The Antminer S21 Pro, an enhanced version of Bitmain’s Antminer S21, leads the charge in bitcoin mining innovation. It delivers an exceptional hashrate of up to 250 TH/s while consuming only 3,550 watts, setting a new benchmark for efficiency.
Featuring state-of-the-art 5nm chips, the S21 series achieves up to 40% greater efficiency than the S19 model, with the S21 Pro attaining an outstanding 14.2 J/T efficiency rating.
With its superior performance, the Antminer S21 Pro is set to spark intense competition in the bitcoin mining landscape, ushering in a new era in the race for advanced mining technology.
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Specifications
| Brand |
Antminer S21 Pro |
| Model |
S21 Pro |
| Algorithm | Cryptocurrency |
SHA256 | BTC/BCH/BSV |
| Hash Rate |
234TH/s ± 3% |
| Power on wall @25°C, Watt |
3531w ± 5% |
| Power efficiency on wall @25°C, J/TH |
15 ± 5% |
| Power Supply |
With PSU |
| Power supply AC Input voltage, Volt(1-1) |
200~240 |
| Power supply AC Input Frequency Range, Hz |
47~63 |
| Power supply AC Input current, Amp(1-2) |
20(1-3) |
| Networking connection mode |
RJ45 Ethernet 10/100M |
| Miner Size (Length*Width*Height, w/o package),mm(2-1) |
400*195.5*290 |
| Miner Size (Length*Width*Height, with package),mm |
570*316*430 |
| Net weight, kg(2-2) |
14.2 |
| Gross weight, kg |
16.0 |
| Operation temperature,°C |
0~40 |
| Storage temperature,°C |
-20~70 |
| Operation humidity(non-condensing) , RH |
10~90% |
| Operation altitude, m(3-1) |
≤2000 |
| Warranty |
2 years |
Important Information for Your Purchase
Everything you need to know to shop with confidence:
Only logged in customers who have purchased this product may leave a review.
Last updated May 30, 2025
This Shipping & Delivery Policy is part of our Terms of Use ("Terms") and should be therefore read alongside our main Terms: https://www.cryptominerex.com/terms-of-use/.
Please carefully review our Shipping & Delivery Policy when purchasing our products. This policy will apply to any order you place with us.
What Are My Shipping Delivery Options?
Free Shipping
We offer free Standard shipping on all orders.
Do You Deliver Internationally?
We offer worldwide shipping. Free Standard shipping is valid on international orders.
Buyers are responsible for customs delays or returns due to incomplete documentation. We strongly recommend reviewing local customs policies and preparing all required documentation in advance to avoid delays or additional costs.
For information about customs process:
Please note, we may be subject to various rules and restrictions in relation to some international deliveries and you may be subject to additional taxes and duties over which we have no control. If such cases apply, you are responsible for complying with the laws applicable to the country where you live and will be responsible for any such additional costs or taxes.
Are There Other Shipping Restrictions?
- Orders cannot be shipped to P.O. boxes.
- Not all shipping methods are available for certain countries.
- We ship using UPS. For some countries, we will use EMS.
- Usually, we don't support customers to specify the express way.
- Orders only ship on business days, which are Monday - Friday.
- To ensure same-day delivery, order must be placed by 5pm EST.
- Shipments to APO/FPO addresses require additional processing time after delivery to the military post office.
What Happens If My Order Is Delayed?
If delivery is delayed for any reason we will let you know as soon as possible and will advise you of a revised estimated date for delivery.
For EU and UK consumers: This does not affect your statutory rights. For more information please refer to our Terms: https://www.cryptominerex.com/terms-of-use/.
How Can You Contact Us About This Policy?
If you have any further questions or comments, you may contact us by:
Last updated May 30, 2025
Thank you for your interest in the products and services of CryptoMinerEX.
This Limited Warranty applies to physical goods, and only for physical goods, purchased from CryptoMinerEX (the "Physical Goods").
What does this limited warranty cover?
This Limited Warranty covers any defects in material or workmanship under normal use during the Warranty Period.
During the Warranty Period, CryptoMinerEX will repair or replace, at no charge, products or parts of a product that proves defective because of improper material or workmanship, under normal use and maintenance.
What will we do to correct problems?
CryptoMinerEX will either repair the product at no charge, using new or refurbished replacement parts.
Who Bears the Shipping Costs?
For repairs within the warranty period, CryptoMinerEX will cover the round-trip shipping costs. For repairs beyond the warranty period, the user is responsible for the shipping costs.
How long does the coverage last?
The Warranty Period for Physical Goods purchased from CryptoMinerEX is 2 years from the date of purchase.
A replacement Physical Good or part assumes the remaining warranty of the original Physical Good or 2 years from the date of replacement or repair, whichever is longer.
What If the Warranty Period Has Expired?
For products beyond the warranty period, we still offer repair services. However, you will be responsible for any repair service fees (if applicable) and the round-trip shipping costs.
What does this limited warranty not cover?
The warranty applies only to the original purchaser who bought directly from CryptoMinerEX. Upon resale, warranty responsibility transfers to the reseller.
This Limited Warranty does not cover any problem that is caused by:
- conditions, malfunctions or damage not resulting from defects in material or workmanship
What do you have to do?
To obtain warranty service, you must first contact us to determine the problem and the most appropriate solution for you.
Last updated June 10, 2025
Thank you for your purchase. We hope you are happy with your purchase. However, if you are not completely satisfied with your purchase for any reason, you may return it to us for a refund, store credit, or an exchange. Please see below for more information on our return policy.
Returns
All returns must be postmarked within seven (7) days of the signing date. All returned items must be in like-new condition, having undergone only minimal testing necessary to verify functionality, with all original tags, labels, and packaging included.
Return Process
To return an item, please email customer service at info@cryptominerex.com to obtain a Return Merchandise Authorization (RMA) number. After receiving an RMA number, place the item securely in its original packaging and the return form provided, then mail your return to the following address:
CryptoMinerEX
Attn: Returns
RMA #
845 S Los Angeles St
Los Angeles, CA 90014
United States
Please note, you will be responsible for all return shipping charges. We strongly recommend that you use a trackable method to mail your return.
Exchanges
We encourage you to consider an exchange as an alternative to a return if your mining machine has an issue.
You may exchange for the same model, or opt for a higher or lower model, with any price difference refunded or charged accordingly. Please note that exchanges for miners using a different algorithm (e.g., a Bitcoin miner for a Litecoin miner) are not supported.
The exchange process is similar to the return process, but with all the shipping costs covered by CryptoMinerEX.
Additionally, as a gesture of appreciation, you will receive a coupon equivalent to 10% of the total order value, redeemable on your next purchase.
Refunds
After receiving your return and inspecting the condition of your item, we will process your return or exchange. Please allow at least fourteen (14) days from the receipt of your item to process your return or exchange. We will notify you by email when your return has been processed.
Exceptions
The following items cannot be returned or exchanged:
Unless otherwise specified, all products sold by CryptoMinerEX are brand new.
For defective or damaged products, please contact us at the contact details below to arrange a refund or exchange: info@cryptominerex.com
Please Note:
- A 2% restocking fee will be charged for all returns in excess of $100,000.
- No returns for non-quality issues.
- Customers are required to confirm the return address with CryptoMinerEX before returning the product.
Questions
If you have any questions or comments about our return policy, you may contact us at:
brocksellsgp (verified owner) –
fast shipment, Recommend
jamesbrunet (verified owner) –
responsive seller, recommended seller!
btcprod (verified owner) –
Thanks!!! very nice!!
mawalichor (verified owner) –
responsive seller, Strongly recommend!
rennychj (verified owner) –
Works great, will buy again
pcmanquebec (verified owner) –
Got it. Works OK.
renisans84 (verified owner) –
fast shipping and delivery, Recommend to all!
e.ilusha (verified owner) –
responsive seller, Recommend
rjl (verified owner) –
very nice packed !!! a lot better then others supplier i\’m happy
seadoo (verified owner) –
The hash rate is solid, and it’s quieter than I expected for its power.
vivet82 (verified owner) –
Excellent service and communication. Quick delivery
mikedennison (verified owner) –
My miner arrived in 6 days, well-packaged with foam padding.
antoineraymond007 (verified owner) –
good seller will order again
densl (verified owner) –
perfect! recommended
loganmcdonald (verified owner) –
Fast Shipping, will order again
gaddafi (verified owner) –
fast shipment, recommended seller.
rlacroix464 (verified owner) –
Perfect! will buy again
iamgurman (verified owner) –
Great seller. all good, thx
kmm4000144 (verified owner) –
Fast Shipping, recommended reseller.
ali (verified owner) –
Good seller! thanks a lot
mikeazaslavsky (verified owner) –
Good product! I recommend this seller!.
ron7684 (verified owner) –
Fast delivery and good quality, thank you
andy8bitman (verified owner) –
It\’s amazing, I\’ve bought it in different stores, this item is the best price, this is my fourth one, Working perfectly already has more than 2 weeks, recommend,
acerminer777 (verified owner) –
The website’s comparison tool helped me pick the right model.