Antminer S21 Pro+ 234T mining hardware

SHA256 ASIC Miner for Bitcoin

The Antminer S21 Pro+ 234T is an air-cooled ASIC mining machine built for the SHA256 algorithm. It delivers a hashrate of 234 Th/s while drawing 3510 W at the wall, yielding a power efficiency of 15 J/TH. The unit operates on 220–277 V AC input at 50–60 Hz with a maximum current draw of 20 A and requires a 4000 W power supply. It connects to the network via RJ45 Ethernet 10/100M.

Build Integration and Requirements

The miner measures 450×219×293 mm and weighs 18.5 kg, fitting standard rack or shelf deployments. It produces 76 dBA at 30 °C, so acoustic planning is necessary for indoor sites. Operating temperatures range from –20 °C to 45 °C with 10–90 % relative humidity, and it is rated for altitudes up to 2000 m. A 4000 W PSU and a 220–277 V circuit capable of 20 A must be provisioned before installation.

Upgrade Context and Value

Replacing older SHA256 ASICs that run above 30 J/TH cuts electricity cost per terahash by roughly half at current rates. The efficiency gain pays back the hardware investment faster when power prices exceed typical industrial tariffs. If your existing fleet operates near 45 J/TH or higher, the jump to 15 J/TH delivers a clear margin improvement within a single difficulty epoch.