Antminer S19j Pro vs. S19k Pro – which one fits you?

S19j Pro vs S19k Pro head to head: price, hashrate, watts, J/TH, daily electricity cost and shipping – both used, from German stock.

Short answer: S19j Pro or S19k Pro?

Both miners are used, air-cooled Bitmain devices from the S19 series, tested under load, from German stock. The Antminer S19j Pro has the lower purchase price (€329 / €319 / €299 at 1 / 3 / 10 units). The Antminer S19k Pro has the better efficiency (23 J/TH instead of 29.5 J/TH) and more hashrate (115 TH/s instead of 104 TH/s) at lower power draw (2,645 W instead of 3,068 W).

Which one fits better depends mainly on your electricity price, daily runtime and budget. There is no general winner, and output changes daily with the Bitcoin price and difficulty. This guide compares only purchase price, specs and electricity cost – for the whole series see the Antminer S19 comparison.

Comparison table: S19j Pro vs S19k Pro

All values come from our catalog. Electricity cost = kWh × electricity price at 24 hours of continuous operation; they show costs only, not earnings.

Price 1 unit: S19j Pro €329 | S19k Pro €449
Price 3 units (per unit): S19j Pro €319 | S19k Pro €439
Price 10 units (per unit): S19j Pro €299 | S19k Pro €419
Hashrate: S19j Pro 104 TH/s | S19k Pro 115 TH/s
Power draw: S19j Pro 3,068 W | S19k Pro 2,645 W
Efficiency: S19j Pro 29.5 J/TH | S19k Pro 23 J/TH
Price per TH (1 unit): S19j Pro €3.16 | S19k Pro €3.90
Price per TH (10 units): S19j Pro €2.88 | S19k Pro €3.64
Energy use per day (24 h): S19j Pro 73.63 kWh | S19k Pro 63.48 kWh
Electricity cost per day at 20 ct/kWh: S19j Pro €14.73 | S19k Pro €12.70
Electricity cost per day at 30 ct/kWh: S19j Pro €22.09 | S19k Pro €19.04
Electricity cost per TH and day at 20 ct/kWh: S19j Pro 14.2 ct | S19k Pro 11.0 ct
Electricity cost per TH and day at 30 ct/kWh: S19j Pro 21.2 ct | S19k Pro 16.6 ct
Shipping within Germany: S19j Pro €19.90, free from €1,000 order value | S19k Pro free
Delivery time: S19j Pro 48 hours (business days) | S19k Pro 48 hours (business days)

When does the Antminer S19j Pro fit?

With cheap electricity, for example from solar surplus, the purchase price weighs more than power consumption. The S19j Pro costs €3.16 per TH (single-unit price) or €2.88 at 10 units, which is below the S19k Pro (€3.90 or €3.64). See also Buy Antminer S19j Pro.

Cheap or solar-supported electricity: the lower purchase price counts for more.
Lower budget or starting out with a few devices.
Not around the clock: if the miner only runs when there is surplus, the efficiency advantage shrinks.

When does the Antminer S19k Pro fit?

With more expensive electricity and around-the-clock operation, efficiency counts. The S19k Pro has 11.0 ct electricity cost per TH and day at 20 ct/kWh, the S19j Pro 14.2 ct; at 30 ct/kWh it is 16.6 ct versus 21.2 ct. Shipping within Germany is also free. See Buy Antminer S19k Pro.

More expensive electricity (e.g. commercial or household tariff): lower cost per TH.
24/7 operation: the efficiency advantage applies every day.
Less power per device: lower load on the circuit, heat and cooling.

Noise, connection and firmware

Both models are air-cooled Antminers from the S19 series with several fans; the noise level is in the same range and not suitable for living spaces. For the connection, the same applies to both: a dedicated, adequately rated circuit, installed by a qualified electrician. By calculation the S19j Pro draws about 13.3 A at 230 V, the S19k Pro about 11.5 A.

Firmware-wise both are in the same position: Braiins OS+ is an alternative firmware for supported Antminers; current compatibility and terms are listed on braiins.com. The steps are in the guide Install Braiins OS.

Run the numbers yourself

Whether a device makes sense for you depends on the Bitcoin price, difficulty, electricity price and runtime, and changes daily. In the Bitcoin mining calculator you can check both models with your electricity price as an example calculation. The result is an example calculation based on the assumptions you enter, not a guarantee of earnings.

Frequently asked questions

What is the difference between the Antminer S19j Pro and the S19k Pro? Both belong to Bitmain's S19 series and are air-cooled. The S19j Pro delivers 104 TH/s at 3,068 W (29.5 J/TH), the S19k Pro 115 TH/s at 2,645 W (23 J/TH). The S19k Pro is therefore more efficient and has more hashrate at lower power draw; the S19j Pro is cheaper to buy.

What do the used S19j Pro and S19k Pro cost? The S19j Pro costs €329 / €319 / €299 per unit at 1 / 3 / 10 units, the S19k Pro €449 / €439 / €419. Per TH (single-unit price) that is €3.16 for the S19j Pro and €3.90 for the S19k Pro.

How high is the electricity cost per day? In continuous operation the S19j Pro uses 73.63 kWh per day, the S19k Pro 63.48 kWh. At 20 ct/kWh that is €14.73 and €12.70 per day, at 30 ct/kWh €22.09 and €19.04 per day (electricity cost = kWh × price). These are electricity costs only, not earnings.

Is the S19k Pro worth the extra cost? Bought singly, the S19k Pro costs €120 more than the S19j Pro, but offers more hashrate and needs less power per TH (23 J/TH instead of 29.5 J/TH). Whether that makes sense for you depends on your electricity price, daily runtime, the Bitcoin price and difficulty. No blanket statement or earnings promise is possible – run the numbers with your own values in the live calculator.

What does shipping within Germany cost? Antminer S19k Pro: shipping within Germany free. Antminer S19j Pro: €19.90, free from €1,000 order value. Free shipping for the S19k Pro applies when the cart contains only free-shipping products; prices for other countries are shown at checkout.

Can I use Braiins OS+ on both? Braiins OS+ is an alternative firmware for supported Antminers. Which control board versions are currently supported and the current terms (Braiins OS+ charges a small pool/developer fee) are listed on braiins.com. On request we install the firmware before shipping; the guide “Install Braiins OS” explains the steps.

Offers: Buy Antminer S19j Pro, Buy Antminer S19k Pro and Buy Antminer S19 Pro. Further reading: Antminer S19 comparison and Install Braiins OS.

Facts about buying from Mining Technologies

Dealer: Mining Technologies (owner: Arthur Reiz), Am Brauhaus 4, 91413 Neustadt an der Aisch, Germany · Since 2021 · over 2,000 miners sold · eBay: 100% positive, 238 items sold (as of 2026-10-15) · 5.0★ Google (43 reviews, as of 2026-10-15)
Contact: Phone +49 179 4382414, WhatsApp on the same number, email info@miningtechnologies.info
Shipping: S19j Pro and S19k Pro: free shipping in Germany · other devices under €1,000: €19.90 · free from €1,000 · EU (incl. Austria) €29.90 · free from €1,000 order value · EU islands €49.00 · Switzerland €40.00 (import duties are paid by the recipient)
Delivery time: S19j Pro and S19k Pro: delivery within 48 hours (business days, Germany) after payment, EU 3–6 business days. Models from our HK warehouse: 10–14 days.
Payment & warranty: Prepayment (bank transfer), PayPal, Apple Pay, Credit card (Mollie), Cryptocurrency (NOWPayments); invoice showing VAT; statutory warranty and 14-day right of withdrawal for consumers