How to configure T-Rex Miner? (NVIDIA Best Settings)

Understanding T-Rex Miner Architecture

1. T-Rex Miner is a CUDA-based mining application designed exclusively for NVIDIA GPUs, leveraging the parallel processing power of modern graphics cards to solve cryptographic puzzles efficiently.

2. It supports multiple algorithms including Ethash, KawPow, Octopus, and BeamHash III, each requiring distinct memory access patterns and computational tuning.

3. The miner operates through a command-line interface where configuration parameters are passed either directly via arguments or loaded from a JSON configuration file.

4. GPU detection logic automatically identifies compatible devices but manual device indexing remains essential when managing heterogeneous setups with mixed generations like GTX 10-series and RTX 30-series cards.

5. Memory clock offsets and core clock adjustments are exposed only through external tools like MSI Afterburner, as T-Rex itself does not implement hardware-level overclocking controls.

Optimal Launch Parameters for Ethash Mining

1. Use --lhr-tune 75 on LHR-capable cards such as RTX 3060 Ti and RTX 3080 to stabilize hash rate without triggering lockout mechanisms.

2. Apply --gpu-init-mode 1 to ensure proper initialization sequence across multi-GPU rigs, preventing driver timeouts during startup.

3. Set --max-log-files 5 to limit log bloat while retaining sufficient diagnostic history for troubleshooting intermittent crashes.

4. Specify --dag-build-mode 1 to shift DAG generation workload from GPU VRAM to system RAM, reducing initial load time and avoiding VRAM exhaustion on 6GB cards.

5. Enable --temperature-limit 78 to enforce thermal throttling before critical thresholds are reached, preserving long-term silicon integrity.

Configuration File Structure and Syntax

1. A valid config.json must begin with an opening curly brace and end with a closing one, containing key-value pairs separated by commas.

2. The 'pools' array accepts multiple endpoints with failover support; each entry requires url, user, and optionally pass fields.

3. Device-specific settings reside under the 'devices' section, allowing per-GPU fan curves, memory tweaks, and algorithm overrides.

4. Logging behavior is controlled via 'log_file', 'log_level', and 'log_date' keys—values must match documented integer ranges.

5. Environment variables like %APPDATA% can be used in path definitions, enabling portable configurations across Windows installations.

Stability Testing and Benchmarking Workflow

1. Begin with default settings and run t-rex.exe -a ethash -o stratum+tcp://eth-eu1.nanopool.org:9999 -u WALLET_ADDRESS for five minutes to observe baseline stability.

2. Introduce --gpu-report-interval 30 to generate real-time stats every half-minute, capturing transient errors missed in standard output.

3. Monitor GPU-Util and Memory-Util via nvidia-smi during sustained operation to detect underutilization or memory bottlenecks.

4. Incrementally adjust --lhr-tune values in steps of 2 until hash rate plateaus or stale share count exceeds 3% over ten minutes.

5. Record results in CSV format using --json-response output redirected to a timestamped file for comparative analysis across sessions.

Frequently Asked Questions

Q: Does T-Rex Miner support dual-mining configurations?A: No, T-Rex does not implement native dual-mining functionality. It focuses on single-algorithm optimization and avoids splitting GPU resources across competing workloads.

Q: Can I use T-Rex Miner on Linux systems with headless NVIDIA drivers?A: Yes, T-Rex provides statically linked binaries for Ubuntu and CentOS distributions, requiring only properly installed nvidia-driver-525+ and cuda-toolkit-11.7 compatibility.

Q: Why does my RTX 4090 show lower than expected hashrate on KawPow?A: KawPow benefits more from high memory bandwidth than raw compute units. Ensure GDDR6X memory is running at rated speed and verify no XMP/EXPO profiles are interfering with PCIe link training.

Q: Is there a built-in watchdog process to restart T-Rex after crash detection?A: T-Rex lacks internal supervision. External solutions like systemd services on Linux or Windows Task Scheduler with “on failure” triggers are required for automatic recovery.