Bitmain Antminer KS3 vs Bitmain Antminer KS7
Mining profitability comparison for Kaspa (KAS)
Verdict: Bitmain Antminer KS3 vs Bitmain Antminer KS7
For Kaspa mining, the Bitmain Antminer KS7 is the more efficient choice, delivering roughly 619% more hashrate per watt than the Bitmain Antminer KS3. The Bitmain Antminer KS3 draws 112W less, cutting electricity costs by about $69/year at $0.07/kWh. Bottom line: if power efficiency is your priority, the Bitmain Antminer KS7 is the stronger pick — but confirm with your real electricity rate and current hardware prices below, since acquisition cost ultimately drives ROI.
Specifications
| Spec | Bitmain Antminer KS3 | Bitmain Antminer KS7 |
|---|---|---|
| Type | ASIC | ASIC |
| Algorithm | ||
| Hashrate (KAS) | 9.4 TH/s | 70 TH/s |
| Power Draw | 3188 W | 3300 W |
| Efficiency | 339 J/TH | 47.1 J/TH |
| Supported Coins | KAS | KAS |
| Release Year | N/A | N/A |
Hashrate & Efficiency per Coin
| Coin | Bitmain KS3 HR | Bitmain KS7 HR | Power A | Power B | More Efficient |
|---|---|---|---|---|---|
| KAS | 9.4 TH/s | 70 TH/s | 3188 W | 3300 W | Antminer ✓ |
Daily Electricity Cost at Different Rates
Electricity cost only (not including coin revenue). Lower is better for any given rate.
| Electricity Rate | Bitmain Antminer KS3 | Bitmain Antminer KS7 | Difference |
|---|---|---|---|
| $0.04/kWh | $3.06 | $3.17 | -$0.11 (A cheaper) |
| $0.06/kWh | $4.59 | $4.75 | -$0.16 (A cheaper) |
| $0.07/kWh | $5.36 | $5.54 | -$0.19 (A cheaper) |
| $0.1/kWh | $7.65 | $7.92 | -$0.27 (A cheaper) |
| $0.12/kWh | $9.18 | $9.50 | -$0.32 (A cheaper) |
| $0.15/kWh | $11.48 | $11.88 | -$0.40 (A cheaper) |
| $0.2/kWh | $15.30 | $15.84 | -$0.54 (A cheaper) |
Pros & Cons
Bitmain Antminer KS3
- Lower entry price on the secondary market
- Same Bitmain build quality and support ecosystem
- Good option to test Kaspa mining at lower capital outlay
- Much less efficient than KS5 Pro (339 vs 150 W/TH)
- High power draw relative to hashrate
- Low ROI potential at electricity rates above $0.04/kWh
Bitmain Antminer KS7
- Over 3× the hashrate of the KS5 Pro (70 vs 21 TH/s)
- Dramatically improved kHeavyHash efficiency vs previous generation
- Standard Bitmain form factor — same power and rack infrastructure as S21
- High acquisition cost (~$8,500–$11,000 new)
- Kaspa-only — single-algorithm ASIC with no fallback coin
- High KAS network difficulty growth may compress ROI over time
Frequently Asked Questions
Is the Bitmain Antminer KS3 or Bitmain Antminer KS7 more profitable for Kaspa mining?
Based on hashrate-per-watt efficiency, the Bitmain Antminer KS7 is more efficient for Kaspa mining. However, actual profitability depends on your electricity cost, hardware acquisition price, and coin price — use the live calculator for exact numbers.
What is the power consumption difference between the Bitmain Antminer KS3 and Bitmain Antminer KS7?
For Kaspa mining, the Bitmain Antminer KS3 draws 3188 W while the Bitmain Antminer KS7 draws 3300 W. The Bitmain Antminer KS3 uses 112 W less power, which at $0.07/kWh saves ~$69 per year in electricity.
Can both the Bitmain Antminer KS3 and Bitmain Antminer KS7 mine the same coins?
Yes — both units can mine Kaspa (KAS).
Which unit has a better ROI?
ROI depends on hardware acquisition price, electricity cost, and coin price trajectory. The more efficient unit (better J/TH or hashrate per watt) will generally have a lower operating cost per coin mined, but the absolute ROI timeline is determined by the purchase price. Always model both units in the MiningReturns calculator with your specific electricity rate and current market prices.
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Enter your electricity rate for live earnings estimates on both units.