Auradine Teraflux AI3680

The Auradine Teraflux AI3680 is a single-phase immersion SHA-256 miner from US-based Auradine, rated at 375 TH/s for 5,625 W — roughly 15 J/TH. It is built on Auradine’s own in-house ASIC and runs the company’s FluxOS firmware, making it a domestically engineered alternative to Bitmain and MicroBT immersion hardware.

Chip and hashboard architecture

What sets the AI3680 apart from most of the immersion field is that Auradine does not buy its silicon — it designs it. Founded in 2022 in Santa Clara, California and backed by more than $300 million in funding (including a $153 million Series C in 2025, with Marathon Digital among its investors), Auradine was first to market with a 4 nm Bitcoin-mining ASIC. The current shipping Teraflux generation, which the AI3680 belongs to, is built on that leading-edge node; Auradine’s next-generation chip moves to 3 nm. The same chips are sold as standalone parts to third parties such as MARA, FutureBit and Deep South, so this is a genuine independent silicon program rather than a re-badge.

Auradine does not publish a per-board chip count or control-board platform for the Teraflux line, and we will not invent one. What can be stated with confidence is the design principle every modern SHA-256 miner shares: the AI3680 mines by streaming work to long chains of hashing ASICs across its hashboards, and voltage is regulated per power domain rather than per individual chip. That domain-level regulation is exactly what lets firmware trade clock frequency for efficiency, and it is the foundation of Auradine’s “EnergyTune” runtime optimization — the tuning targets are calculated live against the chip’s behavior in the dielectric bath, not pulled from a fixed preset table.

Because the AI3680 is purpose-built for immersion, the unit itself is fanless. Submerged in dielectric fluid, it has no air-moving hardware to fail and no dust path. The acoustic figure sometimes quoted for it (around 55 dB) does not come from the miner — it comes from the circulation pumps and dry cooler that serve the tank loop. The bare hashboards in the fluid are effectively silent.

Real-world power and efficiency

The nameplate is 375 TH/s at 5,625 W, which works out to about 15 J/TH. As always, nameplate and wall draw are not identical numbers: power-supply conversion loss, ambient fluid temperature and the tank’s own pump and dry-cooler load all add to what your meter actually sees, so budget facility power above the sticker, not at it. Immersion’s advantage is on the other side of that equation — submerging the boards holds junction temperatures lower and more stable than air can, which protects the efficiency curve and gives operators real headroom to push hashrate or pull power back depending on electricity cost.

At 15 J/TH the AI3680 sits in the same efficiency class as Bitmain’s 2024 S21 Pro and ahead of older S19-era hardware, but it is no longer the front of the pack: the 2026 wave of immersion and hydro machines (Bitmain’s S23 IMM at roughly 12 J/TH, Auradine’s own next-generation chip targeting 9.8 J/TH) is meaningfully tighter. That makes the AI3680 a capable working-class immersion unit rather than a record-setter — its case is built on supply diversification, density and uptime more than on a leading J/TH number. Operators who want to model frequency, voltage and J/TH trade-offs before committing power should start with our ASIC power profiles database, which lays out how efficiency curves behave across tuning points on comparable hardware.

How it compares

Within Auradine’s own Teraflux family the AI3680 is the immersion middle child: the air-cooled AT2880 is the plug-and-anywhere option, the hydro AH3880 is the density monster, and the AI3680 is the tank-native unit for operators who have already committed to dielectric cooling.

Firmware compatibility

The AI3680 ships with Auradine’s stock FluxOS, managed through the company’s FluxVision fleet software. FluxOS is one of the small number of mining firmwares that speak Stratum V2 natively — relevant for miners who care about template freedom and hashrate decentralization, and a feature it shares conceptually with Braiins on the aftermarket side. FluxVision itself is proprietary and closed-source.

Honesty matters here more than marketing. Auradine is a vertically integrated, closed platform: the silicon, the firmware and the management layer are all Auradine’s, the firmware is signed, and there is no third-party port — no BraiinsOS+, no VNish, no LuxOS, and no DCENT_OS — that runs on this hardware. If open, swappable firmware and zero dev-fee freedom are central to your sovereignty stance, that is a reason many self-hosted miners stay on Antminer-class hardware where open projects exist; on the AI3680, FluxOS is the firmware. The practical upside is that Auradine machines are recognized by the open-source pyasic monitoring library (detected through their Miner UI / FluxOS signatures), so they drop cleanly into standard fleet dashboards and Foreman-style tooling alongside your other miners rather than living in a silo.

Common faults and troubleshooting

Immersion removes the single most common ASIC failure mode — fan death — and dramatically slows dust- and heat-driven degradation. What it adds is a fluid-handling discipline: connector and gasket integrity, pump and dry-cooler health, fluid cleanliness, and the coolant-temperature loop that keeps boards in their safe window. A rising coolant temperature behaves much like the high-temperature faults air and hydro miners throw, and the troubleshooting logic carries over; our walkthrough on a coolant-temperature-too-high condition is a good analog for diagnosing a thermal alarm on a liquid loop.

Beyond thermal alarms, the failure patterns are the familiar ones: a hashboard that drops chains or under-hashes, a power supply that won’t come up, or a control link that goes dark. The fastest way to localize a fault to board, PSU, data or thermal cause is a structured pass through our ASIC fault finder before you pull a unit out of the tank. New silicon and immersion mounting also mean it pays to confirm the firmware reading against an independent monitor — a board reporting low hashrate is not always a board failure.

Repair and longevity

D-Central has repaired ASIC miners in-house in Laval, Québec since 2016, and the diagnostic discipline that fixes Antminers applies to Auradine hardware too: power-rail testing, hashboard chain analysis, connectivity and control-board faults, and the fluid-side checks specific to immersion. We will tell you honestly where the limit is. Auradine’s hashing chips are proprietary 4 nm-class parts with a far thinner aftermarket spare supply than Bitmain’s BM-series, so chip-level board rework on these units is constrained by parts availability in a way it is not for mainstream Antminers. That makes diagnosis the high-value step — confirming whether a fault is a recoverable PSU, connector or control problem, or a board that is genuinely beyond economical repair, so you are not paying to chase silicon that cannot be sourced.

If you are running AI3680s and hit a fault, our ASIC repair service can assess the unit and give you a straight answer. Immersion hardware that is kept in clean fluid, with a healthy pump and dry-cooler loop, tends to age gracefully — the longevity story for this machine is less about the silicon failing and more about disciplined tank maintenance.

Who it is for and buying

The AI3680 is not a home-shelf miner. Being immersion-only, it assumes you already run — or are building — a dielectric tank with the pump, heat-exchanger and dry-cooler infrastructure to support it. For an operator in that position it offers three things worth weighing: a US-designed, non-Bitmain silicon path for supply-chain diversification; native Stratum V2 out of the box; and the thermal stability of immersion for sustained, low-stress operation. The waste heat is genuinely useful — about 19,192 BTU/h carried in the coolant loop, which a heat exchanger can redirect into water or space heating in a properly designed immersion setup instead of being dumped to atmosphere.

Availability is the practical caveat: as an emerging, Auradine-direct product, the AI3680 does not have the deep secondhand market or parts ecosystem of mainstream Antminers, so source it with that in mind. If you are comparing immersion options or sizing a build, our ASIC miner database puts the AI3680’s numbers next to its hydro and air siblings and the wider 2026 field so you can match the machine to your power cost, cooling plan and uptime goals.

Generational context

Auradine deserves credit for doing the hard thing: standing up an independent, US-based mining-silicon program and shipping a 4 nm chip while the market was dominated by a handful of Asian found-customers. The Teraflux AI3680 is the immersion expression of that first-generation effort — a solid 15 J/TH machine that proved the platform. The 2026 landscape has since moved on, with Bitmain’s S23 immersion units and Auradine’s own 3 nm next generation targeting single-digit J/TH, so the AI3680 now reads as a dependable working unit rather than the efficiency leader it was positioned against at launch. For miners who value supply diversification, native SV2 and immersion-grade uptime over chasing the last joule, it remains a legitimate choice — and one that any serious immersion operator should understand before building out a tank.