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 | Taux de hachage | 21.0 TH/s |
| 3,188 W | Consommation électrique | 3,150 W |
| 384.1 J/TH | Efficiency | 150.0 J/TH |
| — | Niveau de bruit | 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 | Algorithme | KHeavyHash |
| Bitmain | Manufacturer | Bitmain |
Profitability Comparison
Bitmain Antminer KS3 (8.3Th)
Bitmain Antminer KS5 Pro (21Th)
Based on BTC price of $78,241 and current network difficulty as of May 16, 2026. Actual results vary.
Verdict
Run the numbers across every spec and the Bitmain Antminer KS5 Pro (21Th) edges it: 6 of 6 factors go its way (efficacité, hashrate, consommation électrique, score de minage domestique, niveau sonore, rapport qualité-prix). The standout gap is 61% better efficacité (384 vs 150 J/TH) in the Bitmain Antminer KS5 Pro (21Th)'s favour. Cross-check the spec deltas and ROI table above against your own electricity rate before deciding.
Spec Deltas
Here is every spec where the Bitmain Antminer KS3 (8.3Th) and Bitmain Antminer KS5 Pro (21Th) actually differ, with the gap quantified:
- Bitmain Antminer KS5 Pro (21Th) 153% more hashrate (8.3 vs 21.0 TH/s)
- Bitmain Antminer KS5 Pro (21Th) 1% better power draw (3,188 vs 3,150 W)
- Bitmain Antminer KS5 Pro (21Th) 61% better efficacité (384 vs 150 J/TH)
- Bitmain Antminer KS3 (8.3Th) 1% more heat output (10,878 vs 10,748 BTU/hr)
- Bitmain Antminer KS5 Pro (21Th) 64% more score de minage domestique (22.0 vs 36.0)
Cost & ROI Over Time
Hardware cost is only half the story — here is how each miner's upfront price plays out against cumulative profit at a $0.10/kWh rate.
| Bitmain Antminer KS3 (8.3Th) | Metric | Bitmain Antminer KS5 Pro (21Th) |
|---|---|---|
| $3,850 | Upfront cost (MSRP) | $860 |
| -$7.35 | Daily net profit | -$6.80 |
| -$6,534 | Net after 1 year | -$3,343 |
| -$9,217 | Net after 2 years | -$5,827 |
| -$11,901 | Net after 3 years | -$8,310 |
| Does not pay back at current rates (negative daily profit) | Payback period | Does not pay back at current rates (negative daily profit) |
Projections assume continuous operation, a flat $0.10/kWh rate, and no hardware degradation, pool fees, or BTC price change. Real-world ROI varies.
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
Which makes more money, the Bitmain Antminer KS3 (8.3Th) or the Bitmain Antminer KS5 Pro (21Th)?
At the current BTC price and a $0.10/kWh electricity rate, the Bitmain Antminer KS5 Pro (21Th) is more profitable at $-6.80/day compared to $-7.35/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.
How far apart are the Bitmain Antminer KS3 (8.3Th) and Bitmain Antminer KS5 Pro (21Th) on J/TH?
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. In relative terms that is 61% better efficacité (384 vs 150 J/TH).