Antminer S19 Family Owner's Hub: Every Variant, Spec, Repair and Used-Buying Guide

The S19 is the most-deployed Antminer generation in the world, and the one owners most often run at home, convert to heat, or buy used. This hub decodes which S19 you actually have, what is inside it, and how to keep it alive — the data Bitmain spreads across half a dozen undated pages, gathered with our bench corrections.

Variant decoder — every Antminer S19 member, with the internals Bitmain never states

Voltage is regulated per voltage domain, never per chip — a group of chips shares one regulated rail. Frequency and voltage targets are calculated at runtime by the autotuner; they are not fixed presets.

Owner data strip — tuning, errors, profiles, repair

The S19 has the deepest public tuning data of any model: 14 documented power profiles spanning roughly 67 TH/s @ 1630 W (24.3 J/TH) up to 130 TH/s @ 4700 W, with stock near 95 TH/s @ 3250 W. The efficiency floor (~24.3 J/TH) is about a 29% improvement over stock. Frequency and voltage are derived at runtime, not stored as fixed presets. Full bands are in the Power Profiles Database.

• Power Profiles Database — wall-watt vs hashrate vs J/TH tuning bands.
• Universal ASIC Spec Database — full per-SKU spec rows for every Antminer S19 variant.
• ASIC Fault Finder — 650+ error codes, filterable by model and symptom.
• Antminer S19 hashboard repair (domain map, PIC role, chip-level diagnosis)
• ASIC Fault Finder — filter by S19 symptom

Lifecycle — support, used market, and second life

Support / end-of-service: Still current and supported as of June 2026, but the S19 is the generation most likely to hit end-of-service first as newer models arrive. Watch the EOS Tracker, and note Bitmain's control-board warranty is shorter than the miner warranty.  Antminer EOS Tracker →

Used market: The S19 is the backbone of the used market. A used S19 / S19 Pro is the classic first heater or 120 V home rig. Check hashboard health and control-board type (Zynq vs BeagleBone vs Amlogic) before buying.

Heat reuse: At ~3.25 kW the S19 is the canonical Bitcoin space heater. Underclocked to ~70–80 TH/s it is quiet enough for a garage or workshop. This is exactly the home/120 V use case the rest of the site documents in depth.

Fix it — top failure modes and what they cost

• Hashboard "0 chips found" / chain 0 ASIC count low — usually a broken signal chain (cracked solder joint, dead chip opening the CO→CI path) on a 76- or 114-chip board.
• PIC fault — the S19 series still uses a PIC (PIC16F1704, U3 on the S19 / U6 on the S19 Pro). A failed or mis-programmed PIC stops voltage enable; reprogramming is a documented repair.
• Boost-module failure (14 V→19 V on the S19, 12.6 V→20 V on the S19 Pro) — replaceable boost-module boards exist.
• Amlogic firmware lock (S19 XP / S19K Pro after March 2024) — not a hardware fault; requires the correct unlock path before custom firmware.

Flat-rate, transparent repair pricing (CAD) and the honest "when we will tell you NOT to repair" call: ASIC Repair Pricing → · Book an ASIC repair →

Get one — or get yours repaired

• Antminer S19j Pro+ (in stock)
• Antminer S19 Loki Edition — 110 V quiet home build
• Replacement hashboard for Antminer S19j Pro
• Buy ASIC miners in Canada — current S19/S21 stock

We are not Amazon. Miners are built to order and refurbished on our own Laval bench since 2016 — lead times are honest estimates, not promises.

Open firmware for the Antminer S19?

DCENT_OS is D-Central's closed beta open-source firmware (GPL-3.0, experimental firmware, not production-ready; it can brick your miner). For the Antminer S19 family it is in active development; planned to follow the S9, one validated control board at a time. Waitlist only, never a pre-order. DCENT_OS beta status → It stands on the shoulders of the open community — Braiins (autotuning, Stratum V2), CGMiner, skot and OSMU.

Frequently asked questions