OneMiners★ Framhävd✓ Verifierad säljareFörlängd garantiBetala i delbetalningarI lager, snabb leveransAntminer T21 - 233 TH/sHosta hos dem från $0.0364/kWh, $118 i månadenSkickas från United States · kontrollerat för 24 h sedan
Kalkylatorn från vår gratis widget: varje återbetalningstid på sidan bygger på den.
Intäkt per dag
$8.52
El per dag
−$3.87
Hosting per dag
—
Vinst per dag
$4.65
Återbetald vid $996
—
Vinst och återbetalningstid är uppskattningar utifrån dagens myntpriser och nätverkets difficulty, före poolavgifter, hosting och skatt. De ändras varje dag. Inte finansiell rådgivning.
Rankningen använder algoritmens huvudmynt (BTC för SHA-256, LTC + DOGE för Scrypt): små sidokedjor kan betala mer per hash i dag men kan inte ta emot särskilt mycket hashrate.
Bitmain Antminer T21 (233Th) är en ASIC-miner från Bitmain för SHA-256-algoritmen med 233 TH/s vid 4,427 W. Den kom ut i februari 2024. Dess effektivitet på 19.0 J/TH ligger nära medianen av de SHA-256-miners vi följer (20.4 J/TH). Vid $0.036/kWh ligger den på plats 108 av 299 SHA-256-miners efter daglig vinst och tjänar runt $4.65 om dagen på BTC. Bästa priset på AsicProfit är $996. Med dagens siffror betalar den sig själv på ungefär 215 dagar. Med 75 dB hör den hemma i en mininganläggning eller ett hostingcenter.
Frågor och svar 6
Fråga om den här minern. Verifierade konton frågar och svarar, säljare svarar som sin butik och varje inlägg granskas innan det visas.
Yusuf D. · 26 okt. 2026 · om en annan 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 annan 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 annan 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 annan 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 annan 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 annan 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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