How to configure a Bitcoin miner?

Understanding Miner Configuration Fundamentals

1. Every Bitcoin miner requires explicit instruction on where to submit work, which algorithm to execute, and how to identify itself to the pool.

2. Default parameters in mining software rarely match real-world deployment needs—omitting even one critical flag often results in zero accepted shares.

3. The configuration process is not abstract; it directly maps to physical hardware behavior including GPU core clocks, memory bandwidth allocation, and thermal throttling thresholds.

4. Command-line arguments serve as immutable runtime contracts between the miner binary and external infrastructure like stratum servers and wallet backends.

5. Misconfigured identity parameters—such as incorrect worker names or malformed wallet addresses—lead to immediate rejection by pool authentication layers before any hash calculation occurs.

Essential Connection Parameters

1. --url defines the full stratum endpoint, including protocol prefix (e.g., stratum+tcp://) and port number, with no trailing slashes permitted.

2. --user must contain both wallet address and worker identifier separated by a dot, formatted exactly as the pool expects—case sensitivity matters for many SHA-256 pools.

3. --pass is frequently set to x for basic authentication but may require dynamic tokens or API keys depending on pool security policy.

4. --retry-pause controls reconnection delay after network failure, with values under 1 second risking aggressive TCP reset storms on unstable links.

5. --no-stratum-keepalive disables periodic ping frames, causing some legacy pools to drop idle connections within 90 seconds.

Hardware-Specific Tuning Flags

1. --gpu-fan accepts comma-separated fan speed percentages per GPU index, overriding BIOS defaults without requiring third-party utilities.

2. --gpu-pl sets power limit in watts per device, directly constraining TDP envelope and influencing sustained clock stability during long hashing cycles.

3. --intensity does not scale linearly with hash rate—it modulates memory access patterns and can trigger undervolting-induced instability if raised beyond silicon tolerance.

4. --cclock and --mclock operate independently; mismatched values cause PCIe bus saturation and rejected share submissions due to timing violations.

5. --devices filters visible GPUs at driver initialization level, preventing enumeration of physically present but thermally throttled units.

Logging and Remote Monitoring Setup

1. --log-path writes structured JSON-formatted diagnostics to disk, enabling automated parsing for uptime tracking and anomaly detection.

2. --api-port binds a local HTTP interface exposing real-time metrics including temperature deltas, rejected share reasons, and per-device hashrate variance.

3. --quiet suppresses console output but preserves all API and log-file emissions—essential for headless deployments managed via SSH tunnels.

4. --syslog routes messages to system-level logging daemons, allowing integration with centralized log aggregation platforms like ELK stacks.

5. --watchdog triggers automatic restarts only when the main thread hangs—not when individual GPU devices stall—avoiding cascading failures across multi-GPU rigs.

Frequently Asked Questions

Q: Can I use the same configuration file across different GPU models?A: No. Memory bandwidth requirements differ significantly between GDDR6X and GDDR5 architectures, making static intensity or mclock values unsafe without validation.

Q: Does changing --gpu-pl affect ASIC miner firmware behavior?A: No. ASIC miners ignore GPU-specific flags entirely; those parameters are parsed and discarded at startup without side effects.

Q: Why does --user accept alphanumeric characters but reject underscores in some pools?A: Pool-side regex validators vary—some enforce strict Base58Check wallet format rules while others apply relaxed ASCII filtering, leading to inconsistent underscore handling.

Q: Is --api-port accessible over public IP interfaces by default?A: No. The API binds exclusively to localhost unless explicitly overridden with --api-bind, preventing remote exposure without deliberate configuration changes.