Frequently Asked Questions

UMC OS enables users to install ePIC firmware directly onto stock control boards, offering a flexible alternative to using proprietary ePIC UMC boards.

It provides all of ePIC’s advanced firmware features and configurations available via Webdash.

If you are using stock control boards, you must manage the firmware using the RigRunner application with the umcos-antminer firmware files.

If you are using an ePIC UMC board, you must use the powerplay-antminer firmware files.

Recent updates also allow users to update their systems via a simple drag-and-drop system update upload directly on the Web UI.

Yes, there is a 1.5% dev fee, which was recently lowered to provide significant savings. 

If you are interested in licensing options, please contact license@epicblockchain.io.

UMC OS supports Amlogic, Xilinx, and BeagleBone stock control boards. 

The firmware currently supports the S19 series (S19, S19 Pro, S19J, S19J Pro, S19K Pro, S19 XP, S19J Pro+) and the S21 series (S21, S21 Pro, S21+, S21 XP).

Our firmware allows you to set voltage and frequency manually. However, using the Perpetual Tune feature will automatically calculate the best frequency and voltage to reach your target hashrate with optimal efficiency.

Voltage Optimizer: Adjusts the chip clock by changing the frequency on all chips to find the best efficiency at a certain voltage. 

Chip Tune: Targets a specific setting and adjusts the chip clock by changing the frequency of individual chips to achieve the best performance at a specific voltage.

Board Tune: A hybrid of Voltage Optimizer and Chip Tune. It adjusts the board clock by changing the frequency of individual chips on the best-performing hashboards. 

Note: Board Tune is now the default algorithm for S21 miners.

No, we recommend not making any changes to the Tune settings while Perpetual Tune is active, as the software will overwrite any modified values and continue auto-tuning.

This error indicates that the hashboards are not working. Check all physical connections, and try running Voltage Optimizer instead, as it can adjust the throttle up and down based on temperature.

Yes, but there are conditions to consider. Since voltage is influenced by temperature, being too aggressive with AutoFan can interfere with the tuning. You must fine-tune both settings to suit your specific environment.

Power consumption on Webdash is estimated due to the lack of current feedback from certain models of Antminer PSUs. For the S19 series, we recommend reading the power directly from the meter for the most accurate results. Accurate power readings for the APW17 (S21 and S21 Pro) are available on newer firmware versions.

We are actively working on adding a Power Tune feature.

Some Bitmain chips are unique. ePIC has discovered a pattern on Antminers with BM1366 ASIC chips (like the S19K Pro and S19 XP) that outperforms stock performance when overclocking using Overdrive mode.

We encourage cautious overclocking. Each chip and system has its own unique sweet spot. While our system allows you to overclock, optimal performance is not guaranteed if pushed past stable limits.

We have built-in features for overheat protection, such as survival mode. The firmware monitors temperature every 3 seconds and automatically throttles down the hashrate when approaching the shutdown temperature. 

If it reaches the limit, it shuts down power to protect the chips and cools down before ramping back up.

While the miner’s uptime should increase when hashrate decreases (reducing heat production), if the miner still reaches the shutdown temperature, it will shut down to protect the chips and cool down before ramping up to the new throttled target hashrate.

Try reconnecting the fan, and check the number of fans detected versus the “Minimum Working Fans Required” setting under FANS. If replacing the fans with working ones doesn’t resolve the issue, the control board itself may be damaged.

Check all internal connections. If the ambient temperature is above 40°C, the PSU might shut down, leading to communication loss with the chip.

You can also consider rolling back to an older firmware version to see if the issue persists.

Check whether your network connection and the mining pool are functioning correctly. If configured incorrectly, clear and re-add your pool address by going to Mining Config > Clear Fields, pasting your pool address, and filling in your pool username under Worker Name.

The Unique ID is useful when managing hundreds of miners. It helps identify your miner by its IP address, MAC address, or CPU ID under the Worker Name on the dashboard.

Yes, we have a function called “Idle On Connection Lost” which prevents the miner from drawing unnecessary power, and it is enabled by default.

Yes, the Hashrate Split feature is supported. Recent updates have also added hashrate split quota controls via the API and Web interface.