Firmware Features Series – Immersion Mining and Firmware: What LuxOS Changes

This post is part of Luxor's Firmware Features Series, which covers the core Bitcoin mining concepts behind the flexible firmware features that give operators custom control over performance and profitability.

Submerge an ASIC in dielectric fluid and its biggest constraint — air — disappears. But the machine's stock firmware was written for fans, and it needs to be told the rules have changed.

TLDR

• Immersion mining cools ASICs by submerging them in non-conductive dielectric fluid instead of moving air across heatsinks.
• LuxOS has a dedicated immersion mode: enable it and all fans are disabled entirely. No phantom fan errors, no wasted fan power.
• Fluid's superior heat transfer creates thermal headroom. Preset profiles, AutoTuner, and Advanced Thermal Management (ATM) let you convert that headroom into stable overclocks.
• Temperature protections stay active. Target, Hot, and Dangerous thresholds still govern the boards.

What Is Immersion Mining?

Immersion mining is a cooling method in which miners run fully submerged in a bath of dielectric fluid (a liquid that carries heat far better than air but doesn't conduct electricity). Compared to air cooling, immersion removes dust, dampens noise to near silence, stabilizes board temperatures, and supports much higher power densities air can't touch. The trade off is capital cost and operational complexity: tanks, fluid, heat exchangers, and machines that need their fans removed.

Why Firmware Matters in the Tank

An air-cooled ASIC's firmware leans on its fans constantly, for cooling, but also as a health signal: stock firmware treats missing fans as a fault. Drop that machine in fluid without telling the firmware and you get error states and fan-control logic fighting a cooling system that no longer exists. Luxor's firmware LuxOS has an immersion mode which resolves this cleanly: switch it on and all fans are disabled entirely, with no error spiral and no wasted fan wattage.

The bigger win is what tuning does with the extra thermal headroom. Fluid holds hashboards at steadier, lower temperatures through conditions that would force an air-cooled machine to throttle. That stability is exactly what overclock profiles want: step up the ladder, let the AutoTuner find the minimum stable voltage at each frequency, and keep ATM's thresholds as a safety net underneath.

Setting Up LuxOS for Immersion

1. Enable Immersion Mode under Settings → Advanced Settings (or fleet-wide via Commander). All fans are disabled.
2. Define temperature thresholds → target, hot, and dangerous temperatures still protect the boards, and ATM still steps the miner down if fluid temperatures climb.
3. Overclock dilligently → raise the max profile or power target stepwise and let the AutoTuner stabilize each step before the next.

For a sense of what this looks like at scale, see our tour of an immersion and hydro-cooled Bitcoin mine, and our deep dive into the HeatCore HS20 hydro system for how liquid cooling pairs with heat recyling.

Immersion Mining FAQ

Do I need special firmware to mine in immersion? You need firmware that can disable fan logic cleanly. With LuxOS that's a single click.

Can I overclock harder in immersion? Generally yes — steadier, lower board temperatures support higher sustained frequencies. Step up gradually and leave thermal protections on.

Do temperature protections still work without fans? Yes. Board sensors, ATM, and the dangerous-temperature shutdown all remain active; only the fan logic is disabled.

Does immersion change my pool or tuning workflow? No. Profiles, AutoTuner, power targets, and Commander all work identically.

Conclusion

Immersion removes the air constraint; firmware decides how much of the freed-up headroom you actually bank. Get the fan logic out of the way, keep the thermal protections on, and let tuning turn steadier temperatures into sustained hashrate.

Planning an immersion deployment with LuxOS? Talk to Luxor's Firmware team about immersion fleet setup and tuning.

If you'd like to learn more about Luxor's full-stack Bitcoin mining services, reach out to [email protected] or visit luxor.tech.

About Luxor Technology Corporation 

Luxor delivers hardware, software, and financial services that power the global compute and energy industry. Its product suite spans Bitcoin Mining Pools, ASIC Firmware, Hardware trading, Hashrate Derivatives, Energy services, a Miner Management software, Commander, and a bitcoin mining data platform, Hashrate Index.

Disclaimer

This content is for informational purposes only, you should not construe any such information or other material as legal, investment, financial, or other advice.