Product Overview

The Bitmain Antminer S23 318Th is a next-generation flagship-class Bitcoin (BTC) SHA-256 ASIC miner from Bitmain, delivering an exceptional 318 terahashes per second at approximately 12.5 J/TH efficiency. The S23 series represents a significant advancement beyond the S21 generation, incorporating Bitmain’s latest chip architecture to push Bitcoin mining efficiency to new levels in the air-cooled segment.

At 318 TH/s, the S23 318Th delivers approximately 30% more hashrate than the S21 Pro 245Th while achieving substantially better energy efficiency (12.5 J/TH vs ~15.5 J/TH). This combination of higher hashrate and improved efficiency makes the S23 the most competitive single-unit air-cooled Bitcoin miner Bitmain has produced at the time of this writing, positioning it as the hardware of choice for operators building or upgrading commercial mining operations in 2025–2026.

For South African operators with commercial power infrastructure, the S23 318Th represents the state-of-the-art in air-cooled Bitcoin mining hardware — a meaningful upgrade from S21, S21 Pro, or S21+ class machines in terms of both hashrate and operating efficiency.

Key Features

• 318 TH/s hashrate: Bitmain’s highest air-cooled Bitcoin mining output in the S23 series — approximately 30% more hashrate per unit than the S21 Pro 245Th, reducing the number of machines needed for any target output.
• ~12.5 J/TH efficiency: At approximately 3975W, the S23 318Th operates at an exceptional ~12.5 J/TH — significantly better than S21-era hardware and among the best efficiency figures available for air-cooled Bitcoin miners.
• Air-cooled design: Standard industrial ASIC enclosure with high-performance fans. No hydro loop, pump, or specialist cooling infrastructure required — the S23 achieves near-hydro efficiency in a standard air-cooled form factor.
• SHA-256d algorithm: Mines Bitcoin (BTC), Bitcoin Cash (BCH), and Bitcoin SV (BSV). Bitcoin is the primary and most valuable target for SHA-256 mining hardware.
• Next-generation Bitmain chip architecture: The S23 series benefits from Bitmain’s most advanced chip node available at time of release, achieving efficiency levels that meaningfully reduce operating costs per terahash compared to S21-generation hardware.
• Ethernet (RJ-45) connectivity: Single wired port for pool communication. Standard Antminer web interface for configuration and monitoring.
• Maximum hash density per rack: At 318 TH/s, an S23 farm achieves the same total output with fewer units than any previous Bitmain air-cooled generation, reducing infrastructure complexity, management overhead, and floor space requirements.

Technical Specifications

• Algorithm: SHA-256d
• Supported coins: Bitcoin (BTC), Bitcoin Cash (BCH), Bitcoin SV (BSV)
• Hashrate: 318 TH/s (±3%)
• Power consumption: ~3975W (±5%) at 25°C ambient
• Power efficiency: ~12.5 J/TH (±5%)
• Cooling type: Air-cooled, dual high-speed fans
• Noise level: ~75 dB(A)
• Input voltage: 200–240V AC
• Networking: Ethernet (RJ-45)
• Operating temperature: 5°C to 40°C
• Dimensions (L×W×H): 400 × 195 × 290 mm (approximate)
• Net weight: ~16 kg

Power & Installation Notes

South Africa’s 230V/50Hz supply is within the Antminer S23 318Th’s 200–240V input range. No voltage converter is required.

At approximately 3975W, the S23 318Th is one of the higher-wattage miners in our catalogue. A dedicated 32A circuit, installed by a registered electrician, is the minimum requirement for single-unit continuous operation. For commercial deployments with multiple S23 units, a dedicated distribution board with individual 32A circuit breakers per unit and appropriate cable sizing for sustained ~4 kW per unit is essential. Engage a qualified industrial electrician for multi-unit farm installations.

Load shedding at ~4 kW means even a 10kWh residential battery provides only approximately 2.5 hours of operation — insufficient for any meaningful continuous operation during outages. Premium hardware like the S23 demands continuous operation to justify its investment; generators or commercial-grade backup power are therefore not optional for South African operators targeting maximum ROI.

Thermal management: the S23’s high-speed fans must have clear airflow at both faces. Maintain ambient temperature below 40°C with active air extraction in enclosed spaces. Active cooling (air conditioning or evaporative systems) is often necessary in South African summer conditions for enclosed mining rooms.

Electricity Cost Context — South Africa

Running the S23 318Th at 3975W continuously consumes approximately 95.4 kWh per day, or roughly 2 862 kWh per month. At R2.80/kWh (reference residential tariff — municipal rates vary), the estimated monthly electricity cost is approximately R8 014 per month.

Calculation: (3975 ÷ 1000) × 24 × 30 × R2.80 = ~R8 014/month.

At 12.5 J/TH, the S23 318Th produces considerably more Bitcoin per rand of electricity than any S21-generation machine. For South African operators on commercial or industrial tariffs, this efficiency improvement significantly changes the operating economics relative to older hardware. Standard residential tariffs still make this a high operating cost — commercial electricity access is strongly preferable. This is a cost estimate only.

Ideal Use Cases

• State-of-the-art commercial Bitcoin mining fleets: Operations investing in the latest generation hardware for maximum efficiency, hashrate density, and long-term competitiveness.
• Operators replacing S21 Pro or S21+ hardware: A significant efficiency step-up from the S21 generation — 12.5 J/TH vs 15.5 J/TH — at 30% higher hashrate per unit. Reduces energy cost per BTC mined by approximately 19% versus the S21 Pro 245Th.
• Maximum hashrate density: At 318 TH/s, the S23 minimises the number of machines needed to achieve any target fleet hashrate — ideal for operations with space, power, or management constraints.
• Premium fleet standardisation: Operators who want to deploy the highest-performing available Bitmain hardware for a long productive life ahead of the next generation.
• Commercial power operations: The S23’s economics work best with commercial or industrial electricity tariffs that make the ~R8 014/month running cost viable relative to BTC output.

Frequently Asked Questions

Does the Antminer S23 318Th work on South African power?
Yes. SA’s 230V/50Hz is within the S23’s input range. A dedicated 32A circuit from a registered electrician is required for single-unit installation. ~4 kW is among the highest-wattage single-unit miners in our catalogue.

How does the S23 318Th compare to the S21 Pro 245Th?
The S23 delivers 318 TH/s at 12.5 J/TH vs 245 TH/s at 15.5 J/TH for the S21 Pro. That’s +30% hashrate and ~19% better efficiency. The S23 is a clear generational upgrade for operations that can support the higher unit cost. See: Bitmain Antminer S21 Pro 245Th.

What Bitcoin pools are compatible with the S23 318Th?
All major SHA-256 Bitcoin pools: Foundry USA Pool, AntPool, F2Pool, ViaBTC, Braiins Pool. Standard Stratum protocol. Configuration via the Antminer web interface.

Is this a future/pre-order product?
The S23 318Th is a newer product and stock may be subject to international supplier lead times. Confirm current in-stock status and delivery timeline with Sell Your PC before ordering.

How does load shedding impact the S23’s investment case?
At ~4 kW, every hour of load shedding reduces BTC output by approximately 1/24th of your daily expected output. At Stage 6 (8+ hours/day), effective uptime drops to ~67%. A reliable backup power solution is essential to maximise ROI on premium hardware like the S23.

What’s Included

• 1× Bitmain Antminer S23 318Th ASIC miner unit
• Integrated PSU (confirm with order)
• Power cable (region-specific — South African plug may require local adaptor or electrician wiring)
• Ethernet cable not included
• Quick-start guide