Why is hashrate on miner status different from hashrate displayed on dashboard? In fact, it is a normal phenomenon.
Hashrate on miner status
Hashrate on dashboard
1. Different update periods of Miner Status and Dashboard
In general, hashrate update periods of miner backend and pool dashboard are inconsistent. For example, real-time hashrate displayed in Poolin is the average hashrate of last 15 minutes. Maybe the hashrate of miner is refreshed every 5 seconds. So hashrate on the two sides will be different. Usually, discrepancy of data on Miner Status and Dashboard will not be obvious. However, the two data will be particularly different when hashrate fluctuates greatly due to external reasons.
2. High rejection rate is caused by network reasons, but mining pool only displays real-time hashrate.
When it comes to rejection rate, because the "share" is returned by miner through network. When network performance is poor, network fluctuation during the transmission process will cause a consequence that mining pool receives the incomplete "share" (packet loss) and refuse. Or the "share" has not been transmitted to mining pool, but mining pool has been ready for the next "calculation". Then the "share" does not meet new standards and will be rejected by mining pool, which leads to real hashrate decreases significantly.
Number of rejects / total submissions = rejection rate, that is, the number of "answers" received by mining pool is not equal to the number of "answers" sent by miners. Then the real hashrate of miners will be low. In order to display intuitive data, hashrate displayed in Poolin homepage refers to actual effective received hashrate, while many other mining pools display all the "answers" sent by miners to mining pool.(all of "answers" are recorded by the mining pool). This phenomenon also explains why hashrate in many mining pools is obviously high, but their profits are quite low.
If rejection rate is high, it is recommended to check the network environment. Common scenarios include:
1) All miners in the same router or switch exceed the standard: it is recommended to check overall network performance, try to replace the router or switch.
2) Individual miner exceeds the standard: it is recommended to replace the network cable and network port connected to the miner.
3. Miner and mining pool have different calculation methods for hashrate.
Some miners' backend hashrate GH/s(RT) is calculated based on the frequency of hashrate board: each miner has N hash boards. Hashrate of miners is the sum of hashrate of N hashrate boards. The important point is that sometimes one hashrate board is offline but hashrate is still calculated by some miners, which means miners are doing invalid work. However, mining pool cannot receive these "answers". There will be a difference in hashrate.
As shown in the image above, if some hashrate boards are offline, xxxxxxxxx will be displayed in the last column (red box), that is, there is no real hashrate.
4. Power and voltage instability of miners.
Hashrate submitted by miners to mining pool is related to the stability of power supply and voltage. Instability will cause insufficient power supply and rejection rate will increase. This is caused by hardware problems. As shown in the image above, Miner Status will normally display the rejected shares (rejected column), which is counted by miner itself, that is, this part of "share" is rejected when the controller verifies, and it is not connected to mining pool. So mining pool will display a very low hashrate data in the case of 0 rejection rate.
5. Hacked by third-party firmware.
Sometimes, the usage of third-party firmware, especially when you are mining by GPU miners, mining firmware will be used. Several third-party firmware developers will steal away a small amount of hashrate for private usage. At this time, the only way to avoid this situation is to choose official firmware.
6. "Unofficial firmware" may impact your miner.
"Unofficial firmware" means overclocking firmware or other malicious firmware. "Unofficial firmware" makes miners work at a overclocking status for a long time, which causes great damage to hardware of miner, and the hardware damage will inevitably bring decline in hashrate.