Recommended S19 workflow
Back up pools and network settings, identify the control board, prepare SD recovery if the stock firmware date is restricted, then use VOU only after the miner is reachable and stable.
Antminer S19 guide
VNISH firmware for Antminer S19 series
Use this guide to check S19, S19 Pro, S19j Pro, S19k Pro, S19 XP and hydro variants before flashing. Each family can require a different board, method or firmware package.
S19 / S19 ProS19j Pro / S19k ProS19 XP / HydroXIL / AML / CV / BB
| Check | What to verify | Why it matters |
|---|---|---|
| Control board | Xilinx, Amlogic, Cvitek or BB | The wrong package can fail to boot or block NAND install |
| Install method | SD recovery, NAND install or update | Fresh install and update packages are not interchangeable |
| Cooling | Air, hydro or immersion | Fan logic and temperature targets differ by hardware |
| Stock date | March-November 2024 and September 2025+ need attention | Some stock Bitmain builds require a recovery step before VNISH |
Tuning target
Start with a conservative power target. Let autotune complete before pushing hashrate. A healthy S19j Pro usually benefits more from efficiency tuning than from aggressive overclocking in hot rooms.
Common S19 mistakes
Do not flash an S19 XP package onto an S19j Pro, do not ignore hydro/immersion differences, and do not assume every S19 has the same control board.
Frequently asked questions
Can I install VNISH directly on every S19?+
No. Direct install depends on the stock firmware date and control board. If the current stock build is restricted, use the correct recovery path first.
Should I choose SD or NAND for S19?+
Use SD for recovery and first tests. Use NAND for production once the miner is verified.
Does VNISH guarantee a fixed S19 hashrate?+
No. Results depend on chip quality, PSU headroom, cooling and ambient temperature.
Related VNISH guides
Continue through the model, install and recovery pages before flashing production miners.