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News & Blog / Release Notes / v24.3.0
Official Release Build #2409.18 · 16 September 2026

Autotuning 24.3: 25% Better Energy Efficiency on S19 Series

Autotuning 24.3 is now live for all Antminer S19 series and Whatsminer M50 devices. This release introduces per-chip dynamic frequency scaling, native Stratum V2 telemetry, and an automated low-power curtailment profile.

Open laptop displaying mining dashboard code on a desk

Release Highlights at a Glance

Efficiency Boost

Up to 25%

Down to 24.2 J/TH on S19 Pro

Network Protocol

Stratum V2

Encrypted, 80% less bandwidth

Silicon Safety

Zero Overvolt

Independent chip-level thermal limits

What's New in Version 24.3

1. Per-Chip Dynamic Undervolting

Instead of running every ASIC chip on a hashboard at a uniform target voltage, Autotuning 24.3 samples individual silicon binning quality in real time. Weaker chips are automatically undervolted and throttled, while resilient chips maintain peak throughput without overheating.

  • ✓ Prevents single-chip thermal runaway errors
  • ✓ Extends hashboard longevity across summer heat waves
  • ✓ Saves 200W–450W per rig at identical hashrate

2. Stratum V2 as Default Protocol

All mining sessions now establish Stratum V2 encrypted tunnels directly to pool endpoints. This eliminates man-in-the-middle hashrate hijacking, shrinks telemetry bandwidth consumption by over 80%, and enables native Job Negotiation.

3. Automated Curtailment & Low Power Mode

When power grid prices spike, firmware can automatically drop into Low Power Mode via API webhook or internal scheduler, bringing power draw down to as low as 1850W while remaining fully connected and hashing.

Hardware Benchmark Targets

Tested in Hashline benchmark laboratories at 25°C ambient air intake:

ASIC Model Stock Specs 24.3 Autotuned Efficiency Gain
Antminer S19 (95T) 95 TH/s @ 3250W (34.2 J/TH) 108 TH/s @ 3000W +22.4%
Antminer S19 Pro (110T) 110 TH/s @ 3250W (29.5 J/TH) 126 TH/s @ 3050W +25.1%
Antminer S19 XP (140T) 140 TH/s @ 3010W (21.5 J/TH) 158 TH/s @ 2880W +18.6%
Whatsminer M50S (126T) 126 TH/s @ 3276W (26.0 J/TH) 138 TH/s @ 3010W +19.2%

Download Packages

Cryptographically signed by Hashline Core Security Key.

hashline-os-24.3-sd.img

SD Card Recovery & Clean Install (48 MB)

Download Image

hashline-os-24.3-upgrade.tar.gz

Web UI Over-the-air Update (32 MB)

Download OTA

SHA-256: e4b87c29...3f18a2

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