Which S19 should I buy used?

Pick by efficiency, not just hashrate. An S19j XP at about 21.5 J/TH costs more to buy but much less to run than an original S19 at about 34 J/TH.

Can I run an S19 at home?

Only with a 200 to 240 V circuit and somewhere the noise and heat are acceptable, such as a garage, basement or outbuilding. Many people add a sound-proof box or ducting.

Which settings do I enter for DirectPool?

In the web interface, Pool 1 URL stratum+tcp://stratum.directpool.io:3333, Worker your bc1 address plus .worker, Password x. Save & Apply.

How much electricity does an S19 use?

An original S19 at 3,250 W uses about 28,500 kWh a year, about 5,700 a year at 0.20 per kWh.

The S21 does about twice the hashrate at roughly 17.5 J/TH. The S19 is far cheaper to buy, so it can make sense with cheap power.

Full-size ASICs

Antminer S19 series (used)

by Bitmain, BM1398

The Antminer S19 is a family of Bitmain industrial miners first sold in 2020. The base S19 does about 95 TH/s at 3,250 W; the S19j Pro about 100 TH/s at 2,950 W; the air-cooled S19j XP about 151 TH/s at 3,247 W. All need 200 to 240 V, Ethernet and a place where 75 dB is acceptable.

Published October 5, 2026. Updated October 5, 2026

Parts of the Antminer S19 series (used), numbered as in the drawing
Item	Part	From the specs
1	Cooling	Four fans, front to back airflow. About 75 dB
2	Case	S19j Pro: 400 x 195.5 x 290 mm, 14.6 kg
3	Hashing chip	Bitmain BM1398 in the original S19; later variants use newer Bitmain chips

Key figures

Hashrate: 95 TH/s
Power: 3250 W
Efficiency: 34.2 J/TH
Price range: $250 to $700

Availability: mostly found used.

Specifications

Hashrate: S19: about 95 TH/s. S19j Pro: about 100 TH/s. S19j XP: about 151 TH/s
Power draw: S19: about 3,250 W. S19j Pro: about 2,950 W. S19j XP: about 3,247 W
Efficiency: About 34 J/TH (S19), 29.5 J/TH (S19j Pro), 21.5 J/TH (S19j XP)
Chip: Bitmain BM1398 in the original S19; later variants use newer Bitmain chips
Cooling and noise: Four fans, front to back airflow. About 75 dB
Connectivity: Ethernet (RJ45, 10/100 Mbit/s) only
Power supply: Built-in PSU, 200 to 240 V AC. Will not run on 110 to 120 V
Size and weight: S19j Pro: 400 x 195.5 x 290 mm, 14.6 kg
Open source: No. Third-party firmware such as Braiins OS is available
Release year: 2020 (later variants up to 2023)
Firmware: Bitmain stock firmware, or third-party firmware

Good and less good

Good

Lots of hashrate for the money on the used market.
Much more efficient than an S9, and widely supported by repair shops and third-party firmware.
Built-in power supply: one machine, one power cable.

Less good

Loud: about 75 dB. Not for living spaces.
About 26,000 to 28,500 kWh a year. Electricity usually decides whether it pays off.
Needs a 200 to 240 V circuit rated for about 3 kW continuous.
Used units vary: check hashboards, fans and the exact model before paying.

Set it up on DirectPool

Every S19 variant is configured from the web page at its IP address, found through your router. There is no screen or WiFi.

Type exactly this

Pool 1 URL: stratum+tcp://stratum.directpool.io:3333
Pool 1 Worker: your_bc1_address.worker_name
Pool 1 Password: x

Choose your mining region

Showing Europe, Lithuania (main server).

Changing the location only changes the address shown above. Copy it into your miner settings and restart or reconnect the miner. Miners already connected stay where they are. Every server mines the same pool, with the same payouts.

Browser ping, measured live from this page

Europe, Lithuania...

North America, Chicago...

Asia, Jakarta...

This measures your browser connection, not your miner or the full relay-to-pool path.

Replace your_bc1_address with a Bitcoin address you control (bc1 or 3). The part after the dot is a name for this machine, so you can tell your miners apart. Addresses starting with 1 are not accepted.

1.Connect the miner to your router with a network cable. Antminers have no WiFi.
2.Find its IP address in your router's device list (or with Bitmain's IP Reporter tool and the IP Report button on the control board).
3.Open that address in a browser on the same network and log in. The default username and password are both root.
4.Open the pool settings page (Miner Configuration on older firmware, Settings or Pool on newer).
5.Enter the values above in Pool 1. Pools 2 and 3 are backups.
6.Click Save & Apply (or Save). The miner restarts its mining process; hashrate shows on the status page after a few minutes.

Common mistakes

Leaving out stratum+tcp:// or :3333. The Antminer URL field takes the full address.
Keeping the default root password. Change it, since anyone on your network could otherwise redirect your hashrate.
Typing the Bitcoin address by hand in the Worker field. Copy and paste it.
Plugging it into a normal household circuit without checking the load. These machines draw well over a kilowatt non-stop.
Trying to run it on a 110 to 120 V outlet. The S19 needs 200 to 240 V; in North America that means a 240 V circuit like an electric dryer's.
Buying a hydro (liquid-cooled) S19 XP Hyd. by mistake. It needs a water-cooling system and often 380 V three-phase power.

After a few minutes, paste your address on the pool page to see the machine. Small miners can take a while to send their first share.

Your odds with this miner

Miner95 TH/s

Network difficulty: Loading
DirectPool, 1 h avg: Loading
Next block value: Loading

Chance of finding at least one block, with 95 TH/s

	Solo	With DirectPool
Per day
Per month
Per year

If DirectPool finds a block, this miner would get about

These are chances, not schedules. Hashing has no memory: a miner that has not found a block is not closer to one. Open the full calculator

Electricity cost

Running all year at about 3,250 W, the Antminer S19 series (used) uses about 28,490 kWh a year.

Price per kWh	Per year	Per month
0.10	2,849	237
0.20	5,698	475
0.30	8,547	712

Same currency as your electricity price (dollars, euros, pounds). Real draw depends on firmware settings and frequency.

Where to buy

Bitmain (official store, newer variants)Ships to: Worldwide (official store)
Braiins Store (Bitmain miners)Ships to: Worldwide
BT-MinersShips to: Worldwide
Maxi MinersShips to: EU (Czech Republic)

Typical price $250 to $700, checked October 5, 2026. Prices move, check the store. Plain store links. We earn nothing from them.

Questions

Which S19 should I buy used?: Pick by efficiency, not just hashrate. An S19j XP at about 21.5 J/TH costs more to buy but much less to run than an original S19 at about 34 J/TH.
Can I run an S19 at home?: Only with a 200 to 240 V circuit and somewhere the noise and heat are acceptable, such as a garage, basement or outbuilding. Many people add a sound-proof box or ducting.
Which settings do I enter for DirectPool?: In the web interface, Pool 1 URL stratum+tcp://stratum.directpool.io:3333, Worker your bc1 address plus .worker, Password x. Save & Apply.
How much electricity does an S19 use?: An original S19 at 3,250 W uses about 28,500 kWh a year, about 5,700 a year at 0.20 per kWh.
S19 or S21?: The S21 does about twice the hashrate at roughly 17.5 J/TH. The S19 is far cheaper to buy, so it can make sense with cheap power.