The Antminer T21 integrates the same generation of customized chips found in the Antminer S21, ensuring its proficiency and effectiveness in the domain of SHA256-based cryptocurrency mining. With an impressive hashrate of 190TH/s, it provides unparalleled cost-effectiveness for Bitcoin mining.
Specifications
| Brand |
Antminer T21 |
| Model |
190TH/s @ 3610w |
| Algorithm | Cryptocurrency |
SHA256 | BTC/BCH/BSV |
| Hash Rate |
190 TH/s ± 5% |
| Power on wall @25°C, Watt |
3610 ±5% |
| Power efficiency on wall @25°C, J/TH |
19.0 ±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 |
| Operation temperature,°C |
0~40 |
| Storage temperature,°C |
-20~70 |
| Operation humidity(non-condensing) , RH |
10~90% |
| Operation altitude, m(3-1) |
≤2000 |
| Warranty |
180 days |
Customer Reviews on Trustpilot
Check out what our customers have to say and see other more real customer reviews on our Trustpilot page.
I’ve dealt with other suppliers before, but NiceASICMiner stands out. Their transparency and timely delivery of my Antminer S21 Hyd were impressive. I’ll definitely return for my next upgrade.
Najla Abdulaziz
3 days ago
NiceASICMiner offers a hassle-free experience for miners. Their products are reliable, and their service is consistently excellent.
I’ve been mining for years, and this was my best purchasing experience so far. The Antminer S21 arrived on time and worked perfectly out of the box.
This site is a miner’s dream. I got the Antminer S21 at a great price, and it’s been incredibly efficient. Great customer support as well.
Giorgos Papadimitriou
3 days ago
The Antminer S21 Bitcoin Miner I ordered exceeded expectations! Shipping was prompt, and the device was packaged securely. I’ve been mining for a week now with fantastic results. Customer service was also very responsive when I had a question about the setup.
The entire process was seamless, from browsing to checkout. My Antminer AL1 ALPH Miner arrived safely and is functioning beyond my expectations.
Purchasing Guidelines
- Each user is limited to 500 units.
- If the hashrate does not meet the rated hashrate, a refund will be issued for the corresponding difference in hashrate.
- The pictures shown are for reference only; the final shipment version shall prevail.
Shipping Details
- The products are made in China.
- Shipmens will be scheduled on a first-paid-first-ship basis for orders on which NiceAsicMiner has received full payment.
- You are responsible for any customs delays or returned shipments due to a lack of proper documentation. It's highly recommended to be aware of local customs clearance policies and to prepare all customs documentation ahead of time to avoid any customs clearance delays or unexpected costs.
Warranty
- A 180-day warranty period is provided starting from the shipping date. NiceAsicMiner will cover shipping costs when shipping a replacement unit within the warranty period.
- The warranty only applies to the original purchaser who purchased the machine directly from NiceAsicMiner. Once the miner is resold, warranty coverage becomes the responsibility of the re-seller.
- Please check NiceAsicMiner Buyer Protection Policy and NiceAsicMiner Refund and Returns Policy for more details.
Only logged in customers who have purchased this product may leave a review.
We'll be by your side every step of the way to make sure your purchase is risk-free and hassle-free. We love cryptocurrency and our goal is to make you happy with our services. Find out how we stand out from the crowd and why you will benefit from working with us.
Purchase Contracts
Proforma invoice
Proforma invoice available for each individual order.
The invoice can be downloaded from the My Account page once payment has been made.
Formal sales contract
The formal purchase agreement is available for orders of US$50,000 (or more) or 50 units (or more).
In this case, please contact info@niceasicminer.com after payment made to get your contract.
Full Refundable
7-days no-questions-asked refund
7-days(from the time the delivery is signed for) no-questions-asked refund is available for every order.
The buyer must return the miner, with shipping costs paid by the buyer.
30-days full refundable
If there is a problem with the miner within 30 days of signing for delivery, the buyer can get a full refund.
The buyer must return the miner and the shipping costs will be covered by NiceAsicMiner.
Defective on arrival
If defective on arrival, the buyer will receive a full refund immediately and no return of the miner is required.
Learn more about the refund and return policy at: https://www.niceasicminer.com/refund_returns/
Secure Checkout
Our reliable payment systems give you the highest level of security at checkout.
We use cryptocurrency, which is reliable, and our shopping cart is powered by the HTTPS protocol, which uses 256-bit SSL certificates to encrypt your data and is Level 1 PCI compliant.
Test before shipping
Every miner from NiceAsicMiner comes with a test video before shipping so you can check out what it looks like when you receive it.
Smooth Setup
You don't need to be a technical expert or have any knowledge of cryptocurrencies or ASIC mining to set up your miner.
Setup is easy. If you want to make sure you're doing it right, we'll set it up for you for free.
Warranty
All miners are covered by a 180 day warranty (from the time the miner is signed for).
We've thoroughly tested all our miners to make sure there are no problems, but if there are, we'll fix them right away. Remember, we are always here to help you with any problems you may have.
You can get an extended 12-month warranty and free additional services when you purchase a Care Protection Plan.
Satisfying our customers is very important to us and we are sorry our product didn’t meet your expectations. Below are the details of our refund and return policy for your reference.
Overview
Three types of refund requests are supported:
- 7-days no-questions-asked refund
7-days no-questions-asked refund
7 days (from the time the delivery is signed for) no-questions-asked refund is available for every order.
The buyer must return the miner, with shipping costs paid by the buyer.
30-days full refundable
If there is a problem with the miner within 30 days of signing for delivery, the buyer can get a full refund.
The buyer must return the miner and the shipping costs will be covered by NiceAsicMiner.
Defective on arrival
If defective on arrival, the buyer will receive a full refund immediately and no return of the miner is required.
There are certain situations where only partial refunds will be given:
- Any item that is not in its original packaging.
- Any item returned more than 30 days after the date of delivery.
Other notes on the refund policy:
- To be eligible for a return, your item must be in its original packaging.
- To complete your return, we will need a receipt or proof of purchase.
- Please do not return your purchase to the manufacturer.
Learn more about our buyer protection and warranty policies at: https://www.niceasicminer.com/buyer-protection-policy/
Refunds
Once we have received and checked your return, we will send you an email to let you know that we have received your returned item. We will also notify you of the approval or rejection of your refund. In the case of "Defective on arrival", your refund will be approved automatically.
If approved, your refund will be processed within 7 days. You will be notified by email when your refund has been processed.
Our refunds support the following payment methods:
- USD (via Paypal)
- USDT (TRC20)
- Bitcoin (real-time exchange rate)
- Any other cryptocurrency you prefer (real-time exchange rate)
Late or missing refunds
If you haven't received your refund yet, please check your Paypal or cryptocurrency account first. It may take some time for your refund to be officially posted.
Next, contact your bank or wallet provider. There is often a processing time before a refund is posted.
If you've done all this and still haven't received your refund, please contact us.
Exchanges
We will only replace items if they are faulty or damaged. If you would like an exchange for the same item, please email us at info@niceasicminer.com
Gifts
If the item was marked as a gift when purchased and shipped directly to you, you'll receive a gift credit for the value of your return. A gift voucher will be sent to you once we have received the returned item.
If the item wasn't marked as a gift at the time of purchase, or if the gift giver had the order sent to themselves to give to you later, we will send a refund to the gift giver and notify them of your return.
By default, all miners will not be described as gifts in the waybill when shipped.
Shipping returns
To return your product, you should send it to our physical address.
Depending on where you live, the time it takes to receive your replacement product may vary.
If you are returning more expensive items, you may want to consider using a trackable delivery service or taking out a delivery insurance policy.
Need help?
Contact us at info@niceasicminer.com with any questions regarding refunds and returns.
city_dweller (verified owner) –
thanks!
mgmb (verified owner) –
Perfect! will buy again
iivan010170 (verified owner) –
A regular client of this seller. Excellent goods, packing as high as possible, the price is good. Recommend to cooperate
goga.pont (verified owner) –
very helpful, recommended seller.
marvinla88 (verified owner) –
Good product! I recommend this seller!.
yauhen (verified owner) –
Good quality! Shipment is fast!
rinatilkaev (verified owner) –
Great reseller. Thank you
bigunvitalik (verified owner) –
The seller\’s service attitude was very good. It was a pleasant shopping experience
wpgminer (verified owner) –
The machine works fine.
ftremblay (verified owner) –
Great reseller. recommended
ryan (verified owner) –
perfect! will order again
jean-denis.constantin (verified owner) –
Fast shipping 15 business days is OK. Housing very stable. Miner works very well.
mr.zahar888 (verified owner) –
It\’s coming, it\’s working.
eggsto (verified owner) –
best reseller
mike.fallen (verified owner) –
All excellent. will order again
levonmedia (verified owner) –
Great reseller.
ya.uraspb (verified owner) –
All excellent. thanks a lot
jastrebtseav (verified owner) –
fast and trusted! will order again
yartsev (verified owner) –
Great reseller. Recommend to all!
frode (verified owner) –
The product packaging is very good, it came as said. Thanks friends
d3miner (verified owner) –
good communication, Recommend
azusi1 (verified owner) –
Very good item! recommended reseller.
psvsp (verified owner) –
Perfect! Recommend!
marwan_farah (verified owner) –
Perfect, the Miner is in excellent condition. Thanks a lot.
kibaon (verified owner) –
Perfect! Strongly recommend!
artbox5000 (verified owner) –
shipping fast, recommended seller!
odi (verified owner) –
fast and trusted! will order again
s.shamaev (verified owner) –
Seller send me test video before shipping, it help me know more about what I am buying!
elovikovp (verified owner) –
The very attentive seller and the item corresponds to what is specified, when you order 1 unit it arrives very fast.
mikhailprovereno (verified owner) –
responsive reseller, recommended reseller.
miner.asik (verified owner) –
good communication, recommended seller.
avbasko (verified owner) –
packaging very very well done with reinforcement
fermamaxarchi (verified owner) –
delivery fast
rgodfredsen (verified owner) –
shipping fast
bilodeaum283 (verified owner) –
recomand , good quality
pissenlit15 (verified owner) –
Perfect communication, Recommend!
mike.fallen (verified owner) –
fast shipping and delivery, Strongly recommend!
7b79774760805 (verified owner) –
fast and trusted! Strongly recommend!
covisko (verified owner) –
looks great,good delivery time
capricornbit (verified owner) –
Fast Shipping, recommended reseller.
eeevvk (verified owner) –
Good reseller! will order again
animusorigin (verified owner) –
Perfect communication
1602867albertaltd (verified owner) –
good seller will order again
b79774760766 (verified owner) –
I love it,Great product and seller.
william.zaravellas (verified owner) –
shipping fast, Recommend to all!
riasatr (verified owner) –
Works great
antminer3d (verified owner) –
thanks a lot, very good quality 🙂
griha80 (verified owner) –
Perfect! Strongly recommend!
yoland.duval (verified owner) –
Perfect! Recommend!
oldroost (verified owner) –
love them very good quality!
renisans84 (verified owner) –
fast! Recommend to all!
gikon100 (verified owner) –
fast and trusted! recommended reseller!
xue.zhao (verified owner) –
All is well
ahhgiantpotato (verified owner) –
fast shipment
sergey.kotyrev (verified owner) –
This buyer its perfect. Fast shipping, 5 miner Buyed. All Good. 100% recomended.
molaei.farid (verified owner) –
good! will order again
dtaboh (verified owner) –
Great reseller. Recommend to all!
akvetkoff (verified owner) –
Excellent service! will order again
novec (verified owner) –
The machine is working very well, sellers are professional, I\’d buy more.
wpgminer (verified owner) –
good reseller will order again
torontobroker (verified owner) –
fast shipment, recommended seller!
ya.underwhat (verified owner) –
Fast Shipping! recommended reseller!
bylinkin-1993 (verified owner) –
Good
keysee87 (verified owner) –
Great reseller.