Avalon this name I believe we are all familiar with, Avalon series mining machine by Jia Nan Yun Zhi company production and development, the company since 2013 began to release mining machine, can be said to be the originof the global mining machine industry. In September this year, avalon's latest A9 series officially put on sale, the first A921 with a 7nm ASIC chip and close to the people's price (5400 yuan) naturally attracted a lot of attention.

First look at the screenshot of the parameters on the official website:

As usual, we first compare with the official parameters of mainstream mining machines in the market:

From the comparison of official parameters, avalon 921 has a certain advantage in power consumption ratio, which I believe also makes everyone look forward to the evaluation results.

The disassembly and evaluation results are as follows:

Let's first look at the internal structure of the mining machine.

Remove the shell of the mining machine, we observe from the air outlet, we can see that the layout of the internal radiator is very close.

Observing from one side of the air inlet, it can be seen that the interior of the mining machine is splice together by two symmetrical units along the longitudinal central axis.

For further disassembly of the above units, we took out a single heat sink and a force plate, as shown in the figure below:

We can see that the chips are evenly distributed on two parallel metal plates in a single calculation plate, and 26 chips are designed on a single metal plate, so the number of chips in a single calculation plate is 26*2=52. Based on the symmetry of the units at both ends of the inner axis of the mining machine, we can know that the total number of chips in the mining machine is 104. The spacing of the chips is sparse from the air inlet to the air outlet, and the surface of each chip is coated with thermal silicon grease to improve heat dissipation efficiency.

Removing the thermal grease on the surface of the chip exposes the chip model A3206.

From the mining machine disassembly situation, avalon A921 in the mining machine design, will focus on the heat dissipation and ventilation convenience, the layout of the calculation plate and the number of chips are therefore more or less limited.

Does this design lead to more stable and efficient mining performance? Let's take a look at how the measured data compare with the official parameters:

The above data are the average value of calculation force, power and power consumption per T obtained after the mining machine runs for 24 hours. The temperature of the test room is about 30~33 degrees, and the power supply and network are stable, but the interference of other uncontrollable variables to the test cannot be ruled out.

By analyzing the table data, the actual performance of avalon A921 in this test is as follows: calculation power is lower than the rated level by 2.8% (within the official error range), power is higher than the rated level by 14.3% (within the official error range), and energy consumption ratio is higher than the official data by 17.6%.

From the single error point of view, when the actual measured force is lower than the rated value, the measured power is higher than the rated value. Although there may be force majeure in the measured environment to interfere with the test results (the laboratory has made artificial control of the environment and conditions of this test as much as possible), judging from the current test results, The Performance of the Avalon A921 can only be said to be in line with the official rating parameters.

Disassembly and measurement summary of Avalon A921

1. Avalon A921 mining machine adopts a sparse internal structure and layout to obtain better ventilation and heat dissipation effect and ensure the stability of equipment operation.

2. The actual test data are within the fluctuation range of the official parameters, but the measured power consumption per T is 17.6% higher than the official parameters.

In order to eliminate the interference of uncontrollable factors and the possible impact of this evaluation on Avalon mining machine manufacturers, Rawpool Lab welcomes other partners/organizations who are passionate about mining machine research to join the testing team of Avalon A921 and share more test results of this model with the community.

Detailed parameters:

Basic parameters:

Type of mining machine :ASIC mining machine (professional mining machine)

Currency of production: Bitcoin (BTC)

Rated power :20TH/s, -5%-10%

Rated power consumption :1700W, 0%-20%

Power consumption ratio :85 W/T

Rated voltage :11.6-13V

Chip parameters:

Chip :A3206, ASIC

Number of chips :104

Chip process :7nm

Other parameters:

Product size :378×170×155mm

Product weight :5.9kg

Power interface :10 x 6PIN interface

Network connection: Ethernet

Heat: 14038 fan, 6000 RPM

Noise :70dB (typical value)

Operating environment: -5℃ -30 ℃