: Controls the number of threads allocated to the algorithm. This value must be a multiple of the shaders on your GPU. Common values include 8192, 14208, or 22528.
: Ensure setx GPU_MAX_ALLOC_PERCENT 100 is written at the very top of your batch file, and restart your command prompt. 2. CGMiner Opens and Closes Instantly
CGMiner (short for "CPU GPU Miner") is an open-source mining software written in C. It is a multi-threaded, multi-pool tool designed for ASIC, FPGA, and GPU hardware. It features advanced capabilities like ATI GPU monitoring, overclocking, and fan speed control for both Bitcoin and derivative coins. : Controls the number of threads allocated to the algorithm
: Reduce the --intensity or lower the --gpu-engine clock speed. A healthy mining operation should show 0 hardware errors. 3. "No devices detected" or OpenCL Failures
CGMiner, originally developed by Con Kolivas, was designed as a versatile, open-source miner for Bitcoin. However, version 3.7.2 gained legendary status because it was the final version to officially support GPU mining for the Scrypt algorithm : Ensure setx GPU_MAX_ALLOC_PERCENT 100 is written at
Before you even download CGminer, you must prepare your Windows environment to ensure the software can access your GPUs correctly.
Use --thread-concurrency to optimize how the GPU handles tasks. This is specific to each card model. It is a multi-threaded, multi-pool tool designed for
Here is an advanced script tailored for a standard AMD Radeon HD 7950 / R9 280X card:
While Scrypt mining on GPUs is no longer profitable for major coins like Litecoin (due to massive ASIC farms), CGMiner 3.7.2 is still used for:
The performance of Scrypt mining depends heavily on exact parameters. Incorrect values will result in hardware errors (HW) or low hash rates. Sample Batch File Template
CGMiner is a command-line miner written in C. After version 3.7.2, the original developer (Con Kolivas) removed GPU support for Scrypt and SHA-256 to focus exclusively on ASIC hardware.