Common Solutions for Abnormal Hashrate & High Rejection Rate

Why is my pool hashrate lower than my miner's local hashrate?

Different Calculation Methods
The pool displays the average effective hashrate (e.g., 15-minute, 24-hour average), while the miner shows the real-time hashrate, which includes both effective and invalid hashrate.

Insufficient Runtime
Pool statistics require time to stabilize. Hashrate readings within the first 15 minutes can have large fluctuations. It is recommended to check the 24-hour average hashrate.

Normal Hashrate Loss

• Network Latency: Some hashrate may become invalid when submitting to the pool due to latency. The pool displays the average hashrate over a recent period, while the miner shows the instantaneous hashrate.
• Developer Fee (DevFee): Mining software typically deducts a small percentage of hashrate (usually 0.5% - 2%, commonly for GPU miners) as a developer fee.
• Third-Party Firmware Fee: Third-party firmware often charges a small service fee to support their team in providing hashrate improvements and stability optimizations. Miners can decide whether to use it based on their profitability.
• Overclocking Instability: Excessive overclocking can cause hashrate errors. While this may not immediately increase the rejection rate, it can significantly reduce the effective hashrate.

Normal Margin of Error:

• ASIC: Within 2%

Troubleshooting Abnormal Hashrate Loss

• If Rejection Rate is High: High rejection rate often indicates network issues causing the pool to receive fewer shares. Check network equipment such as broadband connection, router, and ethernet cables.
• If Rejection Rate is Normal: If the rejection rate is normal but the hashrate deviation is large, inspect the miner's hardware and overclock settings. Try restarting the miner, reducing overclock frequencies, or swapping hashboards to isolate the issue.

How to Handle High Rejection Rate?

Rejection Rate Definition
The rejection rate refers to the percentage of invalid results submitted by the miner, often due to network latency. Typically, the rejection rate for mainstream coins should be under 1%.

If the rejection rate exceeds 1%, please check the following:

• Network Connection: A sudden spike in rejection rate is usually caused by network instability. Check your network connection status.
• Miner Temperature: High temperatures can impair miner performance and increase the rejection rate. Ensure the miner is operating within normal temperature ranges.
• Firmware Issues: Some miners may have high rejection rates due to firmware problems. If you suspect this, contact the miner manufacturer for support.