The Bitmain Antminer KS3 9.4Th is a powerful ASIC miner designed for mining cryptocurrencies that use the kHeavyHash algorithm, particularly Kaspa (KAS). Released in October 2023, this mining rig delivers a maximum hashrate of 9.40 Th/s while consuming 3,500 watts of power. As the crypto mining landscape evolves, understanding the real-world profitability, efficiency, and market positioning of hardware like the KS3 is crucial for both novice and experienced miners.
This in-depth review explores the performance metrics, cost-efficiency, and current market dynamics surrounding the Antminer KS3, helping you determine whether it remains a viable investment in 2025.
Performance and Efficiency Metrics
The Antminer KS3 stands out for its high hashrate relative to other kHeavyHash miners. With a rated output of 9.40 terahashes per second (Th/s), it competes directly with newer-generation Kaspa-specific mining rigs. However, its power draw of 3,500W places significant demands on electricity resources, making energy cost a critical factor in profitability.
Operating within a temperature range of 5–40°C and weighing 16.1 kg, the KS3 is built for industrial environments. Its dual-fan cooling system keeps noise levels at approximately 75 dB, which is relatively loud—ideal for remote mining farms rather than residential setups.
👉 Discover how to maximize returns from high-efficiency mining rigs like the KS3.
Current Mining Profitability
As of now, mining profitability for the Antminer KS3 is under pressure due to fluctuating coin values and rising network difficulty.
At a global average electricity rate of $0.10 per kWh**, the daily operational cost reaches **$8.40. Meanwhile, daily revenue from mining Kaspa (KAS) at a price of $0.076302 per coin** generates approximately **$3.56—resulting in a net loss of $4.84 per day.
| Metric | Value |
|---|---|
| Daily Revenue (KAS) | 46.62 KAS ($3.56) |
| Daily Power Cost | $8.40 |
| Net Daily Profit | –$4.84 |
Even alternative kHeavyHash coins like Sedra (SDR) fail to offset these losses, yielding only $2.77 in SDR**, leading to an even steeper deficit of **–$5.63 per day.
Given these figures, the KS3 ranks #269 in profitability among all ASIC miners tracked on major comparison platforms—a clear indicator that it may no longer be competitive in today’s market without access to ultra-low-cost electricity.
Where to Buy the Antminer KS3
Despite declining profitability, several vendors continue to list the Antminer KS3 for sale across global markets. Prices vary dramatically based on region and availability.
- ApextoMining (China) – $1,050.00 (Lowest listed price)
- X-ON MINING (China) – $4,398.00
- CoolDragon (China) – $4,400.00
- Safety Miner (USA) – $4,429.00
- MaxiMiners (Czech Republic) – $4,499.00
- BT-Miners (USA) – $5,999.00
- MineShop (Ireland) – $8,587.32
- NHASH (Hong Kong) – $13,199.00
- ASIC Market Place (Hong Kong) – $13,999.00
- Miner Bros (Hong Kong) – $14,099.00
- MillionMiner (Germany) – $15,300.00
- Coin Mining Central (UK) – $18,500.00
While ApextoMining offers the most competitive entry point at just over $1,000, the wide price disparity suggests limited standardization and potential risks related to shipping, warranty, or authenticity when purchasing from third-party sellers.
👉 Compare current pricing trends and find reliable sources for next-gen mining hardware.
Technical Specifications Overview
| Specification | Detail |
|---|---|
| Manufacturer | Bitmain |
| Model | Antminer KS3 9.4Th |
| Release Date | October 2023 |
| Algorithm | kHeavyHash |
| Hashrate | 9.40 Th/s (±10%) |
| Power Consumption | 3,500 W (±10%) |
| Dimensions | 430 × 290 × 195 mm |
| Weight | 16.1 kg |
| Noise Level | 75 dB |
| Cooling | Dual fans |
| Network Interface | Ethernet |
| Operating Temperature | 5–40°C |
| Humidity Tolerance | 10–90% |
These specs reflect a machine optimized for raw performance but not necessarily energy efficiency—a growing concern as environmental regulations and energy costs tighten worldwide.
Mining Kaspa: Pools and Setup Tips
To mine Kaspa effectively with the Antminer KS3, users must connect to a compatible mining pool. Popular options include:
- Kaspa Pool
- Poolin
- 2Miners
- Kaspa United
When configuring your miner:
- Use accurate stratum URLs provided by your chosen pool.
- Set static IP or DHCP based on your network setup.
- Monitor firmware updates via Bitmain’s official support channels.
- Ensure stable internet connectivity and adequate cooling.
Optimizing firmware settings can slightly improve efficiency, though gains are typically marginal on mature hardware like the KS3.
Frequently Asked Questions (FAQ)
Is the Bitmain Antminer KS3 still profitable in 2025?
No, under standard electricity rates ($0.10/kWh), the KS3 operates at a loss of **$4.84 per day**. Profitability depends heavily on access to cheap power (<$0.03/kWh) or future increases in KAS value.
How much Kaspa does the KS3 mine daily?
At current network conditions, the Antminer KS3 mines approximately 46.62 KAS per day before electricity costs.
Can I mine other coins with the Antminer KS3?
Yes, any cryptocurrency using the kHeavyHash algorithm is compatible, including Sedra (SDR). However, none currently offer better returns than Kaspa.
What is the lifespan of the Antminer KS3?
With proper maintenance and cooling, ASIC miners like the KS3 typically last 2–3 years under continuous operation.
Where can I buy the cheapest Antminer KS3?
The lowest confirmed price is $1,050 from ApextoMining in China. Always verify seller reputation and import fees before purchasing internationally.
Should I upgrade from an older model to the KS3?
Only if you already own significantly less efficient hardware and have access to low-cost electricity. For most users, newer models or alternative investments may offer better ROI.
👉 Explore next-generation mining strategies and platforms for long-term gains.
Final Thoughts
While the Bitmain Antminer KS3 was once a top contender in the Kaspa mining ecosystem, shifting market dynamics have diminished its appeal. High power consumption combined with falling coin values has rendered it unprofitable for most operators.
For those considering entry into kHeavyHash mining, evaluating total cost of ownership—including electricity, cooling, maintenance, and initial investment—is essential. In many cases, reallocating capital toward more efficient hardware or staking-based alternatives might yield superior returns.
Nonetheless, miners with access to sub-$0.05/kWh electricity may still find limited utility in deploying KS3 units at scale—though future upgrades should prioritize energy efficiency over raw hashrate alone.
Core Keywords: Bitmain Antminer KS3, KS3 profitability, Kaspa mining, kHeavyHash miner, ASIC miner 2025, Antminer KS3 specs, mine Kaspa, crypto mining rig