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Top 9 Best ASIC Miners 2021; Which is the Most Profitable?

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There are two ways of adding bitcoin to your portfolio – you can buy bitcoins from an exchange or mine bitcoin using the best ASIC miners. While buying bitcoin can be super easy, mining it can be profitable in the long run depending on the price action. But setting up the mining rig, checking for other factors like electricity cost, maintenance, etc., is challenging. This is why cloud mining platforms are growing in popularity.

If you have decided to spare some time and give ASIC mining a shot, this article will help you pick the best bitcoin mining hardware. Choosing an inefficient ASIC miner can be devasting and you might end up with zero profits.

In this piece, we review some of the fastest and most efficient bitcoin miners for 2021. We have also covered some important factors you’d need to look for while choosing a bitcoin miner.


Top 9 Best ASIC Miners 2021


1. Bitmain Antminer S17 Pro

Launched in 2019, Bitmain’s Antminer S17 has a hash rate of 56 TH/s. This translates to around 0.0004 BTC mined per day. 

The S17 Pro consumes around 2094 – 2568 watts per hour of regular operation. Assuming that the electricity cost is $0.12 KW/h, Bitmain Antminer S17 will give you approximately $13 (at 2500 watts) in daily profits, which calculates to more than $4,500 in yearly returns at the current BTC price. Honestly, these are good numbers; S17 Pro yields positive ROI. 

Antimer S17 Pro runs on a second-generation 7 nanometer chip – BM1397, allowing S17 to achieve 56 TH/s. This is a massive increase from S15’s 18-28 TH/s. 

As for power consumption, the S17 Pro needs a significant amount of power to cool the device. Nonetheless, it has three operation modes – Low Power, Normal, and Turbo. Furthermore, using S17 Pro’s mode-switching functionality, you can dynamically manage your mining operations. Also, if you keep your mining rig in the coolest possible conditions with proper ventilation, your mining operations will be more efficient. 

Setting up the S17 Pro is a simple process. Moreover, it comes with a power supply unit (PSU) attached to its chassis, so you don’t need to buy PSUs separately. 

If you purchase a quality used unit of S17 Pro, it will cost you around under $7,000 (at the time of writing this). Considering that S17 Pro yields over $4,500 in profits each year, you will cover your initial investment in about 1.5 years. Yes, in less than 1.5 years, you will start getting more than $4500 in profits each year on your mining device (considering current return rates). 




2. Bitmain Antminer S19

The S19 Antminer boasts a hash rate of 95 TH/s; therefore, it can mine around 0.0007 BTC per day. 

Say electricity costs $0.12 per KW/h. With 3250W of power requirement, S19 will give you over $25 in profit per the current BTC price. If you do the math, yearly profits go as high as $9000. 

There is no denying that Bitmain Antminer S19 has a very high power consumption. It requires 3250W of power at a room temperature of 25^C. And as you know, the hotter the surrounding environment, the more energy the cooling unit will consume. Typically, the S19 miner gives its best performance when kept within 5-40 degrees Celsius. To extend the life of this mining unit, it is recommended to keep it in a cool and dry place, ideally in the basement. 

The best part is that setting up the S19 miner via the Minerlink GUI is an easy process. Also, S19 supports Ethernet only. 

As for power supply, no need to worry about power supply units (PSUs). All PSUs are included with the miner; you don’t need to purchase separate hardware for the power supply.

Once you set up the mining unit, it will automatically begin hashing upon powering up. This feature will help you in case of power failure. 

Regarding pricing, you can get a new S19 unit for around $12,000(at the time of writing this), whereas used ones will cost you between $6000-$8500. 

As mentioned, S19 generates a yearly of over $9000. Considering this, if you buy a brand new S19 unit, you will recoup your entire initial cost in almost 1.5 years. On the other hand, if you purchased a used unit, it will take you less than a year to cover your initial investment, and you will start receiving generous returns. Keeping all this in mind, S19 is an excellent investment.



3. Bitmain Antminer S5

The Antminer S5 may not be the latest Bitcoin mining hardware (other models like the S7 and S9, have come after it), but it is still in use, and its efficiency and function is exemplary.

The Bitmain Antminer S5 features a power supply labeled 115 Volts, and that draws about 560 Watts. With the low power needs and consumption, small power supply, similar to those running desktop computers can accommodate the Antminer S5.

With regards to efficiency, the unit produces about 1 GH/s for every 0.51 watts consumed. Which translates to 0.51 J/GH. Compared to its predecessor, the S3, the S5’s efficiency has improved. All these integrated features makes it the most powerful bitcoin miner in the current market.

As for the weight, the S5 weighs 2.5kgs. Its reduced weight is courtesy of its lightweight material and the fact that it is open from top to bottom. The setup is not rocket science and requires no prior tech experience. All these features make it the best antminer in the current market.



4. Bitmain Antminer S7

The Bitmain Antminer S7 was introduced to the market in 2015. It has since become one of the most popular Bitcoin hardware miners and dominates the market courtesy of its low power consumption compared to the S5.

The power supply unit recommended for use the S7 is the 1600 watt APW3.

The miner can run even the most potent mining hardware – the Antminer S9. It, however, requires a minimum of 205 Volts to operate. The optimal power consumption makes it the most efficient bitcoin miner.

The efficiency of the S7 depends on the effectiveness of the power supply used and the ambient temperature. But, at room temperature of about 25 degrees Celsius, the S7 produces about 1300 watts. At this point, you should note that every generation of the Antminer is near twice as efficient when compared to its predecessor.

It weighs 7.5 pounds and features a durable metal casing with a groove and tongue system incorporated into it. Since the unit is noisy, it is not ideal to have it inside a home. Additionally, it is imperative to ensure you put it in a cool environment to ensure that you spend less energy trying to cool it as it mines.



5. Bitmain Antminer S9

Bitmain Antminer S9 features the highest hash rate of about 14 TH/sec and is by far the most efficient mining hardware available.

This high hash rate has been made possible courtesy of 3 circuit boards featuring a total of 189 chips. For all that the S9 has to offer, you should expect to pay a pretty penny for it.

The Antminer S9 can be used with the Antminer 1600 Watt power supply efficiently. Speaking of efficiency, the S9 is notably the most efficient mining hardware available. And while it consumes 300 watts more compared to the S7, it is twice as efficient with about 0.1 Joules per Gigahash.

The unit has a sturdy design and weighs 10.4 pounds. The sturdy design comes in handy when a miner needs to arrange the multiple miners on one shelf. Using the S9, you best have it in a garage or a warehouse. The noise produced is unbearable for a home.



6. Antminer T9

T9 is yet another excellent best bitcoin miner 2021 on the list. It should, however, be pointed out that it is slightly on the higher price range. With regards to comparing the T9 to the S9, miners are split on which is better. Below is a brief review of the T9 that will allow choosing between the two an easy process.

The T9 consumes about 1450 watts for approximately 11.5 TH/s for Batch 23. It has an efficiency of 0.126 J/GH. Going with these numbers, the S9 is better than the T9. But before you make the decision, note that the quality chips in the S9 were of a slightly lower quality which leads to their reduced stability. The T9 Miner has this problem fixed.

The T9 also attended to the pre-auto-freq issue prevalent with the S9 miner.



7. AvalonMiner 741

If you are looking for an excellent bitcoin miner at an affordable price, this is the one for you. This product is the latest addition to the industry by the company Canaan. It provides a good hash rate about 7.3 TH/s and features an air forming cooling system that enables 88 chips to function great as a single unit. Also, it helps to keep the miner running at all times.

The unit features an efficiency of 0.16 J/GH. This efficiency rating is way better compared to all other products in its price range.



8. Antminer L3

The L3 sports four boards containing 288 chips. The number of chips is double that of its predecessor the L3 miner. The overall design allows for the unit to be arranged with ease when multiple miners are in use simultaneously.

While the L3 is a easy mining hardware to use, it comes packing in power just like most of the mining hardware listed in this review. It has a hash rate of about 504 MH/s and uses up approximately 800 watts and sports an efficiency of 1.6 J/MH.

The power supply recommended to be used with this miner is the Antminer L3 Power supply. This power supply unit can also be used with the S9.



9. Bitmain Antminer D3

This mining hardware was introduced into the market in 2018 and has been among the most poular Dash ASIC miners.

Most miners are using this hardware to first mine dash coins which they later convert into Bitcoins and make huge profits in the process. The Antminer D3 provides a hash rate of 15 GH/s and uses up to about 1200 Watts.

Overall, it measures 320x130x190mm which makes it possible to have a neat arrangement when running multiple miners simultaneously.


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