Bitmain Antminer KS3 (8.3Th) vs Bitmain Antminer KS5 Pro (21Th)
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Bitmain Antminer KS3 (8.3Th) | Specification | Bitmain Antminer KS5 Pro (21Th) |
|---|---|---|
| 8.3 TH/s | Hashrate | 21.0 TH/s |
| 3,188 W | Power Consumption | 3,150 W |
| 384.1 J/TH | Efficiency | 150.0 J/TH |
| — | Noise Level | 75 dB |
| — | Weight | 15.8 kg |
| 10,878 BTU/hr | BTU Output | 10,748 BTU/hr |
| 22/100 | Home Mining Score | 36/100 |
| — | Release Year | — |
| KHeavyHash | Algorithm | KHeavyHash |
| Bitmain | Manufacturer | Bitmain |
Profitability Comparison
Bitmain Antminer KS3 (8.3Th)
Bitmain Antminer KS5 Pro (21Th)
Based on BTC price of $74,178 and current network difficulty as of Mar 16, 2026. Actual results vary.
Verdict
Based on specs, the Bitmain Antminer KS5 Pro (21Th) offers 61% better efficiency at 150.0 J/TH compared to the Bitmain Antminer KS3 (8.3Th) at 384.1 J/TH. This directly impacts daily operating costs and long-term profitability.
Best For...
Best for Profitability
TieBoth miners produce similar daily profit.
Best for Home Mining
Bitmain Antminer KS5 Pro (21Th)Score: 36/100. 75 dB noise level.
Best for Efficiency
Bitmain Antminer KS5 Pro (21Th)150.0 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Is the Bitmain Antminer KS3 (8.3Th) or Bitmain Antminer KS5 Pro (21Th) more profitable?
At the current BTC price and a $0.10/kWh electricity rate, the Bitmain Antminer KS5 Pro (21Th) is more profitable at $-6.88/day compared to $-7.38/day for the Bitmain Antminer KS3 (8.3Th). Profitability depends heavily on your electricity rate — use the selector above to calculate with your actual costs.
Which is quieter, the Bitmain Antminer KS3 (8.3Th) or Bitmain Antminer KS5 Pro (21Th)?
The Bitmain Antminer KS5 Pro (21Th) is quieter at 75 dB compared to the Bitmain Antminer KS3 (8.3Th) at 0 dB. For home mining, lower noise levels make a significant difference in livability.
Which is better for home mining, the Bitmain Antminer KS3 (8.3Th) or Bitmain Antminer KS5 Pro (21Th)?
The Bitmain Antminer KS5 Pro (21Th) scores 36/100 on our Home Mining Score (vs 22/100 for the Bitmain Antminer KS3 (8.3Th)). This composite score factors in noise, power requirements, heat output, size, and setup ease — all critical for residential mining.
What is the efficiency difference between Bitmain Antminer KS3 (8.3Th) and Bitmain Antminer KS5 Pro (21Th)?
The Bitmain Antminer KS3 (8.3Th) runs at 384.1 J/TH while the Bitmain Antminer KS5 Pro (21Th) runs at 150.0 J/TH — a difference of 234.1 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs.