In our Antminer S21 assessment, we examined the hashrate and effectivity of the S21 in quite a lot of totally different temperatures and when it was transformed to grease cooling to check its true efficiency.
S21 is the most recent technology ASIC miner launched by Bitmain in 2023 with SHA256 algorithm. Can at present mine BTC/BCH/BSV. The S21 specification is printed by a Bitmain official with a hashrate of 200T and an vitality effectivity of 17.5 J/T. Bitmain additionally reveals the impact of temperature on the hash fee and energy consumption ratio of the positioning. The S21 appears to be essentially the most environment friendly Asic miner but, so we ran two samples to check the precise efficiency.
About S21 check information
- At ambient temperature
2. At warmth tolerance temperature
The tolerance temperature of S21 is 48℃. When the ambient temperature exceeds 40℃, the hash board prompts the overheat safety, which ends up in underclocking the chip. The frequency shall be lowered from 490M to 440M. If the temperature exceeds 47℃, the S21 miner will mechanically shut down as a security precaution.
3. Beginning at low temperature
S21 can begin and work successfully at -10℃. Whereas it usually begins at -20°C and -15°C, the system prompts low temperature safety and shuts down the miner. Subsequently, the S21 requires a better preliminary temperature in comparison with the S19XP.
4. When changing air-cooled to oil-cooled
The oil-cooled model has improved the ability density of the unit in comparison with the air-cooled, however when the air-cooled model is oil-cooled, it additionally faces guarantee points and has fewer benefits than the precise immersion-cooled miners. When S21 converts from air-cooled to oil-cooled, the ability consumption ratio is larger than 18.5W/T at 50℃, it begins underclocking at 55℃ and is in excessive temperature safety at 60℃.
5. Begin at every temperature level
The facility consumption ratio will see an approximate improve of 1.74 W/T when the hashrate reaches 200 T within the temperature vary of 20℃ to 35℃. At 40℃, the frequency of S21 decreases, leading to an working frequency beneath 440M and a hash fee of 180T. Furthermore, at 45 °C, the ability consumption ratio will increase by about 2.4 W/T. As quickly because the temperature exceeds 45 °C, the safety mode is triggered, which ends up in a fast improve within the energy consumption ratio.
We discovered that when two air-cooled S21 miners function at temperatures of 25℃ and above, their energy consumption ratio considerably exceeds the official specs supplied by the producer. As well as, the hash fee reveals important fluctuations beneath excessive temperature circumstances. Beneath some excessive temperatures or harsh environmental circumstances, the S21 is not going to obtain the required energy consumption ratio and lose its aggressive benefit available in the market.
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