{"product_id":"used-s21-hashboard-40th-785-watts","title":"S21 Hashboard for DIY Home Miners | Up To 44 TH\/s","description":"\u003cp data-start=\"66\" data-end=\"174\"\u003eWant to build a \u003cstrong data-start=\"82\" data-end=\"120\"\u003ehigh-efficiency home Bitcoin miner\u003c\/strong\u003e without spending thousands on a full commercial unit?\u003c\/p\u003e\u003cdiv style=\"border:1px solid rgba(128,128,128,0.35); border-radius:8px; padding:14px 18px; margin:14px 0;\"\u003e\n\u003cp style=\"margin-top:0;\"\u003e\u003cstrong\u003eAt a glance\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul style=\"margin-bottom:0;\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eWhat this is:\u003c\/strong\u003e a genuine used Antminer S21 hashboard — tested and guaranteed working on arrival\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePotential:\u003c\/strong\u003e up to ~55 TH\/s from a single board with proper tuning, cooling, power delivery, and controller\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBoard only\u003c\/strong\u003e — no PSU, control board, fans, or cables\u003c\/li\u003e\n\u003cli\u003ePairs with our \u003ca href=\"\/products\/poor-mans-avalon-q-enclosure-kit\"\u003eAvalon Q enclosure kit\u003c\/a\u003e and \u003ca href=\"\/products\/nakamoto-mining-case-high-efficiency-diy-bitcoin-miner-enclosure-for-s19-s21-hashboards\"\u003eNakamoto Mining Case\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAll sales final\u003c\/strong\u003e on used mining hardware\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cp data-start=\"176\" data-end=\"385\"\u003eThis genuine Antminer S21 hashboard is the core component behind the latest generation of DIY “Poor Man’s Avalon Q” style builds — giving home miners access to modern ASIC efficiency in a compact custom setup.\u003c\/p\u003e\n\u003cp data-start=\"387\" data-end=\"498\"\u003e🔥 \u003cstrong data-start=\"390\" data-end=\"428\"\u003eUp to ~55 TH\/s from a SINGLE board\u003c\/strong\u003e\u003cbr data-start=\"428\" data-end=\"431\"\u003e(with proper tuning, cooling, power delivery, and controller setup)\u003c\/p\u003e\n\u003cp data-start=\"500\" data-end=\"623\"\u003eThis is NOT a toy miner.\u003cbr data-start=\"524\" data-end=\"527\"\u003eThis is serious modern ASIC hardware for builders, tinkerers, and solo miners looking to create:\u003c\/p\u003e\n\u003cul data-start=\"624\" data-end=\"770\"\u003e\n\u003cli data-section-id=\"1ujf1te\" data-start=\"624\" data-end=\"654\"\u003eCompact high-hashrate miners\u003c\/li\u003e\n\u003cli data-section-id=\"1v8hm53\" data-start=\"655\" data-end=\"686\"\u003eQuiet\/custom enclosure builds\u003c\/li\u003e\n\u003cli data-section-id=\"97t7k\" data-start=\"687\" data-end=\"716\"\u003eOpen-source mining projects\u003c\/li\u003e\n\u003cli data-section-id=\"c5e7ti\" data-start=\"717\" data-end=\"741\"\u003eHome lab mining setups\u003c\/li\u003e\n\u003cli data-section-id=\"u0iybv\" data-start=\"742\" data-end=\"770\"\u003eEfficient solo mining rigs\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"772\" data-end=\"1090\"\u003e🛠️ PERFECT FOR DIY “POOR MAN’S AVALON Q” BUILDS\u003cbr\u003eInstead of buying an expensive turnkey miner, build your own:\u003cbr\u003e✅ S21-class performance\u003cbr data-start=\"906\" data-end=\"909\"\u003e✅ Lower power usage than older generations\u003cbr data-start=\"951\" data-end=\"954\"\u003e✅ Massive hashrate density\u003cbr data-start=\"980\" data-end=\"983\"\u003e✅ Custom airflow + cooling setups\u003cbr data-start=\"1016\" data-end=\"1019\"\u003e✅ 3D printed enclosure projects\u003cbr data-start=\"1050\" data-end=\"1053\"\u003e✅ Rackmount or desktop-style miners\u003c\/p\u003e\n\u003cp data-start=\"1092\" data-end=\"1238\"\u003eWhen paired with the right PSU, controller, and cooling solution, these boards can deliver incredible performance for DIY home mining enthusiasts.\u003c\/p\u003e\n\u003cp data-start=\"1240\" data-end=\"1266\"\u003e⚠️ IMPORTANT — PLEASE READ\u003c\/p\u003e\n\u003cul data-start=\"1267\" data-end=\"1494\"\u003e\n\u003cli data-section-id=\"20nw3e\" data-start=\"1267\" data-end=\"1297\"\u003eThis is a \u003cstrong data-start=\"1279\" data-end=\"1287\"\u003eUSED\u003c\/strong\u003e hashboard\u003c\/li\u003e\n\u003cli data-section-id=\"5do3cy\" data-start=\"1298\" data-end=\"1353\"\u003eBoard is \u003cstrong data-start=\"1309\" data-end=\"1353\"\u003eTESTED and GUARANTEED TO WORK on arrival\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"d552x\" data-start=\"1354\" data-end=\"1370\"\u003eSold \u003cstrong data-start=\"1361\" data-end=\"1370\"\u003eAS-IS\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1ruc792\" data-start=\"1371\" data-end=\"1434\"\u003eCosmetic wear, scratches, dust, or prior-use marks are normal\u003c\/li\u003e\n\u003cli data-section-id=\"untwzp\" data-start=\"1435\" data-end=\"1494\"\u003eDue to the nature of mining hardware, ALL SALES ARE FINAL\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1496\" data-end=\"1508\"\u003e📦 Includes:\u003c\/p\u003e\n\u003cul data-start=\"1509\" data-end=\"1549\"\u003e\n\u003cli data-section-id=\"ry9did\" data-start=\"1509\" data-end=\"1549\"\u003e(1) Tested Antminer S21 hashboard only\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1551\" data-end=\"1570\"\u003e❌ Does NOT include:\u003c\/p\u003e\n\u003cul data-start=\"1571\" data-end=\"1646\"\u003e\n\u003cli data-section-id=\"1o4oda\" data-start=\"1571\" data-end=\"1576\"\u003ePSU\u003c\/li\u003e\n\u003cli data-section-id=\"1gjw9ud\" data-start=\"1577\" data-end=\"1592\"\u003eControl board\u003c\/li\u003e\n\u003cli data-section-id=\"1j455le\" data-start=\"1593\" data-end=\"1599\"\u003eFans\u003c\/li\u003e\n\u003cli data-section-id=\"zf2kbi\" data-start=\"1600\" data-end=\"1625\"\u003eHeatsinks\/modifications\u003c\/li\u003e\n\u003cli data-section-id=\"1vboafm\" data-start=\"1626\" data-end=\"1637\"\u003eEnclosure\u003c\/li\u003e\n\u003cli data-section-id=\"1uy0g5u\" data-start=\"1638\" data-end=\"1646\"\u003eCables\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1648\" data-end=\"1838\" data-is-last-node=\"\" data-is-only-node=\"\"\u003e🚀 Whether you’re building a custom solo miner, experimenting with ultra-efficient home mining, or creating your own next-gen “Poor Man’s Avalon Q”… this S21 board is the perfect foundation.\u003c\/p\u003e","brand":"Engineering The Odds","offers":[{"title":"Default Title","offer_id":48068938170627,"sku":null,"price":380.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0815\/8255\/5395\/files\/S21-Hashboard.jpg?v=1778021155","url":"https:\/\/engineeringtheodds.com\/products\/used-s21-hashboard-40th-785-watts","provider":"Engineering The Odds","version":"1.0","type":"link"}