Bitmain has recently unveiled its newest state-of-the-art Antminer, the S21 Hydro, representing the next generation of mining machines. Engineered for mining the SHA-256 algorithm, this device boasts an impressive maximum hashrate of 335TH/s, all while operating on a power consumption of 5445W.
Specifications
| Brand |
Antminer S21 Hyd. |
| Model |
S21 Hyd. |
| Algorithm | Cryptocurrency |
SHA256 | BTC/BCH/BSV |
| Hash Rate |
335TH/s ± 3% |
| Power on wall @25°C, Watt |
5445w ± 5% |
| Power efficiency on wall @25°C, J/TH |
16 ± 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, with package),mm |
570*316*430 |
| Net weight, kg(2-2) |
13.1 |
| Gross weight, kg |
15.4 |
| 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.
The delivery was quick, and the product performed exactly as described. I’m very happy with my experience and will buy from them again.
Hessa Al-Otaibi
3 weeks ago
First time mining Bitcoin, so I went for the Antminer S17 Pro. The team at NiceASICMiner provided guidance on setup, which was super helpful. The machine works perfectly, and the efficiency is as advertised.
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
4 weeks 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.
Rūta Petrėnas
4 weeks ago
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.
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.
inzimno1 (verified owner) –
The product is very good and runs smoothly
acfinancial (verified owner) –
Perfect! recommended reseller!
mikecrane1978 (verified owner) –
Perfect! recommended seller.
tisnoslo (verified owner) –
good seller! thanks!
albertaholdingsgroup (verified owner) –
excellent supplier
fviapiano (verified owner) –
the block is excellent; started in work
mobdan (verified owner) –
best reseller. will buy again
NiceAsicMiner (verified owner) –
fast! will order again
vorontsov.y (verified owner) –
fast! Recommend to all!
vlad.aries27 (verified owner) –
Very Nice!
kalinin2483 (verified owner) –
good! thanks!
luc.talbot (verified owner) –
Perfect communication! will buy again
pm1661 (verified owner) –
responsive seller
adam.nickies08 (verified owner) –
fast shipment, Recommend!
cman9933 (verified owner) –
Good. I\’ll buy it again next time
gradiator1988 (verified owner) –
fast! recommended reseller!
coryco_ca (verified owner) –
good miner, will buy again
antminer.d3 (verified owner) –
Quick delivery, recommended seller!
2b79774760765 (verified owner) –
Good purchase fast shipping i will reorder more
kliverac (verified owner) –
fast delivery thanks
laurenvancer (verified owner) –
Recommend to all!
arivour (verified owner) –
recommendet this seller. All good.
flamer962 (verified owner) –
Very good item, recommended
leusgs (verified owner) –
fast, recommended
NiceAsicMiner.asic.1 (verified owner) –
fast! Recommend!
donald151 (verified owner) –
Recommend
themafia.69 (verified owner) –
Would highly recommend using this company for purchasing Bitcoin mining equipment, very helpful.
rabushko82 (verified owner) –
good! recommended seller.
sam_4110 (verified owner) –
fast, will do business again.
dobrinevski (verified owner) –
good reseller will buy again
violet_koh (verified owner) –
6 days shipping to Germany. Sellers very friendly. I can recommend! Thank you
11kristony (verified owner) –
good communication, recommended seller!
danmac1 (verified owner) –
very helpful, recommended reseller!
patriceliautaud (verified owner) –
very helpful, Recommend!
diabloking78 (verified owner) –
Good packaging, recommended reseller.
afrog2 (verified owner) –
good communication, Recommend
dtaboh (verified owner) –
professional, will buy again
gigaden (verified owner) –
fast shipment, recommended seller.
richard.hein (verified owner) –
professional, will order again
gikon100 (verified owner) –
shipping fast, Recommend to all!
spapizh (verified owner) –
delivery fast, recommended seller.
hanic1031 (verified owner) –
very helpful, recommended
pkhenderson81 (verified owner) –
best reseller. Recommend!
shura (verified owner) –
Quick delivery, recommended
pierre_lefeuvre (verified owner) –
professional, will buy again
gipnoshmel (verified owner) –
Perfect! Strongly recommend!
cooxpedia (verified owner) –
Good reseller! thanks!
abg (verified owner) –
all in order
skyhawk777 (verified owner) –
good seller! thanks a lot
optiform (verified owner) –
Good purchase fast shipping i will reorder more
evbudyto (verified owner) –
fast shipping and delivery, recommended seller!
mikedennison (verified owner) –
fast delivery , the goods conform to the description
vanja-ladugin (verified owner) –
Quick delivery, Recommend
dnymscmine (verified owner) –
Good packaging, recommended seller!
kuznecovdv2000 (verified owner) –
Very good item! Recommend!
lyulko88 (verified owner) –
Fast Shipping! Recommend to all!
vorontsov.y (verified owner) –
shipping fast
hyip.invest853 (verified owner) –
Great seller. The goods were bought bu. I\’m happy with the purchase, I will buy more.
formining001 (verified owner) –
very helpful, recommended seller.
giljack (verified owner) –
Excellent service! will buy again
oleg_desna (verified owner) –
fast and trusted!
jows.hwang (verified owner) –
best seller. Recommend!
viper_9000 (verified owner) –
Good seller! Recommend!
andrew (verified owner) –
It\’s coming, it\’s working.
dsdds (verified owner) –
Fast shipping thanks.
novec (verified owner) –
acceptable
danilov (verified owner) –
Very good seller. I even sent a video of how the miner works before sending. Recommend
artyom.bulanov (verified owner) –
best seller. Recommend!
2mpz (verified owner) –
good reseller will buy again
ourbitcoinminingpool (verified owner) –
Easy to set up. And very nice after service from seller, helps a lot.
ed (verified owner) –
Perfect communication, recommended reseller!