目錄
1. 高階主管概況
Antminer S21 Review 2025,Bitmain began shipping the Antminer S21 in October 2024. Eight months later, public pool dashboards show 78 412 active S21 units on Foundry, Antpool and ViaBTC combined—making it the fastest ramp-up since the S9 era. Our lab logged 30-day continuous runs on six different firmware versions and cross-checked results with 1 038 owner surveys collected through June 2025.
Bottom line: at 17.5 焦耳/天, the S21 is 41 % more efficient than the S19j Pro and still nets positive daily cash-flow above 9 ¢/kWh at today’s difficulty and BTC price ($66 200).
In our latest Antminer S21 Review, we explore its efficiency and performance metrics that set it apart in the market.
Conclusively, the Antminer S21 Review has established itself as a must-read for those looking to optimize their mining setup.
2. 與上一代產品相比的規格表
Each detail in the Antminer S21 Review reinforces its standing in today’s competitive mining landscape.
According to our Antminer S21 Review, the device outperforms previous models in both hashrate and energy consumption.
| 公制 | 螞蟻礦機 S21 | 秒19j Pro | Δ |
|---|---|---|---|
| 哈希率 | 200 TH/s ±3 % | 104 TH/s | +92 % |
| Wall Power | 3 500 W ±5 % | 3 068 W | +14 % |
| 效率 | 17.5 焦耳/天 | 29.5 焦耳/小時 | –41 % |
| Noise @ 1 m | 75 分貝 | 82分貝 | –7 dB |
| 重量 | 15.4公斤 | 14.6 kg | +5 % |
| Price (retail) | $4 999 | (EOL) | — |
The Antminer S21 Review indicates that at high efficiency, it significantly impacts profitability for Bitcoin miners.
3.每日獲利圖表（BTC@$66 200，難度83T）
| Power Rate | Gross Income | Power Cost | Net Profit/Day | Payback (365 d avg) |
|---|---|---|---|---|
| $0.04 kWh | $19.80 | $3.36 | $16.44 | 304 d |
| $0.08 kWh | $19.80 | $6.72 | $13.08 | 382 d |
| $0.12 kWh | $19.80 | $10.08 | $9.72 | 514 d |
Chart built from NiceHash Profitability API 15 July 2025.
Observations: even at 12 ¢/kWh—the commercial rate in parts of North America—the 螞蟻礦機 S21 still clears almost $10/day.
4. 深入硬體
4.1 算力板和晶片組
Each of the three hashboards carries 88 BM1368 chips on a refined 5 nm TSMC node. Thermal imaging shows hot-spots at 76 °C (ambient 35 °C) versus 88 °C on the S19j Pro under identical airflow—a direct result of reduced voltage (0.28 V core vs 0.34 V).
4.2 冷卻升級
Instead of the dual-fan S19 layout, the 螞蟻礦機 S21 uses four 120 mm PWM fans in push-pull. The redesigned shroud drops static pressure loss by 18 %, allowing slower RPM and cutting noise by 7 dB. Our sound meter logged 74.8 dB at 100 % duty cycle 1 m away.
4.3 電源和電能質量
Ultimately, the Antminer S21 Review confirms that its specifications are tailored for serious miners seeking efficiency.
The included APW12-2210b PSU is rated 2210 W @ 220 V but the 螞蟻礦機 S21 draws 3 500 W peak. Bitmain therefore ships a twin-PSU harness (2 × 2210 W) to stay within 80 % load spec. Power-factor readings averaged 0.98, well above the 0.95 required by most colocation facilities.
The Antminer S21 Review highlights the latest advancements in technology and their impact on mining profitability.
5. 韌體和超頻空間
| Firmware | Avg Hashrate | Wall Power | 效率 | 筆記 |
|---|---|---|---|---|
| Stock (Bitmain 2025-03-20) | 200 TH/秒 | 3 500 W | 17.5 焦耳/天 | Baseline |
| HiveOn 2025-06-14 | 214 TH/s | 3 720 W | 17.4 J/TH | +7 % freq, +6 % power |
| Braiins 2025-06-28 | 221 TH/s | 3 980 W | 18.0 J/TH | Autotune, +4 % profit |
| Low-Power Mode | 160 TH/s | 2 550 W | 15.9 J/TH | –20 % power, –12 % revenue |
Key takeaway: Braiins autotune adds 4 % net profit but pushes PSU load to 99 %—ensure adequate circuit headroom.
6. 可靠性和故障日誌（1038名船東調查）
This Antminer S21 Review highlights how the new design contributes to improved cooling and overall reliability.
For those interested, our Antminer S21 Review dives deeper into user experiences and testimonials from early adopters.
| Issue | Incidence Rate | Typical Fix Time |
|---|---|---|
| Fan bearing rattle | 4.8 % | 15 min swap |
| Hashboard thermal sensor fault | 2.1 % | RMA 5–7 d |
| PSU fan failure | 1.3 % | 10 min swap |
| No major failure after 90 d | 91.8 % | — |
Mean Time Between Failure (MTBF) is tracking at 12 400 hours, 38 % higher than the S19 series.
7. 安裝和使用者體驗
7.1 物理設置
在 400 × 195 × 290 毫米, the 螞蟻礦機 S21 fits standard 19-inch racks with 3U spacing. The single 10-pin data cable plus two C19 power cords simplify cabling versus older split-cable designs.
7.2 Web 介面
Bitmain’s new Antminer Tool v3 auto-detects miners on the subnet and pushes firmware via drag-and-drop. The dashboard now displays ASIC health per chip, not per board—a boon for diagnostics.
7.3 遠端管理
All polled owners rated remote access via Antminer Monitor API 4.6/5. Commands include pool failover, fan curve and reboot—no SSH keys required.
For further purchasing insights, refer to the Antminer S21 Review that aligns price points with performance expectations.
8. 價格和市場供應情況
In essence, this Antminer S21 Review provides a comprehensive look at the model’s operational capabilities.
| Channel | July 2025 Quote | Shipping Lead | 筆記 |
|---|---|---|---|
| Bitmain Direct | $4 999 MOQ 5 | 5–7 d | Includes PSU |
| Alibaba (verified) | $4 400–$4 700 | 14–21 d | Bulk only |
| EU/US Distributors | $5 400–$5 800 | 庫存 | 本地保固 |
值得注意的是，Antminer S21 評論討論了能源效率，這是具有成本效益的採礦策略的關鍵因素。
9. 環境影響與碳足跡
使用全球電網混合平均值 0.463 公斤二氧化碳/千瓦時，一個 S21 發射 每年1.62噸二氧化碳在水力資源豐富的四川省（0.15 公斤二氧化碳/千瓦時），這一數字下降到 0.52噸/年，強調了再生能源對於注重 ESG 的礦工的重要性。
10. 結論：誰該購買 螞蟻S21?
因此，Antminer S21 評論對於新手和經驗豐富的礦工來說都是重要的資源。
購買條件：
- 您的電費是 ≤$0.10度 或者你有 擱淺電力.
- 你需要 最大密度 在共置籠中。
- 您計劃 長期持有BTC 並希望獲得目前最低的 J/TH。
如果出現以下情況則跳過：
- 噪音是一個問題（75 分貝仍然很響，就像吸塵器的噪音一樣）。
- 您的設施無法送貨 16 安 @ 240 伏 每單位。
投資報酬率總結：在中等商業用電 ($0.08 kWh) 下，S21 的報酬為 ~380天— 目前任何 ASIC 中最短的投資回收期，且已證實具有大規模可用性。
正如我們在 Antminer S21 評論中所詳述的那樣，該設備在極短的時間內就收回了成本。
11. 附錄：測試方法
- 測試地點：亞利桑那沙漠，環境溫度 35 °C，20 % RH。
- 電力計量：橫河 WT310E 校準精度在 0.1 % 以內。
- 水池：Foundry USA，1 % 費用，99.9 % 正常運作時間。
- 數據記錄：Grafana + Prometheus 每 30 秒一次，持續 30 天。
- 民調：Google Forms透過Telegram和Reddit挖礦群分發，有效回覆1038份。
總而言之，Antminer S21 評測展示了它在當前市場中如何在競爭對手中脫穎而出。
12. 來源
- 比特大陸官方規格，2025 年 3 月
- ECOS 績效報告，2025 年 6 月
- NiceHash 獲利能力 API，2025 年 7 月 15 日
- 業主調查原始數據，2025 年 7 月（可根據要求提供 CSV 格式）
總的來說，Antminer S21 評論中的這些見解將指導用戶最大限度地提高他們的挖礦作業。
如果你想買 便宜的螞蟻 S21 礦機，我們的平台可以隨時購買，沒有任何風險！ 去商店