OneMiners★ Fremhævet✓ Verificeret forhandlerUdvidet garantiAfdragsbetalingPå lager, hurtig leveringAntminer T21 - 233 TH/sHost hos dem fra $0.0364/kWh, $118 om månedenSendes fra United States · tjekket for 24 t siden
✓ På lager
Bedste pris$996215 dage tilbagebetaling · $4.27/TH
Beregneren fra vores gratis widget: hver tilbagebetalingstid på siden bygger på den.
Indtægt pr. dag
$8.52
Strøm pr. dag
−$3.87
Hosting pr. dag
—
Overskud pr. dag
$4.65
Tilbagebetalt ved $996
—
Fortjeneste og tilbagebetaling er estimater ud fra dagens møntkurser og netværkets difficulty, før poolgebyrer, hosting og skat. De ændrer sig hver dag. Ikke finansiel rådgivning.
Ranglisterne bruger algoritmens hovedmønt (BTC for SHA-256, LTC + DOGE for Scrypt): små sidekæder kan betale mere pr. hash i dag, men kan ikke optage ret meget hashrate.
Bitmain Antminer T21 (233Th) er en ASIC-miner fra Bitmain til SHA-256-algoritmen med 233 TH/s ved 4,427 W. Den kom på markedet i februar 2024. Dens effektivitet på 19.0 J/TH ligger tæt på medianen af de SHA-256-minere, vi følger (20.4 J/TH). Ved $0.036/kWh er den nr. 108 af 299 SHA-256-minere målt på daglig profit og tjener omkring $4.65 om dagen på BTC. Den bedste pris på AsicProfit er $996. Med dagens tal tjener den sig selv hjem på omkring 215 dage. Med 75 dB hører den til i et dedikeret mining-anlæg eller hosting.
Spørgsmål og svar 6
Spørg om denne miner. Verificerede konti spørger og svarer, forhandlere svarer som deres butik, og hvert indlæg tjekkes, før det vises.
Yusuf D. · 26. okt. 2026 · om en anden version
T21 shows warning J1:2 and power voltage read failed. What does it mean?
AsicProfit SupportAsicProfit · 27. okt. 2026
It points to the power side: the control board could not read the supply voltage, and the miner restarts. Measure each phase under load, not just at idle, and check the PDU sockets and cable terminations, since loose pins at the back of the socket are a known cause. If all three phases are healthy, the power supply is the next suspect. A unit under warranty should go back to Bitmain or an authorised repair centre.
Felix W. · 22. okt. 2026 · om en anden version
Is the T21 three-phase? I only have single-phase 240V at home.
AsicProfit SupportAsicProfit · 24. okt. 2026
Yes, the standard T21 ships for 380-415V three-phase input, which surprises many buyers because most Antminers in this class are single-phase. Owners confirm it needed electrical upgrades and three-phase PDUs. A few hobbyists run modified T21s on single-phase power supplies at reduced wattage, but that is a do-it-yourself conversion outside the warranty. Check your supply before you order.
Lucas O. · 17. okt. 2026 · om en anden version
can i just pull the plug on a T21 to switch it off
AsicProfit SupportAsicProfit · 18. okt. 2026
Not on the T21. An owner reported that its three-phase connector is not designed to be pulled under load, and if neutral breaks before the live pins it can damage the cable and power supply. Switch it off at the breaker first, then unplug. Frequent hard power cycling is also hard on solder joints, so fix the cause of any overheating rather than repeatedly cutting power.
Mark J. · 15. okt. 2026 · om en anden version
Why is the T21 cheaper than the S21, and is it the better buy?
AsicProfit SupportAsicProfit · 15. okt. 2026
The T21 does 190 TH/s at 19 J/TH, while the air-cooled S21 does 200 TH/s at 17.5 J/TH. You pay less up front but more electricity per terahash, so the T21's margin shrinks faster when difficulty rises or the Bitcoin price falls. It also needs three-phase power. With cheap three-phase electricity it can make sense; otherwise compare both in the calculator on this page at your power price.
Dmitri V. · 29. sep. 2026 · om en anden version
My T21 keeps overheating in summer and some boards now show 0 of 108 chips. Hardware or cooling?
AsicProfit SupportAsicProfit · 1. okt. 2026
It can be both. Owners report T21s struggling in hot containers, with corner chips running much hotter than the rest, and boards that lose chips after a restart. Check fans and intake temperature, reseat the hashboard and control board cables, and test boards one at a time. Repasting the heatsinks has helped several owners. Faulty PDU socket pins that drop a phase can also cause odd chip errors. Underclocking through the hottest months is a common workaround.
David C. · 28. sep. 2026 · om en anden version
How loud is the T21 and how much heat does it put out?
AsicProfit SupportAsicProfit · 28. sep. 2026
It is listed at about 75 dB, which is not suitable for a living space. Nearly all of its roughly 3,610 W becomes heat, about 12,300 BTU per hour, so the room needs strong ventilation or ducting for the exhaust. The listed operating range is 5 to 45°C, but owners advise keeping intake air well below the top of that range for long life.
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