AvalonMiner 721 Bitcoin Miner Review

The AvalonMiner A721 is a bitcoin miner machine from the Canaan Yunzhi Information Technology Co, Ltd. It is a powerful bitcoin mining machine. This miner makes use of 6th generation A3212 chips. The computing power of this Bitcoin miner is 6 TH/S. The total power consumption is around 900 Watts.

 

In the older models, the A3218 chip is being used. The 16 nm process is used in the A3212 chip. It has helped to provide a great performance.

 

Now, we will evaluate the AvalonMiner 721 Bitcoin miner.

 

The AvalonMiner 721 Bitcoin miner comes with a 3-layer hard packing. A hard foam board is provided for the ground cover. You can find various export details in the packaging box.

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You will find three items inside this package. They are the bitcoin mining machine, data cable, and the AUC adapter. The length of the data cable is around 40 cm. Antistatic covers are used for the packaging of the adapter and the data cable.

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To provide sufficient insulation and protection from signal interference, the AUC adapter comes in an acrylic box. You will also find labels on the AUC adapter and the data cable. These labels will contain information related to the adapter and the cable.

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There will be five wires that need to be connected to the five-wire interface. You will find snapping at the position of the contacts. 

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You will be able to find labels containing different parameters on either side of this bitcoin mining machine.

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If you check the rear side of this bitcoin miner, you will be able to see a single cooling fan. The specification of the fan is 12 V, 2.75 A. It is a 4-pin 12 cm fan. The machine also comes with an air turbine outlet and a net for protection on the outside. This design will help to remove the excess heat from the miner machine.

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If you compare the front side of the AvalonMiner A721 Bitcoin miner, it is completely different from that of the previous miner generation. There are 4 computing power boards in this mining machine. Each of these computing power boards comes with a couple of PCI-E 6-pin power connectors. You will also find the data cable and the status indicators in it.

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Structure of the AvalonMiner 721 Bitcoin Miner

 

We will have a look at the physical structure of the AvalonMiner 721 Bitcoin miner machine,

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The AvalonMiner 721 Bitcoin Miner makes use of the honeycomb tuyere structure. The air enters the machine through this side. This design has become a part of the mining system of Avalon miners since the A4 model. Research has shown that the honeycomb tuyere structure helps to remove the physical noise of the machine. Thus, it helps to reduce the overall noise of the system. It makes the working environment more pleasant for the mining workers.

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In the old designs, there were 2 computing power boards. It has been changed to 4 computing power boards. This design helps to reduce the load on the power cable. It also helps to bring down the maintenance cost of the miner. Thus, the miner will be more stable.

 

You will find the physical parameters of the AvalonMiner 721 Bitcoin miner below.

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The AvalonMiner 721 Bitcoin miner makes use of the 1000-Watt Great Wall Dragon power supply for its power requirements.

 

The main controller of the AvalonMiner 721 Bitcoin miner is the Raspberry Pi. Officially, three types of Raspberry Pi modules are supported by this miner. It includes the Raspberry Pi 3, Raspberry Pi 2B, and Raspberry Pi B. You can connect the Raspberry Pi board through the AUC adapter. It is possible to connect 5 units with the help of the AUC adapter in a series fashion. It is, in turn, connected via the USB hub. It is possible to control up to 20 such miners through a single Raspberry Pi board. We will use the Type B Raspberry Pi module for evaluating the AvalonMiner 721 Bitcoin miner machine.

 

You can have a look at the below image to learn the technique of flashing the Raspberry PI firmware.

 

You can use a micro-USB cable to connect the Raspberry Pi as well as the AUC adapter. These are cables that are used as data cables for Android smartphones.

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The AUC adapter gets connected to the AvalonMiner 721 Bitcoin miner machine.

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You need to connect one of the USB ports of the Raspberry Pi. The Raspberry Pi board will come with a couple of USB ports. You can connect to any one of these ports. After that, you will have to connect the network wire to the Pi board. At last, you can connect the Raspberry board to the power supply.

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Now, you will have to connect the AvalonMiner 721 Bitcoin miner machine to the power supply. The AvalonMiner 721 Bitcoin miner machine comes with 4 computing power boards. Each of these boards will have a couple of PCI-E ports plugged in, or one of the ports will be connected. 

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You can see the actual wiring diagram of the AvalonMiner 721 Bitcoin mining system below.

 

Now comes the debugging part. 

 

Once you switch on the power to the miner, the IP address will be automatically assigned to the miner machine. You can find the new Ip address of the device through the software and enter the background details. You can see that the network segment of the AvalonMiner 721 Bitcoin miner machine is 192.168.0.*. You will have to do the necessary modification to make it into the same network. Only, then you can start the mining activities.

 

You will have to enter the IP address details of the miner first into the browser. Then, you need to go to the MM control interface page login of the AvalonMiner 721 Bitcoin miner. You will be able to see the logo of Avalon here. You will also see the password login box. You can go ahead with them without a password option.

 

There are only two steps required to set up the AvalonMiner A721 Bitcoin miner. The first thing to do is to set up the network.

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The next important thing to do is to configure the pool settings of the mining pool.

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You can go to the MM home page of the miner. You will be able to find the operating details of the AvalonMiner A721 Bitcoin miner here. You can view it on the home page.

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This interface is a traditional one. You can also see some advance settings on the inside.

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The noise in the indoor is around 39 dBa, and the room temperature is around 18 degrees Celsius.

 

You don’t have to set the frequency, fan, and voltage for the AvalonMiner A721 Bitcoin miner when it is in the running state. You only have to set the mining pool parameters and the network details in the appropriate place. The miner will run automatically according to these two settings and will make the necessary adjustments when needed. 

 

The observed computing power of this mining machine is around 6T just after starting the machine. The measured power is around 905 Watts.

 

There will be many automatic adjustments happening inside. It will take a few minutes. Once the miner becomes stable, you will see a fan speed around 2300 rpm. You can see the average computing power while doing a long-term run as 6.5 T. The minimum computing power is around 6.1 T. The maximum computing power is around 7.2 T. When you are running the miner for a long-term operation, there are no major fluctuations.

 

When the AvalonMiner A721 Bitcoin miner machine is running in the normal mode, the computing power of the machine is 6.52 T. The power measured during this time is around 1027 Watts.

 

Now, we will have a look at the noise produced by this miner machine. The measured noise is around 63.5 dBa. This noise is measured when the miner is running at a stable condition with a fan speed of 2300 rpm. The noise level is measured at 20 cm from the fan of the miner.

 

The noise level is also measured at night. The room temperature is very low during this time. The rotational speed of the fan is around 2000 rpm. The measured value is 53 dBa. It is also measured at a distance of 20 cm from the fan of the miner. 

 

There are various self-tests happening inside the miner machine when the machine is powered ON. During this initial phase, the fan in the miner will be running at full speed for around 2 seconds. Now, the noise level will be high, and the measured value is 74.5 dBa. Later, it will switch back to its normal speed. 

 

Now, we will have a look at the temperature values at different parts of the miner. The temperature on the chip is around 78 degrees Celsius. The temperature near the air inlet is 22 degrees Celsius. The background detection temperature is 28 degrees Celsius. The temperature at the air outlet is found to be 38 degrees Celsius.

 

Summary

 

Now, we will summarize the whole evaluation.

1.AvalonMiner A721 Bitcoin miner machine makes use of the A3212 chip. This chip uses the 16 nm process. The computing power is around 6.5 T, and the power consumed is 1027 Watts.

2. The operating system of the miner is fully automatic. It has happened since the Avalon 4. The system will adjust automatically to all the necessary settings while it is running. It makes this Bitcoin miner an easy-to-use miner.

3. The noise level of the AvalonMiner A721 Bitcoin miner machine is in the acceptable range. The speed of rotation of the fan gets adjusted automatically inside the miner. The noise level is around 53 to 64 dBa when the room temperature is around 20 degrees Celsius. When there is a reduction in the room temperature, the noise level also drops. It is due to the reduction in the fan speed.

4. An AUC adapter is used to connect the miner to the Raspberry Pi. The fact that this miner system is compatible with all the Raspberry Pi models makes things easy for the user. It helps to save the cost as well as reduce the maintenance if you consider the case of a mining farm that uses 1200 miner machines. If the cost of each controller is around 100. It will help you save thousands of capital costs.

5. There is an upgrade in the number of computing boards in the miner. In three previous generations, there were two computing power boards. In this model, you can see 4 computing power boards. It helps to reduce the cost of maintenance. It also helps to reduce the load on power supply cables. Thus, the mining setup will be more stable.

6. We strongly recommend using a high-quality power supply unit with this miner. It will help to improve your machine’s performance.

7. Now, when you consider the heating factor, the temperature difference between the front side and the back side of the mining machine is quite high.

8. The packing of the machine has also improved drastically. There is also support for the cluster management program of the mining machines. The performance of the AvalonMiner A721 Bitcoin miner machine is really impressive.

 

Raspberry Pi Firmware Flashing Tutorial

 

You need to go to the official website first and download the necessary firmware. Make sure that the firmware version matches the Raspberry Pi board that you are using.

https://canaan.io/downloads/software/avalon7/openwrt/20161121/

Now, you will have to download the software for the firmware, which is the Win32 Disk Imager.

 

http://www.onlinedown.net/soft/110173.htm

 

Now, connect the SD card with the help of a card reader.

 

Click and open the Win32 Disk Imager software. Select the appropriate firmware to start the process.

 

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