Bitmain Antminer S21 XP 270T

Bitmain Antminer S21 XP The Bitmain Antminer S21 XP 270T is the newest generation of ASIC miners from Bitmain, released back in June 2024. With a hashrate of 270 TH/s and an energy efficiency of 13.5 J/T, the S21 XP delivers a 12% improvement in efficiency compared to the S21 Pro, making it one of the most powerful and efficient Bitcoin miners still available in 2026.View our full teardown and review of the Antminer S21XPKey FeaturesHashrate: 270 TH/sPower Consumption: 3684 WEfficiency: 13.5 J/T (real-world tested)Cooling: Four 140 mm fans Power Supply: PSU includedControl Board: Amlogic A113D with 0.91″ OLED displayWarranty: 1-year manufacturer warrantyDesign & BuildThe S21 XP keeps the wide-body design of the S21 Pro, with identical dimensions and a gross weight of 47 lbs. It includes a C20-P13 power cable and features robust aluminum-backed hashboards with bolt-on heatsinks for reliable cooling.One new addition is the detachable OLED display on the control board panel, giving operators quick access to miner status without logging into the dashboard.Chip & Hashboard ImprovementsThe S21 XP hashboards carry 91 chips per board, compared to 65 chips on the S21 Pro. Each chip hashes at ~1 TH/s, running at lower frequencies for better efficiency. Power delivery has also been upgraded, with tinned copper bus bars replacing traditional PCB traces for more stable performance.Why Choose the S21 XP?✅ 12% more efficient than the S21 Pro✅ Advanced cooling and power design✅ Real-world tested efficiency of 13.5 J/T✅ Optional Vnish aftermarket firmware for additional optimization✅ Backed by Altair Technology’s fast U.S. shipping & supportIn SummaryThe Antminer S21 XP 270T combines raw power, advanced efficiency, and next-gen design improvements, making it the go-to choice for Bitcoin miners looking to scale their operations in 2026. With competitive pricing, U.S.-based shipping, and warranty-backed support, Altair Technology is your trusted source for the latest in mining hardware. Bitmain does offer a manufactures warranty on their antminers. Here is a warranty guide to walk you through that process. SpecificationsProduct Glance ModelS21 XPAlgorithm | CryptocurrencySHA256 | BTC/BCHHashrate, TH/s270Power on wall @25°C, Watt3645Power efficiency on wall @25°C, J/TH13.5Detailed Characteristics Power supply Power supply AC input voltage, Volt(1-1)220~277Power supply AC input frequency range, Hz50~60Power supply AC input current, Amp20Adapted AC output power requirement, W4000Hardware Configuration Network connection modeRJ45 Ethernet 10/100MMiner size (length*width*height, w/o package),mm(2-1)450*219*293Miner size (length*width*height, with package),mm680*390*450Net weight, kg20Gross weight, kg22Noise@25℃，dBA76Environment requirements Operation temperature,°C-20~45Storage temperature,°C-20~70Operation humidity(non-condensing) , RH10%~90%Operation altitude, m≤2000 S21 XP Mining Profitability Calculator S21 XP Initial Review & Performance Benchmarking Antminer S21 XP 270T - First ImpressionsAnnounced in June 2024, first batch of Antminer S21 XP 270T was released last week. We just got our first units, so lets take a closer look at the device ���� pic.twitter.com/c336saLafK— Altair Technology® ⛏️ (@altair_tech) September 17, 2024 ⚡Antminer S21 XP 270T performance benchmarking with VNISH firmware⚡️��#WeMineBitcoin pic.twitter.com/kSQxasD8gl— Altair Technology® ⛏️ (@altair_tech) October 23, 2024 Frequently Asked Questions Is a power cord included with the miner Yes, a C20-P13 power cord is included in the box for the units we’ve tested.  How much overclocking is possible with Antminer S21 XP? We were able to achieve about 316T on aircooled overclocking I'm not getting the advertised efficiency on stock settings. Is there something wrong with my miner? Mining efficiency is highly dependent on ambient air temperature. If your miner is pulling more power than expected, in most cases it is due to a higher ambient temperature. You can improve mining efficiency by preventing mixing of hot exhaust air with intake air.  Which control board does this miner come with? We’ve seen AMLOGIC A113D control boards on our test units.  Does the fans on this miner have rectangular or square connectors? All 4 fans on Antminer S21 XP have 4-pin square fan connectors. The fans are 140mm wide and much larger than those on previous antminers.  How can I make this quiet for home use? Stock fans on Antminers can be very loud (~75 dB) at full speed. There are however multiple ways to make them quieter. First way to make them quieter is to run them at substantial underclocking. This will significantly reduce the hashrate, but will also reduce fan noise, since the fans don’t have to run at full speed when underclocked. Another way to reduce noise is by replacing stock fans with an inline AC infinity fan. You can learn more about this here. This method allows running the miners on stock hashrates and may even allow some overclocking in many cases. Third way to reduce fan noise is by running the miners in immersion mode. In this method the miners are immersed in vats of mineral oil or dielectric fluid. This significantly improves heat transfer and enables substantial overclocking. Immersion mining however voids all warranty, is more complex to setup and immersion fluid can act as a solvent and damage some mining gear. We believe that this is still an experimental technology reserved for the most technically inclined. We do not recommend immersing Antminers to most customers for this reason. Stock Antminer firmware does not allow much flexibility in terms of overclocking/underclocking , fan control, automated temperature control etc. In most cases you would need aftermarket firmware to enable quieter operation.  Can you ship this directly to my hosting company? Yes, you can either take delivery yourself or ship this to your hosting company by providing their address under the shipping address field on checkout page.  Can you recommend a reputable hosting company? While we do not have our own hosting facility, as a Bitcoin mining hardware vendor, we regularly ship ASIC miners and repair parts to various hosting sites across the US. Here’s a list of some of the companies we’ve worked with:–BSLF Mining-Bounty Hunter Mining–Terra Hosting-Basic MiningThis list is a recommendation and not an endorsement for these hosting companies. Please do your own due diligence, before choosing a colocation host. Who should I contact if there's a problem with my miner? New Antminers come with ~1 year warranty from Bitmain. Please reach out to Bitmain and apply for repair directly with them.  Does this product have a factory warranty? The product is sold new, unopened with a factory warranty unless otherwise requested by the customer to upgrade to aftermarket firmware. Generally, the manufacturer provides a one-year warranty from the manufactured date. The manufacturer warranty period and limitations can be referenced by going directly to their website. For further information and links please view our blog post on warranty. I had less than 1 year warranty on my device when i received it. Why is that? The 1-year warranty on these miners starts from the date the unit ships out from Bitmain, not from the date you receive it. The miner travels through a few stages before it gets to you. It ships from the manufacturer in Asia, then to wholesalers, then to us as the retailer, and finally out to you. Each of those steps takes time, and that time comes out of the original 12-month warranty window. Because of this, most of our miners arrive to customers with somewhere between 6 to 11 months of warranty remaining, and that’s completely normal for this industry, not a defect or an error on our end. For further information and links please view our blog post on warranty. Will aftermarket firmware installation void manufacturer's warranty? Yes, aftermarket firmware installation voids the manufacturer’s warranty. For further information and links please view our blog post on warranty. Is this product covered by Altair Technology’s 14 day Warranty Against Defects? This item is excluded from the Altair Technology’s 14 day warranty. However, the manufacturer does provide a warranty. For more information we recommend referencing the manufacturers most updated policy directly from their website.  What makes the Antminer S21 XP different from other S21 models? The S21 XP is Bitmain’s most efficient air-cooled S21 variant, offering improved joules-per-terahash efficiency and enhanced performance compared to standard S21 and S21 Pro models. This makes it ideal for miners focused on reducing operating costs. What voltage and electrical requirements does the S21 XP have? The Antminer S21 XP typically requires 200–240V input power and proper amperage. Using incorrect voltage may damage the miner. Always confirm electrical compatibility before installation. How much power does the Antminer S21 XP use? Power consumption varies by operating mode, but the S21 XP is optimized for high efficiency per terahash. Actual power draw depends on firmware settings, voltage, and ambient conditions. Is the Antminer S21 XP suitable for home mining? The S21 XP can be used in advanced home mining setups with access to 240V power, proper ventilation, and noise management. However, it is primarily intended for commercial and hosted mining environments. How efficient is the Antminer S21 XP 270T? The Antminer S21 XP operates at approximately 13.5 J/TH (joules per terahash), making it the most efficient air-cooled commercial Bitcoin miner currently available from Bitmain.Higher efficiency means:Lower electricity cost per terahashBetter long-term profitabilityLonger competitive lifespan What is the hashrate of the Antminer S21 XP 270T? The Bitmain Antminer S21 XP delivers 270 TH/s (terahashes per second), making it one of the highest-performance air-cooled Bitcoin miners available in 2026. This level of performance is ideal for commercial mining operations and professional hosting environments. How loud is the Antminer S21 XP? The Antminer S21 XP operates at approximately:75 decibels (dB) Why Buy Your Antminer S21 XP from Altair Technology? We provide:USA-based shippingVerified hardwareTracking and serial numbers providedHosting support available