the latest CUDA 7.5 release of ccMiner spmod. The results in the table clearly show that aside from NeoScrypt the latest CUDA 7.5 release offers very similar or even slightly better hashrate compared to the latest CUDA 6.5 version. The hashrate of X13, X15 and Qubit is still slightly slower, but not much. So unless you are mining NeoScrypt you should have no reasons not to upgrade to the newer CUDA 7.5 releases and soon we are probably going to see even better performance thanks to further optimizations of the code. Do note however that some other Maxwell GPUs might have some more variance in terms of performance difference between the two compared versions.


New year and a new update in the form of a freshly compiled Windows binary from the latest ccminer 1.7.1-dev (source). The latest updates include some small bug fixes as well as the addition of the GPU mining support for the sib algorithm (X11 + Russian Streebog-512/GOST). The tpruvot fork of ccMiner is compatible with older Nvidia GPUs, so this is the version to go for if you have older video card that you want to try mining cryptocurrencies with. This Windows binary is compiled with VS2013 and CUDA 6.5 and supports Compute 2.1, 3.0, 5.0 and 5.2 GPUs, however have in mind that not all of the supported algorithms may work on older Compute 2.1/3.0 GPUs, but you can at least try with it.

To download the latest ccMiner version 1.7.1-dev by tpruvot with various improvements for Windows OS…