Bitaxe Ultra 205 — ربحية التعدين
نظرة عامة
The Bitaxe Ultra 205 is the entry point of the open-source Bitaxe family, released June 2023. It runs a single Bitmain BM1366 chip recovered from S19 XP hashboards — 0.4 TH/s at 30 J/TH on 12 W. Licensed under CERN-OHL-S-2.0 with full schematics, BOM, and firmware on GitHub (skot/bitaxe), the Ultra is the most accessible Bitaxe build: USB-C powered, sub-$130 hardware cost, no special cooling required. It is a sovereignty, education, and lottery participation device, not a profit-driven miner. Common deployments: home solo mining via public-pool.io or solo.ckpool.org, hackerspace and school workshops, and as a tangible counterweight to mining centralization. Within the Bitaxe lineup the Ultra sits below the Supra (0.7 TH/s) and the Gamma 601 (1.2 TH/s, 12.5 J/TH).
عرض المسرد →المواصفات
الهاشريت
0.4 TH/s
الطاقة
12W
الكفاءة
30 J/TH
التبريد
Air
تاريخ الإصدار
June 2023
الشركة المصنعة
Bitaxe (open source)
الربحية المباشرة
تأثير halving 2028
The April 2028 halving cuts the block subsidy from 3.125 to 1.5625 BTC. For pool mining, daily revenue mechanically halves: ~$0 today, ~$0 post-halving. For solo lottery mining via solo.ckpool.org, the lottery odds themselves don't change — they are hashrate-relative — but the prize halves: 1.5625 BTC + transaction fees per block instead of 3.125 BTC + fees. At plausible BTC prices in the 2028 window ($80–120k), an Ultra 205 block hit still pays $125–190k — a life-changing event for a $130 hobby device. The Ultra's role as an educational kit and a sovereign participation tool is independent of the halving.
عرض العد التنازلي للـ halving →قارن مع الموديلات المماثلة
FutureBit Apollo II
9 TH/s · 22.2 J/TH · Air
Bitaxe Supra 401
0.7 TH/s · 21.4 J/TH · Air
Lucky Miner LV07
0.6 TH/s · 20 J/TH · Air
الأسئلة الشائعة
What can I expect when running a Bitaxe Ultra 205?▾
Three layers, same shape as any Bitaxe: (1) Pool mining via public-pool.io: ~$0/day at the current hashprice — essentially symbolic. (2) Solo lottery mining via solo.ckpool.org: no daily payout, but a long-tail probability of a full block hit (3.125 BTC + fees today, ~$300k+ at current BTC price). (3) Educational and sovereignty value: a hands-on entry into the Bitcoin protocol stack, soldering and firmware tinkering, and a tangible vote against mining centralization. The Ultra is the cheapest way to participate; most owners run it for layer 3 with the lottery as a long-tail bonus.
What does it cost to run a Bitaxe Ultra 205?▾
Hardware: ~$130 retail, $80–110 second-hand or DIY. Electricity: 12 W × 24h × 365 days = 105 kWh/year. At $0.10/kWh that is $11/year, at $0.20/kWh $21/year. Network: any Wi-Fi or Ethernet connection. Cooling: a small heatsink, no fan needed for most builds. Total year-1 cost ~$140–155 — the cheapest Bitaxe to own and operate. Pool revenue covers a small fraction of electricity at retail rates; below $0.04/kWh you reach electricity break-even.
What are the real solo lottery odds with a Bitaxe Ultra 205?▾
Solo mining is a Poisson lottery: your chance of finding a block is your hashrate ÷ network hashrate, multiplied by 144 blocks/day. With the Ultra 205 at 0.4 TH/s against ~600 EH/s, that is ~0.0000096% per day, or ~0.0035% per year (1 in ~28,500). The mean time to a hit is ~28,500 years on average — that's the average, not a deadline; the Poisson tail leaves a non-zero chance any given month. Solo block hits with low-hashrate gear get reported on solo.ckpool.org and public-pool.io block feeds. The Ultra has the longest odds in the Bitaxe lineup; if maximizing solo lottery odds matters, the Gamma 601 (1.2 TH/s) is roughly 3× better.
How do I set up solo mining with a Bitaxe Ultra 205?▾
Flash AxeOS firmware (skot/esp-miner on GitHub) — most retail Ultras ship pre-flashed. Plug the USB-C cable in, connect via Wi-Fi or Ethernet through the AxeOS web setup. Configure your pool: stratum+tcp://solo.ckpool.org:3333 for true solo lottery (full block reward to you if your hashrate finds the block), or stratum+tcp://public-pool.io:21496 for low-fee solo-style pooled rewards. The username is your BTC address — that's where any reward lands. Save and the Ultra starts hashing within seconds. The AxeOS dashboard shows live hashrate, accepted shares, current network target, and chip temperature. Total setup time: ~5 minutes.
Bitaxe Ultra 205 vs Bitaxe Gamma 601 — should I upgrade?▾
The Gamma 601 delivers 1.2 TH/s at 12.5 J/TH (15 W) using the BM1370 chip from S21 Pro hashboards. Versus the Ultra 205 (0.4 TH/s, 30 J/TH, 12 W): three times the hashrate, ~2.4× better efficiency, marginally higher power draw. For solo lottery odds, the Gamma is dramatically better — ~3× higher probability per day. For a fresh build today, the Gamma 601 is the obvious pick. The Ultra remains relevant for budget-constrained beginners, classroom kits, and the smallest possible USB-C deployments. Both share the same firmware (esp-miner) and CERN-OHL-S-2.0 license.