Kaspa mining overclock settings

Understanding Kaspa Mining and GPU Optimization

Kaspa mining leverages the kHeavyHash algorithm, which is a memory-intensive and bandwidth-dependent proof-of-work function optimized for GPU mining. Unlike traditional mining algorithms such as SHA-256 or Ethash, kHeavyHash benefits significantly from high memory bandwidth and low latency, making GPU overclocking a critical factor in maximizing hashrate and efficiency. The primary goal of overclocking settings in Kaspa mining is to balance memory clock, core clock, and voltage to achieve the highest possible MH/s without causing instability or excessive power draw.

The most commonly used GPUs for Kaspa mining include NVIDIA RTX 3060 Ti, RTX 3070, RTX 3080, and AMD Radeon RX 6700 XT. Each of these cards responds differently to overclocking, and settings must be tailored based on the specific model and cooling solution. The process begins with using mining software such as GMiner, T-Rex, or Kaspa Miner, all of which support tuning parameters for kHeavyHash.

Key Overclocking Parameters for Kaspa Mining

When adjusting overclock settings for Kaspa mining, focus on three main components: memory clock, core clock, and power limit. These settings are typically adjusted through tools like MSI Afterburner for NVIDIA cards or AMD Radeon Software for AMD GPUs.

• Memory Clock: This is the most critical setting for Kaspa mining. Increasing the memory clock directly improves memory bandwidth, which is essential for kHeavyHash performance. Most NVIDIA cards can safely run +1000 MHz to +1400 MHz memory offset. For example, a GDDR6X-equipped RTX 3080 may achieve optimal results at +1200 MHz.
• Core Clock: Lowering the core clock can reduce power consumption and heat without significantly impacting hashrate, as kHeavyHash is not heavily dependent on core performance. A reduction of -200 MHz to -300 MHz is common.
• Power Limit: Reducing the power limit to 70–80% helps improve efficiency (MH/W) and reduces thermal output. This is especially effective when paired with a lowered core clock.
• Voltage: On NVIDIA cards, undervolting the core can enhance stability. Setting a custom voltage curve in MSI Afterburner allows for lower voltage at lower core clocks, improving energy efficiency.

These adjustments must be tested incrementally to avoid crashes or artifacts.

Step-by-Step Guide to Apply Overclock Settings

To configure overclocking settings for Kaspa mining, follow this detailed procedure using MSI Afterburner and GMiner:

• Download and install MSI Afterburner and RivaTuner Statistics Server (RTSS).
• Launch MSI Afterburner and ensure 'Unlock voltage control', 'Unlock voltage monitoring', and 'Enable low-level access mode' are checked.
• Start with default settings and launch your mining software to establish a baseline hashrate.
• Gradually increase the memory clock slider by +100 MHz increments. After each adjustment, run the miner for 5–10 minutes to check for stability.
• If the system remains stable, continue increasing the memory clock until you observe crashes, artifacts, or rejected shares.
• Once instability occurs, reduce the memory offset by 100 MHz to find the sweet spot.
• Adjust the core clock downward by -200 MHz and monitor the hashrate impact. Further reduce if power draw is too high.
• Lower the power limit slider to 75% and observe temperature and stability.
• Use the voltage curve editor to create a flat, low-voltage profile for the core, reducing energy use without sacrificing stability.
• Save the profile in MSI Afterburner and set it to apply on startup.

Repeat this process for each GPU in a multi-GPU rig, ensuring consistent settings across all cards.

Monitoring and Fine-Tuning Performance

After applying overclock settings, continuous monitoring is essential to ensure stability and efficiency. Tools like HWInfo64, GPU-Z, or the built-in dashboard in T-Rex Miner provide real-time data on temperature, fan speed, power draw, and hashrate.

• Keep GPU temperature below 70°C under load to prevent thermal throttling.
• Monitor memory junction temperature on NVIDIA cards; values above 100°C may indicate inadequate cooling.
• Check for rejected shares or stale submissions in the mining software log, which suggest instability.
• Use fan curves to maintain optimal cooling. A custom fan curve that ramps up to 70% speed at 60°C helps balance noise and cooling.

If the hashrate drops unexpectedly, revert to the previous stable setting and retest. Small adjustments in voltage or power limit can resolve intermittent issues without sacrificing performance.

Recommended Overclock Settings by GPU Model

Different GPUs achieve optimal performance with unique configurations. Below are tested settings for popular models:

• NVIDIA RTX 3060 Ti (GDDR6):

  • Memory: +1100 MHz
  • Core: -250 MHz
  • Power Limit: 75%
  • Expected Hashrate: 3.7 – 3.9 GH/s

• NVIDIA RTX 3080 (10 GB GDDR6X):

  • Memory: +1200 MHz
  • Core: -300 MHz
  • Power Limit: 80%
  • Expected Hashrate: 5.8 – 6.2 GH/s

• AMD Radeon RX 6700 XT:

  • Memory Clock: +1000 MHz
  • Game Clock: -50 MHz
  • Voltage: 950 mV
  • Power Limit: 85%
  • Expected Hashrate: 4.5 – 4.8 GH/s

• NVIDIA RTX 3070:

  • Memory: +1000 MHz
  • Core: -200 MHz
  • Power Limit: 70%
  • Expected Hashrate: 4.2 – 4.4 GH/s

These values serve as starting points. Individual card variance means results may differ, requiring minor adjustments.

Frequently Asked Questions

What is the best mining software for Kaspa with overclocking support?GMiner and T-Rex Miner are widely used due to their excellent kHeavyHash optimization and real-time tuning capabilities. Both allow dynamic clock adjustments and provide detailed performance logging, making them ideal for fine-tuning overclocked GPUs.

Can overclocking damage my GPU during Kaspa mining?While overclocking increases stress on components, modern GPUs have built-in safety mechanisms. As long as temperatures remain within safe limits and settings are applied gradually, the risk of damage is low. Avoid excessive voltage increases and ensure adequate cooling to maintain hardware longevity.

Why does lowering the core clock improve efficiency in Kaspa mining?kHeavyHash relies heavily on memory bandwidth rather than core computation. Reducing the core clock lowers power consumption and heat output without significantly affecting hashrate, resulting in better energy efficiency (MH/s per watt).

How do I know if my overclock is stable?A stable overclock runs continuously without crashes, blue screens, or rejected shares. Run the miner for at least 1–2 hours after each adjustment. Use monitoring tools to verify consistent hashrate and absence of thermal throttling. If the system remains stable, the settings are likely safe.