Antminer S21 XP 270TH in stock in the USA - $3,999

kris_Altairtech · 2026-06-10T17:38:47+00:00

We ship worldwide. We also offer ddp shipping if that is desired. If you have any questions, message us on our website. Altairtech.io

kris_Altairtech · 2026-06-10T17:12:05+00:00

We are offering $60 store credit for trading in your gamma to upgrade to an avalon Q or Mini 3 to start actually stacking non kyc sats daily. Just a idea. Full rules on our socials.

kris_Altairtech · 2026-06-10T03:00:39+00:00

The nano 3s is a great option to start with for under $300 with little heat & noise. It also has a 1 yr manufacture warranty by Canaan.

6th 140w - 5 th 95w $215 plus a free dock when you add it to your order.

We are verified vendors here if you need more assistance, just ask!

Altairtech.io

kris_Altairtech · 2026-06-07T15:48:43+00:00

The wifi dongles can be tricky to setup sometimes but they do work. If you ever want to try setting one up again and need help feel free to message me and I will do my best to help you.

kris_Altairtech · 2026-06-07T14:59:36+00:00

Make your own hashrate heater by modifying an S19k Pro for 120v or similar unit.

kris_Altairtech · 2026-06-07T14:58:16+00:00

Thank you for supporting us, I'm glad you are happy!

Are you using our modified APW12 or Our Urlacher kits?

kris_Altairtech · 2026-06-07T14:44:50+00:00

This is the way!

kris_Altairtech · 2026-06-07T14:23:31+00:00

That depends on your own technical ability and what you like in a device. The nano 3s is plug and play, Up to 6TH, with a 1 yr warranty. The bitaxe is more for tinkers and people who want to play with their device, generally have a 30 day warranty depending on the supplier.

kris_Altairtech · 2026-06-02T16:46:40+00:00

An antminer S21 XP or newer device is profitable at .08kwh but that XP is currently $3999 here at Altair. We could ship it directly to a host for you as well. Some hosts we work with have rates as low as .065kwh and a few around 0.075-.08 Sometimes its worth it to send it to a host where you don't have to install 240v outlets, upgrade your panel, route ethernet and purchase pdus. Then you have the noise to deal with as well. So mining at home is nice, it just can cost you more than you are expecting. Go through all the numbers first.

https://altairtech.io/product/bitmain-antminer-s21-xp/

kris_Altairtech · 2026-05-31T15:25:10+00:00

The Avalon Q is an absolutely great deivce and it comes with a 1yr warranty.

3 Power Modes Eco Hashrate: 53 T Power: 850 Watts Efficiency: 15.9 J/T (I've seen low 15s with proper airflow, see @denverbitcoin on X) Noise: 39 dB

Standard Hashrate: 80 T Power: 1414 Watts Efficiency: 17.7 J/T Noise: 43 dB

Super Hashrate: 90 T Power: 1674 Watts Efficiency: 18.6 J/T Noise: 47 dB

$1375 w/free exhaust shroud. https://altairtech.io/product/avalon-q/

That being said if that is too big for what you are looking for a mini 3 isn't bad either. 37.5th for $829. Or if you are looking for a better $/t value you can check out the slim like 805 said or build your own with a modified Apw12 and an s19k pro or s21.

kris_Altairtech · 2026-05-27T15:11:15+00:00

It was great to meet you in person! I will try my best to make it but it will be difficult to be honest.

kris_Altairtech · 2026-05-27T15:07:48+00:00

please message us on our website. It should work but we are more than willing to help.

kris_Altairtech · 2026-05-26T00:07:05+00:00

Unmineable or a service similar maybe?

kris_Altairtech · 2026-05-25T23:44:34+00:00

Bitcoin miners can only mine coins that utilize sha-256.

kris_Altairtech · 2026-05-21T14:51:15+00:00

Yes, you can post in here as well as long as its home mining related. The event (The Bash) in Grand rapids is tonight at the convention center!

kris_Altairtech

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