Bitmain Antminer S19k Pro vs Bitmain Antminer S21 XP

Mining profitability comparison for Bitcoin (BTC), Bitcoin Cash (BCH)

★ Bitmain Antminer S21 XP is more efficient for Bitcoin mining

Verdict: Bitmain Antminer S19k Pro vs Bitmain Antminer S21 XP

For Bitcoin mining, the Bitmain Antminer S21 XP is the more efficient choice, delivering roughly 91% more hashrate per watt than the Bitmain Antminer S19k Pro. The Bitmain Antminer S19k Pro draws 485W less, cutting electricity costs by about $297/year at $0.07/kWh. Bottom line: if power efficiency is your priority, the Bitmain Antminer S21 XP 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 S19k Pro Bitmain Antminer S21 XP
Type ASIC ASIC
Algorithm
Hashrate (BTC) 120 TH/s 270 TH/s
Power Draw 2760 W 3245 W
Efficiency 23 J/TH 12 J/TH
Supported Coins BTC, BCH BTC, BCH
Release Year N/A N/A

Hashrate & Efficiency per Coin

Coin Bitmain Pro HR Bitmain XP HR Power A Power B More Efficient
BTC 120 TH/s 270 TH/s 2760 W 3245 W S21 ✓
BCH 120 TH/s 270 TH/s 2760 W 3245 W S21 ✓

Daily Electricity Cost at Different Rates

Electricity cost only (not including coin revenue). Lower is better for any given rate.

Electricity Rate Bitmain Antminer S19k Pro Bitmain Antminer S21 XP Difference
$0.04/kWh $2.65 $3.12 -$0.47 (A cheaper)
$0.06/kWh $3.97 $4.67 -$0.70 (A cheaper)
$0.07/kWh $4.64 $5.45 -$0.81 (A cheaper)
$0.1/kWh $6.62 $7.79 -$1.16 (A cheaper)
$0.12/kWh $7.95 $9.35 -$1.40 (A cheaper)
$0.15/kWh $9.94 $11.68 -$1.75 (A cheaper)
$0.2/kWh $13.25 $15.58 -$2.33 (A cheaper)

Pros & Cons

Bitmain Antminer S19k Pro

  • Lower acquisition cost (~$1,200–$1,600 on secondary market)
  • Moderate power draw (2,760 W) — slightly easier infrastructure
  • Widely available on secondary market globally
  • Less efficient than S21 series (23 vs 15–17.5 J/TH)
  • Thinner profitability margins at higher electricity rates
  • Approaching end of competitiveness as newer models dominate

Bitmain Antminer S21 XP

  • Best efficiency among air-cooled SHA-256 ASICs (12 J/TH)
  • 270 TH/s — highest hashrate in the S21 air-cooled lineup
  • Standard air-cooled form factor: no special infrastructure needed beyond dedicated power
  • Highest acquisition cost in the S21 air-cooled range (~$6,000–$7,500)
  • 3,245 W still requires a dedicated 16 A / 220 V circuit
  • Price premium over S21 Pro narrows at lower BTC prices

Frequently Asked Questions

Is the Bitmain Antminer S19k Pro or Bitmain Antminer S21 XP more profitable for Bitcoin mining?

Based on hashrate-per-watt efficiency, the Bitmain Antminer S21 XP is more efficient for Bitcoin 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 S19k Pro and Bitmain Antminer S21 XP?

For Bitcoin mining, the Bitmain Antminer S19k Pro draws 2760 W while the Bitmain Antminer S21 XP draws 3245 W. The Bitmain Antminer S19k Pro uses 485 W less power, which at $0.07/kWh saves ~$297 per year in electricity.

Can both the Bitmain Antminer S19k Pro and Bitmain Antminer S21 XP mine the same coins?

Yes — both units can mine Bitcoin (BTC) and Bitcoin Cash (BCH). You can switch between these coins with a simple pool configuration change.

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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