Independent hub • checksums • v1.2.7-stable

VNISH Firmware for Antminer ASIC Miners

The professional custom firmware and VNISH Online Updater (VOU) for Bitmain Antminer S19, S21, T21, L7 and L9. Per-chip autotune, ASICBoost, immersion mode, fleet management and one-click rollback — free download.

+15–30%
Hashrate boost
−25%
Power use (LPM)
1-Click
Rollback
Free download
1.8–2.8% dev fee
SHA256 verified
Checksums included

VNISH Online Updater

Install, monitor, and manage miner groups

One-click firmware installation
Real-time fleet monitoring
Mass settings cloning
Direct VOU downloads
40+
Supported model SKUs
3
VOU packages
18
Localized pages
SHA256
VOU archive

Why miners choose VNISH

VNISH replaces the conservative one-size-fits-all stock Bitmain firmware with a precision tuning engine, real fleet tools and a clear safety net.

Higher hashrate

15–30% more TH/s on supported S19/S21 models thanks to optimised low-level instructions and ASICBoost-style optimisations.

Lower J/TH

Low-Power Mode (LPM) and per-chip undervolting deliver up to 25% energy savings, ideal for high electricity rates and home miners.

Fleet at scale

VOU deploys firmware, clones settings and monitors grouped devices from one dashboard.

Production-grade safety

Brute-force protection, ANTBUILD/NIGHT SWITCHER malware cleanup, EEPROM safeguards and one-click rollback to stock.

Custom ASIC Firmware Features

Optimize your mining hardware

Everything you need to push more hashrate, cut power and keep the fleet stable — built into one firmware.

Per-chip Autotune

Analyses each ASIC chip and applies the optimal voltage and frequency individually. Pushes healthier chips and protects weaker ones for the best stable J/TH.

ASICBoost & Low-Level Tuning

Optimised SHA-256 work paths and tightened low-level instructions deliver double-digit hashrate gains versus stock Bitmain firmware.

Low Power Mode (LPM)

Drop power up to 25% with dynamic frequency scaling and precise voltage control — perfect for home miners and high-electricity sites.

Per-chip Throttling

Per-chip throttling for the x21 series adjusts cooler and hotter chips separately to keep hashrate stable under thermal pressure.

Immersion & Hydro

Dedicated immersion mode disables fan checks for submerged miners; hydro models get inlet/outlet water-temperature widgets and tailored presets.

Mass Install & Cloning

Push firmware and matching settings to grouped miners on the same network with progress tracking.

Auto-scheduling

Switch presets by time-of-day to mine harder during off-peak electricity hours and dial back power during peak rates.

Malware Protection

Detects and removes ANTBUILD, NIGHT SWITCHER and other ASIC malware that hijack hashrate to attacker pools.

One-click Rollback

Revert to stock Bitmain firmware in one click or via SD recovery image — warranty-friendly recovery on supported models.

Open API + Telegram

Pull metrics into your own dashboards or get instant Telegram alerts on hashboard errors, overheats and pool failures.

Hardened Security

Brute-force protection on the web UI, SSH controls, EEPROM corruption fixes and chain-error auto-shutdown for non-PIC models.

Smart Fan Control

Auto fan curves with safe fail-states, max-speed caps in auto mode, and customisable thresholds for noise-sensitive deployments.

Built for serious mining operations

From a single home miner to larger industrial fleets, VNISH is built for day-to-day S19, S21, L7 and L9 workflows.

Performance gains by model

Typical results after VNISH autotune on healthy hardware with adequate cooling. Actual numbers vary by chip lottery, ambient temperature, and PSU.

ModelStock hashrateVNISH typicalStock J/THVNISH J/THBoost
Antminer S1995 TH/s110–115 TH/s34.530–31+15–20%
Antminer S19 Pro110 TH/s130–138 TH/s29.526–27+18–25%
Antminer S19j Pro104 TH/s120–125 TH/s29.527–28+15–20%
Antminer S19 XP140 TH/s160–172 TH/s21.519–20+15–23%
Antminer S19k Pro120 TH/s136–144 TH/s2320–21+13–20%
Antminer S21200 TH/s225–240 TH/s17.515.5–16+12–20%
Antminer S21 Pro234 TH/s260–280 TH/s1513.5–14+11–20%
Antminer S21 XP270 TH/s300–320 TH/s13.512–12.5+10–18%
Antminer T21190 TH/s205–220 TH/s1917–18+8–15%
Antminer L7 (9050M)9.05 GH/s9.6–10.0 GH/s0.360.32–0.34+6–10%
Antminer L916.0 GH/s17.0–17.6 GH/s0.340.30–0.32+6–10%

All figures are approximate and depend on individual hardware. VNISH does not guarantee specific results — tune conservatively first.

Download VOU (VNISH Online Updater)

Choose the VOU package for your platform. Windows, macOS and Android files are hosted on this domain so you can download and verify them from one place.

Verify these downloads against SHA256 checksums before running them.

Windows

Windows 10 / 11

Windows 7z archive

Download VOU

macOS

Apple Silicon / Intel

macOS zip archive

Download VOU

Android

Android APK

Android APK file

Download VOU
Discovery: Scan LAN ranges and find supported Antminer devices.
Bulk install: Push VNISH firmware to compatible miners in batches.
Rollback: Keep recovery files ready before production flashing.

Supported Antminer models

VNISH 1.2.7-stable supports 40+ Antminer SKUs across BTC and LTC mining, including air, hydro and immersion variants.

BTC

S19 Series (air)

  • S19, S19 (88), S19 (126), S19+, S19A, S19A Pro
  • S19i, S19j, S19j+, S19j Pro, S19j Pro+, S19j Pro A
  • S19k Pro, S19 Pro, S19 Pro A
  • S19 XP, S19 XP+, S19j XP
BTC

S19 Hydro / Immersion

  • S19 Hydro
  • S19 Pro Hydro, S19 Pro Hydro 120, S19 Pro+ Hydro
  • S19 XP Hydro, S19 XP+ Hydro, S19j XP Hydro
  • S19E XP Hydro
BTC

S21 Series (air)

  • S21, S21+
  • S21 Pro, S21 XP
  • U3S21EXPH (XP Hashboard)
BTC

S21 Hydro / Immersion

  • S21 Hydro, S21+ Hydro
  • S21 Imm, S21 Immersion
  • S21 XP Hydro, S21 XP Imm, S21E Hydro
BTC

T19 / T21 Series

  • T19, T19 Hydro, T19 Pro Hydro
  • T21, T21 Xilinx
LTC / DOGE

Scrypt (L-Series)

  • Antminer L7 (all sub-models 8050M–9500M)
  • Antminer L9

Control board types: XIL, AML, CV, BB

Always pick the firmware build that matches your specific control board. XIL = Xilinx, AML = Amlogic, CV = Cvitek, BB = BeagleBone. Mismatched firmware will not boot. The factory sticker or VOU device probe shows your board type.

Firmware downloads by model

Which control board types are supported?

VNISH supports Xilinx (XIL), Amlogic (AML), Cvitek (CV) and BeagleBone (BB) control boards. Always pick the firmware build that matches your board — VOU's device probe will tell you.

How do I install on a brand-new Antminer?

Check the stock firmware date. If incompatible (March–Nov 2024 or Sep 2025+ on Amlogic), install Bitmain's recovery SD image first. Then use VOU for a clean NAND install of VNISH and run autotune.

Can VNISH automate based on electricity prices?

Yes. The auto-scheduler switches presets by time of day — mine in LPM during peak electricity hours, switch to overclock during off-peak hours. Fully configurable in the dashboard.

Warranty notice

Installing custom firmware may void Bitmain warranty. Use one-click rollback or the Bitmain recovery image to restore stock before any RMA.

Tune conservatively

Aggressive overclocks need adequate cooling and a quality PSU. Start with a default preset, validate stability for 24h, then push voltage/frequency.

Verify integrity

Always verify SHA256 checksums for VOU packages and any release hash supplied with firmware downloads. Only flash files matched to your exact model and control board.

About VNISH

VNISH is a custom mining firmware project active since 2016. Built by a team of engineers with deep ASIC experience, VNISH replaces the conservative stock Bitmain firmware with precision tuning, real fleet tools and a clear safety net for both home miners and industrial farms.

S19 / S21
Antminer BTC series
Air, hydro and immersion variants
L7 / L9
Antminer LTC / DOGE
Scrypt miner support
3–4 h
Typical autotune
Per-chip optimisation window