Posts Tagged ‘Grin

It is time for the next GRIN hardfork that is scheduled to happen tomorrow, January 16th on block 524160. The fork includes an algorithm change of the Cuckarood29 to the new Cuckaroom29, the other algorithm that Grin uses C31 will not be affected by the fork. So if you want to continue mining Grin after the fork with C29 you will need to update your mining software with support for the new Cuckaroom29 algorithm.

AMD GPU miners might want to check out the latest lolMiner 0.9.5.1 that has introduced support for Cuckaroom29 on AMD GPUs with 8GB video memory. Nvidia GPU miners might want to check out the latest GMiner 1.93 that also brought support for Cuckaroom29, but the developer fee is 3% for that algorithm at the moment. The latest GMiner also brings support for Cuckarood29v algorithm (MoneroV), though the dev fee there is a hefty 10%.

The latest update of the AMD OpenCL GPU miner lolMiner 0.9.2 brings some extra performance boost for the GRIN-AT31 (Cuckatoo 31 algorithm) on 8GB and 16GB video cards of up to +5% on AMD Polaris and AMD Vega GPUs and up to +10 on AMD Navi GPUs. The latest version also adds experimental support for GRIN-AT31 and Polaris, Vega and VII using AMD ROCm drivers under Linux. The lolMiner 0.9.2 has added range checks to GRIN-AT31 code for improved stability as well as added function to call external watchdog scripts in case a GPU fails during mining (if the miner detects no action of a GPU for at least a minute it will call the included reboot scripts).

Grin C31 lolMiner 0.9.2 expected hashrates:
– AMD Radeon VII (stock): 1.79 G/s
– AMD Radeon VII (1340/1000/0.825v, 130W): 1.37 G/s
– AMD Vega FE (stock): ~1.3 G/s
– AMD Vega 56 (1220/900/0.825v, 130W): 1.0 G/s
– AMD RX 5700 (Red Dragon, stock): 0.91 G/s
– AMD RX 580 8GB: 0.56 G/s

We remind you that lolMiner is a closed source OpenCL GPU miner available for Windows and Linux as pre-compiled binaries only and that there is a 1% developer fee for using the software for all supported algorithms. The miner should work on Nvidia GPUs with OpenCL, however stability and performance could be far from optimal, so it is best for use with AMD GPUs. For Nvidia GPU miner with support for Cuckatoo 31 you can check out the latest GMiner, NMBiner or some of the other option like BMiner etc.

To download and try the latest lolMiner 0.9.2 OpenCL miner for Windows or Linux…

The Grin project has already successfully hard forked once already earlier this year with a change in the C29 PoW algorithm from Cuckaroo29 to Cuckarood29 and now a second hard fork has been planned. Grin’s Hard Fork 2 is planned for block 524160 that should be reached sometime in January next year (around the middle of the month) with the testnet expected to fork a month earlier. Compatible versions of grin node, grin-wallet, and grin-miner will be versioned 3.0.0 or greater with the first releases of these are scheduled for December.

Grin remains true to its commitment to tweak CuckARoo as part of every network upgrade it does in order to discourage manufacturers from building specialized ASIC mining hardware for it, ASICs on the other hand are encouraged and being developed for the other algorithm C31 that Grin uses. As such, the currently used algorithm Cuckarood29 will be deprecated for a new algorithm called Cuckaroom. This means that if you want to be able to continue mining Grin with the C29 algorithm after mid-January next year after the fork happens you would need to update your miner software to support the new algorithm. The first beta binaries of the software should be available in the next couple of days along with details about the new algorithm, so miner software developers will have enough time to integrate the required changes for the new algorithm by the time the hard fork executes.


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