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A modification of Christian Buchner's & Christian H.'s ccminer project by tsiv for Cryptonight mining.

July 5th 2014

Massive improvement to interactivity on Windows, should also further help with TDR issues. Introducing the --bfactor and --bsleep command line parameters allows for control over execution of the biggest resource hog of the algorithm. Use bfactor to determine how many parts the kernel is split into and bsleep to insert a short delay between the kernel launches. The defaults are no splitting / no sleep for Linux and split into 64 (bfactor 6) parts / sleep 100 microseconds between launches for Windows. These defaults seem to work wonders on my 750 Ti on Windows 7, once again you may want to tweak according to your environment.

June 30th 2014

I've keep getting asked for donation addresses, here are some for wallets that I currently have up. Will set up other wallets on request, in case you feel like donating but don't hold any of the currencies I currently have addresses for.

  • BTC: 1JHDKp59t1RhHFXsTw2UQpR3F9BBz3R3cs
  • DRK: XrHp267JNTVdw5P3dsBpqYfgTpWnzoESPQ
  • JPC: Jb9hFeBgakCXvM5u27rTZoYR9j13JGmuc2
  • VTC: VwYsZFPb6KMeWuP4voiS9H1kqxcU9kGbsw
  • XMR: 42uasNqYPnSaG3TwRtTeVbQ4aRY3n9jY6VXX3mfgerWt4ohDQLVaBPv3cYGKDXasTUVuLvhxetcuS16ynt85czQ48mbSrWX

In other news, I just yanked out the code for other alrogithms. This is now a cryptonight-only miner.

June 24th 2014

Initial release, compiles and runs on Linux and Windows. Documentation is scarce and probably will be, see README.txt and ccminer --help for the basics.

Before you read further (and you should), I highly recommend running Linux. There are some issues with running on Windows that are

Do note that the cryptonight kernel on this release is FAT and SLOW, and pretty much makes your Windows computer unusable while running. If you plan on running it on your primary desktop with only a single GPU... Well, just don't think you'll be using the computer for anything. I haven't tested it, but I'd expect it'll be fine if you have multiple GPUs on the system and you run the miner only on the cards that don't have a display attached. You'll still have the TDR issue to deal with though:

The kernel also tends to turn just long enough for Windows to think the GPU crashed and trigger the driver timeout detection and recovery. This is where the kernel launch option (-l) hopefully comes in.

The default launch is 40 tread blocks of 8 threads each. Don't know why, but at least my 750 Ti seems to like 8 thread blocks best. 40 blocks of 8 is something that, once again on my 750 ti, manages to run fast enough to finish before the Windows default 2 second timeout. Basically enables you to run the damn thing without the driver crashing instantly, which is why I made it the default. Since I only have that one single 750 Ti to test on Windows, I haven't got the slightest clue how it works on other GPUs. Your mileage may vary.

I peaked out my hashrate with 60 blocks of 8 threads, you'll just have to experiment with it until (if) you find the sweet spot for your cards. Do keep in mind that cryptonight needs 2 MB of memory for each hash, that would mean about 960 MB of GPU memory for the 8x60 config. Keep that and the amount of memory on your card in mind while playing around with the numbers.


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