ROI ASIC

LOADING CATALOG

OFFICIAL VNISH FIRMWARE FOR ANTMINER

Your Antminercan do more.The firmware unlocks it

Same machine, same watts - more output. Official VNISH firmware: 15-minute remote install, dozens of presets for your power price, one-click rollback to stock.

Install firmware →Open ROI Lab

26%+

of the world's custom firmware*

Antminer models supported

15min

remote, rollback-safe

*Cambridge 2025, firmware usage among surveyed participants, hashrate-weighted

In short

ROI ASIC is an official distribution of VNISH firmware for 45 Antminer models (S21, T21, S19, L7, L9 series). The build is free; a developer fee of 1.8-2.8% of hashrate is always visible in the dashboard. Remote NAND install takes about 15 minutes and is fully reversible to stock. Product presentations are available in 8 languages.

GUIDED PATH

Install Assistant

Answer a couple of short questions - get the exact file, the right tool and a step-by-step plan for your miner. No guesswork

Why it pays

In 2026 the winner is whoever mines cheaper

Block rewards shrink, power prices climb, and replacing your fleet means new capital outlay and new risk. The cheapest extra output is raising the performance of the hardware you already own: fine tuning cuts the energy spent per terahash (that J/TH figure), and factory settings leave that money on the table every day.

Firmware Finder

Type your model. Get the exact build

Firmware Cockpit

source verified · official versions only

Model

Control board

Method

BUILD --v1.3.4-stable · reversible

SHA-256-

Download build Install guide

The file is half the job: installing takes the toolkit and five steps. Hit Install guide - the assistant builds the full kit for this model

Why VNISH

Six reasons serious miners switch

Performance

Up to 20% more hashrate

Per-chip auto-tuning unlocks the performance your hardware already has.

Economics

Fewer watts per terahash

Efficiency profiles cut watts per terahash and extend hardware life.

Thermal

Smart temperature control

Auto-switching presets protect your miners through heat waves and winters.

Fleet

One-click mass deployment

Install and clone settings across unlimited miners in one network.

Integration

Full API access

Automate, monitor and integrate with your own stack via complete APIs.

Visibility

Real-time mining intelligence

Track every metric live and fine-tune profit as conditions change.

Self installation

No tech skills? Three steps, 15 minutes

Find your build

Type your model in the Finder. You get the exact verified file for your control board, with the developer fee already routed.

Install over the network

Run the toolkit: remote NAND install in about 15 minutes. No SD card, no physical access for most boards.

Watch your miner's performance grow

Open the dashboard and pick from a whole range of presets - from quiet eco to overdrive. The effect shows immediately; rollback anytime.

Proven on current-gen

Same S21. Sharper economics

Stock factory VNISH · Efficiency VNISH · Max output

Hashrate

224 TH

Power

2934 W

J/TH

13.1

Effect

+14% margin

Same machine, 16% less power for 4% less hashrate: energy per terahash drops from 15.0 to 13.1 joules. At $0.08/kWh that lifts daily margin by roughly 14%.

Antminer S21 Pro · Numbers are estimates, not guarantees.

Inside the firmware

The dashboard you actually run

Hashrate, thermal bands, pools with visible DevFee status, fans and per-board health. This is the interface behind every build on this page.

Monitoring

▦ Dashboard

Settings

⛏ Mining

⚙ System

🛟 Tech. support

⇪ Firmware update

Hashrate

233.12

Current: 234.06 · TH/s

Temperature

38° - 64°

Board: 23° - 49° · °C

Power

4318

Estimated data · Wh

Errors

0 H/s

Performance ⚡ tuned

4300 watt ~ 233 TH

Efficiency: 18.5 J/TH · Autoswitch: disabled

Hashrate 1h · 12h · 24h

10:00 · 12:00 · 14:00 · 16:00 · 18:00

Temperature 1h · 12h · 24h

16:00 · 20:00 · 00:00 · 04:00 · 08:00 · 12:00

Pools

btc.vnishpool.com:3333524K diff195 accActive: 16ms btc.vnishpool.com:443131K diff0 accAlive btc.vnishpool.com:25- diff0 accOffline

• DevFee: Online

Fans Mode: Auto · Fan duty: 72%

Fan 17590 RPM ✻

Fan 28000 RPM ✻

Fan 38000 RPM ✻

Fan 47710 RPM ✻

Board 1 ↗

77.64 TH/sHR (99.72%)0.00 H/sErrors38-64 °CTemp678.23 MHzFreq15.03 VVoltage108chips good

Board 2 ↗

77.91 TH/sHR (100.04%)0.00 H/sErrors40-63 °CTemp684.02 MHzFreq15.03 VVoltage108chips good

Board 3 ↗

77.57 TH/sHR (98.42%)0.00 H/sErrors39-64 °CTemp681.87 MHzFreq15.03 VVoltage108chips good

⌨ LogsAntminer T21v1.3.4

ROI Lab

Estimate your margin on real numbers

Your operation

Fleet size50

Electricity$0.06 / kWh

Hashprice$0.055 / TH / day

Machine-

Fewer watts at almost the same hashrate: the power bill drops faster than output - that is where the extra margin comes from

Numbers are estimates, not guarantees.

12-month projection

Stock / day

VNISH / day

Extra margin / year

ROI modelling

Payback, depreciation and hashprice scenarios per model and site, before you deploy a single build.

Accounting clarity

Clean, exportable records of output and cost - ready for your books and your accountant.

Jurisdiction planning

Understand the legal, fully-declared options in your region, together with a qualified advisor.

Informational only. Not tax, legal or financial advice. Confirm every optimization with a qualified consultant in your jurisdiction.

Who we are

ROI ASIC is the official distribution of VNISH firmware - the most widely used custom ASIC firmware on the planet. One product, done properly: real builds, real support, real economics

300+

global partners

Antminer models supported

languages of support

2017

firmware heritage since

Distribute your own branded firmware

For mining hotels, colocation providers and large fleets: your logo, your personal fee proxied to any pool, our full technical support. Every hosted ASIC becomes your recurring revenue stream.

24/7 support for setup, updates and full miner configuration

Exclusive dev-fee terms for high-volume and enterprise miners

Become a partner

Materials

The detailed presentation, in your language

A complete 2026 presentation: product, economics, security and partnership terms. Eight languages, ready to forward to your team or investors.

Your language

🇬🇧VNISH · Official presentationEN2026 EDITION · 15 PAGES

FAQ

Straight answers

Yes. The build is free to download and run. A developer fee of 1.8-2.8% of hashrate applies and is always visible in the dashboard - never hidden. The fee funds what keeps the product alive: new releases for new models, round-the-clock technical support and the ecosystem the team has been building since 2017.

Yes. Every build is reversible: a built-in rollback returns the miner to stock firmware without traces, so warranty terms stay intact.

45 models across the S21, T21, S19, L7 and L9 series, including Hydro and Immersion versions, on Amlogic, BeagleBone, Xilinx and CVITEK control boards.

About 15 minutes remotely over the network (NAND install via toolkit). No SD card or physical access is required for most boards.

ROI Lab models payback and margin per site, keeps clean exportable records for your accountant, and maps fully legal, declared optimization options for your jurisdiction.

Full catalog · v1.3.4-stable · direct links

Every supported Antminer. One click each

Free download. Developer fee 1.8-2.8% of hashrate - always visible in the dashboard, never hidden. Every build reversible to stock.