Antminer S9k (13.5TH/s) – Air-Cooled Bitcoin Miner

Antminer S9k (13.5TH/s) delivers low-cost air-cooled Bitcoin mining on Bitmain’s proven 16nm BM1387 platform — the cheapest practical entry point into SHA-256.

Antminer S9k Overview

The Antminer S9k is the cost-reduced 2019 refresh of the legendary S9. Bitmain did not chase more performance here — it re-engineered the machine for cheaper production: fewer components, simpler boards, lower unit cost. Consequently the S9k delivers effectively identical output to the original S9 at a lower build cost. Moreover, it remains one of the few genuinely affordable ways to own real SHA-256 hashrate.

Key Specifications

• Hashrate: 13.5 TH/s (±5%)
• Power Consumption: ~1310 W (±10%)
• Power Efficiency: ~97 J/TH
• Algorithm/Coins: SHA-256 | BTC, BCH, BSV
• Chip: BM1387, 16nm, 189 chips across 3 hashboards
• Cooling: Dual air-cooled fans
• Noise Level: ~76 dB
• Networking: RJ45 Ethernet 10/100M
• Dimensions: 350 × 158 × 135 mm
• Weight: ~4.2 kg
• Voltage: 11.60 – 13.00 V
• Release Date: August 2019

🛒 Purchasing Guidelines

We accept USD, BTC, ETC, USDC and USDT. Orders ship on a first-paid, first-shipped basis, typically within 10–30 working days. Buyers prepare their own customs documentation.

🚚 Shipping Details

Dispatched from Bitmain distribution in Shenzhen and Hong Kong, with US warehouse support in Texas. Customers handle customs clearance; Certificates of Conformity are provided.

🛡 Warranty

The S9k is a legacy-generation model. Warranty terms are limited and differ from current-generation hardware — confirm coverage before ordering.

⚠️ Buyer Considerations

• At ~97 J/TH this machine only clears its power bill on very cheap electricity — roughly under $0.05/kWh.
• Excellent as a training rig: pool setup, firmware, static IPs, thermal behaviour and PSU sizing for the price of a used phone.
• Noise (~76 dB) requires a garage, shed or outbuilding — not living space.
• For hardware that earns rather than teaches, compare the Antminer S19j Pro at 29.5 J/TH.