Mining Firmware Comparison: Every Feature, Side by Side
Updated for 2026. Compare BraiinsOS+, VNish, LuxOS, and stock Antminer firmware across dev fees, auto-tuning, Stratum V2, 120V support, curtailment speed, and more.
Last verified by D-Central:
Quick answer
Among third-party Antminer firmware in 2026, BraiinsOS+ is the only one with native Stratum V2, VNish covers the widest Antminer model range with the most aggressive overclocking, and LuxOS leads on curtailment speed and 120V support. All three add per-chip frequency autotuning and per-domain undervolting; dev fees run 2-2.8%. DCENT_OS (0% default fee) is in closed beta.
Feature Comparison Matrix
Click any column header to highlight that firmware. Use the filter buttons to focus on specific feature categories.
| Feature | Stock (Bitmain) Bitmain | BraiinsOS+ Braiins | VNish VNish | LuxOS Luxor Technology | DCENT_OS D-Central |
|---|---|---|---|---|---|
| Dev Fee Percentage of hashrate directed to the firmware developer as payment. | 0% | 2 - 2.5% | 2 - 2.8% | 2.8% | 0% (default) |
| Open Source Whether the firmware source code is publicly available for audit and modification. | Partial (BCB100 hardware only) | 100% GPL-3.0 (beta target) | |||
| Stratum V2 Support for the next-generation Stratum V2 mining protocol with encryption and job declaration. | Planned | ||||
| Auto-Tuning Per-chip frequency and per-domain voltage optimization for maximum efficiency or hashrate. | Planned | ||||
| 120V Support Ability to run ASIC miners on standard North American 110V/120V household outlets. | Planned | ||||
| Immersion Mode Optimized settings for liquid immersion cooling: fans disabled, higher temp limits. | Planned | ||||
| SOC 2 Certified SOC 2 Type 2 security compliance certification for enterprise environments. | Yes (SOC 2 Type 2) | ||||
| Curtailment Speed Time to reduce power consumption for demand response or grid curtailment events. | N/A | ~30s | ~15s | <5s | Planned |
| Mining Software The underlying mining engine used to communicate with ASIC chips. | CGMiner / BMMiner | BOSminer (Rust) | Proprietary | Proprietary | dcentrald (Rust) |
| Supported Models Antminer hardware models compatible with this firmware. | All Antminer models | Antminer S9, Antminer S17, Antminer S19, Antminer S21 | Antminer S9, Antminer S17, Antminer S19, Antminer S21 | Antminer S19, Antminer S21 | Antminer S9 (active closed beta), S19 / S21 in active development |
Data verified as of March 2026. Feature availability may vary by Antminer model and firmware version.
Firmware Details
In-depth look at each firmware option: what it does best, who it is for, and key technical details.
Stock (Bitmain)
0% dev feeThe default firmware shipped with every Antminer. No dev fee but lacks advanced tuning, efficiency optimization, and modern protocol support. Suitable for plug-and-play operation with no customization needs.
- Developer Bitmain
- Mining Software CGMiner / BMMiner
- Base OS Angstrom / Yocto
- Supported Models All Antminer models
- Curtailment N/A
BraiinsOS+
2 - 2.5% dev feeThe only firmware with native Stratum V2 support. Partially open-source with the BCB100 control board hardware fully published. Per-chip auto-tuning optimizes efficiency (J/TH). Popular among efficiency-focused miners.
- Developer Braiins
- Mining Software BOSminer (Rust)
- Base OS OpenWrt
- Supported Models Antminer S9, Antminer S17, Antminer S19, Antminer S21
- Curtailment ~30s
VNish
2 - 2.8% dev feeThe most widely deployed third-party firmware with over 1.5 million devices running VNish worldwide. Known for aggressive hashrate boosts of 20-30% via per-chip auto-tuning. Closed-source with a proven track record across the S9 through S21 lineup.
- Developer VNish
- Mining Software Proprietary
- Base OS Linux
- Supported Models Antminer S9, Antminer S17, Antminer S19, Antminer S21
- Curtailment ~15s
LuxOS
2.8% dev feeThe first SOC 2 Type 2 certified ASIC firmware. Built by US-based Luxor Technology, LuxOS leads in curtailment speed (under 5 seconds) and is the first firmware to support 110V/120V household power. Its 2.8% dev fee is mandatory: it is only offset to roughly 0% effective when you mine on Luxor’s own pool (through a monthly pool-fee rebate), and on any other pool you pay the full 2.8%. Ideal for enterprise and compliance-focused mining operations.
- Developer Luxor Technology
- Mining Software Proprietary
- Base OS Linux
- Supported Models Antminer S19, Antminer S21
- Curtailment <5s
DCENT_OS
0% (default) dev feeAn open-source (GPL-3.0) firmware being built for industrial Antminers. Its dev fee is a 0% mandatory target with no required hashrate redirect — the goal is a stack that is GPL-3.0 and yours to audit and modify. Built to bring these machines home and, increasingly, to bridge them into AI compute. It is in active closed beta on the Antminer S9 today; S19 and S21-class support is in active development, with public beta planned for summer 2026 (an estimate). It is experimental and can brick your miner. Standing on the shoulders of BraiinsOS+, VNish, and LuxOS, who pioneered the autotuning and tooling we learned from.
- Developer D-Central
- Mining Software dcentrald (Rust)
- Base OS Buildroot
- Supported Models Antminer S9 (active closed beta), S19 / S21 in active development
- Curtailment Planned
Key Takeaways
Lowest Dev Fee: Stock (0%)
Stock firmware has zero dev fee but lacks auto-tuning, meaning less efficient operation. BraiinsOS+ at 2-2.5% offers the best balance of fee vs. efficiency gains that typically exceed the fee cost.
Fastest Curtailment: LuxOS (<5s)
LuxOS can reduce power to approximately 25W in under 5 seconds, critical for demand response programs. BraiinsOS+ and VNish take around 30 seconds, which may not meet strict grid curtailment requirements.
Only Stratum V2: BraiinsOS+
BraiinsOS+ is the only firmware with native Stratum V2 support, enabling encrypted mining connections, job declaration for better decentralization, and reduced bandwidth usage compared to Stratum V1.
120V Home Mining: LuxOS Only
As of February 2026, LuxOS is the only firmware supporting 110V/120V household power via APW12 PSU bypass mode. This makes it the sole option for home miners without 240V electrical infrastructure.
Frequently Asked Questions
Stock Bitmain firmware has a 0% dev fee, but it lacks auto-tuning and efficiency optimization. Among third-party firmwares, BraiinsOS+ has the lowest dev fee at 2-2.5%, followed by VNish at 2-2.8%, and LuxOS at 2.8%. The efficiency gains from auto-tuning typically more than offset the dev fee cost.
BraiinsOS+ is the only ASIC mining firmware with native Stratum V2 support. Stratum V2 provides encrypted connections between your miner and pool, job declaration capabilities for improved decentralization, and reduced bandwidth usage. Neither VNish, LuxOS, nor stock firmware support Stratum V2.
As of February 2026, LuxOS is the only firmware that supports running Antminer S19 and S21 models on standard 110V/120V North American household outlets. This works via APW12 PSU bypass mode. Stock firmware, BraiinsOS+, and VNish all require 220-240V power.
LuxOS leads with sub-5-second curtailment, reducing power to approximately 25W almost instantly. This is critical for participation in demand response programs with strict response-time requirements. BraiinsOS+ and VNish both take around 30 seconds to curtail, which may not meet some program requirements.
LuxOS is the only firmware with SOC 2 Type 2 certification, making it the preferred choice for enterprise and institutional mining operations that require compliance documentation. It also offers the fastest curtailment for grid response and a Python SDK for fleet automation.
Yes. BraiinsOS+, VNish, and LuxOS all offer advanced auto-tuning that optimizes frequency per chip and voltage per domain on every hash board. Stock firmware uses uniform settings across all chips, leaving significant efficiency gains on the table.
Stock firmware supports all Antminer models. VNish supports the widest range of third-party models from S9 through S21. BraiinsOS+ supports S9, S17, S19, and S21 series. LuxOS has the narrowest support, covering only S19 and S21 models.
BraiinsOS+ is partially open source. The BCB100 control board hardware design and firmware are fully open (GPLv3 software, CERN-OHL-S hardware), and the gRPC API definitions are published. However, the BOSminer binary, boser daemon, and web UI remain proprietary. VNish, LuxOS, and modern stock firmware are fully closed-source.
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