Bitmain Antminer T21 (233Th)은(는) Bitmain의 SHA-256 알고리즘용 ASIC 채굴기로, 4,427 W에서 233 TH/s의 성능을 냅니다. 2024년 2월에 출시되었습니다. 효율 19.0 J/TH는 저희가 추적하는 SHA-256 채굴기 중앙값(20.4 J/TH)과 비슷합니다. $0.036/kWh 기준 일일 수익으로 299대의 SHA-256 채굴기 중 108위이며, BTC 채굴로 하루 약 $4.65를 법니다. AsicProfit 최저가는 $996입니다. 현재 수치로는 약 215일 만에 본전을 찾습니다. 75 dB로 전용 채굴장이나 호스팅 시설에 두어야 합니다.
질문과 답변 6
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Yusuf D. · 2026년 10월 26일 · 다른 버전에 대해
T21 shows warning J1:2 and power voltage read failed. What does it mean?
AsicProfit SupportAsicProfit · 2026년 10월 27일
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. · 2026년 10월 22일 · 다른 버전에 대해
Is the T21 three-phase? I only have single-phase 240V at home.
AsicProfit SupportAsicProfit · 2026년 10월 24일
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. · 2026년 10월 17일 · 다른 버전에 대해
can i just pull the plug on a T21 to switch it off
AsicProfit SupportAsicProfit · 2026년 10월 18일
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. · 2026년 10월 15일 · 다른 버전에 대해
Why is the T21 cheaper than the S21, and is it the better buy?
AsicProfit SupportAsicProfit · 2026년 10월 15일
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. · 2026년 9월 29일 · 다른 버전에 대해
My T21 keeps overheating in summer and some boards now show 0 of 108 chips. Hardware or cooling?
AsicProfit SupportAsicProfit · 2026년 10월 1일
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. · 2026년 9월 28일 · 다른 버전에 대해
How loud is the T21 and how much heat does it put out?
AsicProfit SupportAsicProfit · 2026년 9월 28일
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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