Product Overview

The Nerdaxe Ultra is a compact, open-source SHA-256 Bitcoin miner and the flagship model in the Nerdaxe hardware series. At approximately 500 GH/s, it delivers meaningful solo Bitcoin mining hashrate from a device that draws less than 15W from a standard USB-C power source. The Nerdaxe Ultra is based on the open BitAxe project framework and is designed for Bitcoin enthusiasts who want real SHA-256 mining capability in an ultra-compact, energy-sipping form factor.

The Nerdaxe series takes the open-source Bitcoin mining concept further than earlier hobbyist miners — the “Ultra” designation reflects its position as the higher-hashrate Nerdaxe variant, using current-generation ASIC chips to achieve its 500 GH/s output. Like all devices in the Nerdaxe/BitAxe family, it runs AxeOS firmware, which is open-source and actively maintained by the Bitcoin community.

For South African Bitcoin enthusiasts, the Nerdaxe Ultra 500Gh represents the sweet spot in the hobby miner space: real Bitcoin SHA-256 hashrate, completely silent operation, and load-shedding immunity through USB power bank backup — all in a device that costs a fraction of commercial ASIC hardware and can fit in a shirt pocket. While 500 GH/s won’t make anyone rich from pool mining, it’s genuine Bitcoin mining participation with exceptional practicality for the South African context.

Key Features

• ~500 GH/s SHA-256 Hashrate: Real Bitcoin mining hashrate at hobbyist scale. Contributes genuine proof-of-work to Bitcoin’s security and can participate in solo mining pools for a lottery chance at the block reward.
• Ultra-Low Power at ~12–15W: Draws less power than a phone charger. Runs from any USB-C 5V power source — no electrical planning, no dedicated circuits, no infrastructure investment whatsoever.
• Open-Source AxeOS Firmware: Runs the community-developed AxeOS firmware with a web-based interface for pool configuration, hashrate monitoring, temperature tracking, and remote management. Configure via any device on your home Wi-Fi network.
• Wi-Fi Connectivity: Connects to your home Wi-Fi (2.4 GHz) for pool connection and remote monitoring. No Ethernet cable required.
• Completely Silent: No fans, no moving parts. Passively cooled — runs in complete silence suitable for any home environment.
• Compact and Portable: Small PCB form factor fits anywhere. Carry it in a pocket, place it on a desk, or mount it anywhere there’s a USB power source.
• Community-Supported Project: Built on the open-source BitAxe/Nerdaxe ecosystem with an active community of developers, miners, and enthusiasts sharing firmware updates, configurations, and hardware improvements.

Technical Specifications

• Algorithm: SHA-256
• Supported Coins: Bitcoin (BTC) and SHA-256 cryptocurrencies
• Hashrate: ~500 GH/s
• Power Consumption: ~12–15W
• Cooling: Passive (silent)
• Input Power: USB-C 5V
• Networking: Wi-Fi (2.4 GHz)
• Firmware: AxeOS (open-source)
• Hardware Design: Open-source (Nerdaxe project)

Power & Installation Notes

The Nerdaxe Ultra 500Gh requires absolutely no electrical planning or installation work. At 12–15W from USB-C 5V input, it runs from any standard USB wall charger, laptop USB port, power bank, or USB solar charger. In South Africa, plug it into any 5V USB-C adapter connected to a standard wall socket — no electrician, no dedicated circuit, nothing special required.

South Africa’s 230V / 50Hz mains voltage is handled by any USB-C wall adapter — the Nerdaxe Ultra itself only ever sees 5V DC from the USB-C connection. All standard USB-C power adapters sold in South Africa (including phone chargers) are compatible.

Load shedding is a complete non-issue. At 12–15W, a standard 20,000 mAh USB power bank (approximately 72 Wh) can power the Nerdaxe Ultra for approximately 5–6 hours. A 10 kWh home battery system could run it for over 600 hours continuously. The Nerdaxe Ultra is among the most load-shedding-resilient Bitcoin mining devices available anywhere.

Operating temperature is minimal — the device generates very little heat through passive cooling. Room temperature operation is fine. Avoid enclosing it in fully airtight containers but otherwise no special thermal management is needed.

Electricity Cost Context — South Africa

At Eskom’s approximate residential reference tariff of R2.80/kWh, the monthly electricity cost for the Nerdaxe Ultra 500Gh is estimated as follows:

(13 ÷ 1,000) × 24 × 30 × 2.80 = R26.21 per month

This is an operating cost estimate only — not a profitability projection. At approximately R26/month in electricity, the Nerdaxe Ultra has negligible operating costs. The device won’t produce meaningful income from pool mining at 500 GH/s, but for solo mining participants and Bitcoin enthusiasts, the R26/month electricity cost is a trivial price for continuous participation in the Bitcoin network.

Ideal Use Cases

• Solo Bitcoin mining lottery: The primary purpose for many Nerdaxe Ultra owners is pointing it at a solo pool like CK Solo Pool for the ultra-long-shot chance of solving a Bitcoin block and claiming the full block reward. At 500 GH/s, the probability is extremely remote but the device runs 24/7 at R26/month — it’s the cheapest lottery ticket in crypto.
• Bitcoin education and hands-on learning: The open-source AxeOS firmware, community resources, and accessible hardware make the Nerdaxe Ultra an excellent learning platform for anyone wanting to understand Bitcoin mining at a technical level.
• Load-shedding-immune Bitcoin participation: For South Africans who want to continue Bitcoin mining through load shedding with zero additional infrastructure, the Nerdaxe Ultra runs for hours on any USB power bank.
• Desk or office Bitcoin mining: Completely silent and drawing minimal power — the Nerdaxe Ultra can run on any desk, bookshelf, or workspace without anyone noticing it’s there, silently contributing to Bitcoin’s proof-of-work.

Frequently Asked Questions

Does the Nerdaxe Ultra work on South African power?
Yes. It runs from any standard USB-C 5V power adapter, including all South African phone chargers and USB wall adapters. No special electrical setup required.

What is the difference between the Nerdaxe Ultra and the BitAxe Gamma 601?
The BitAxe Gamma 601 achieves approximately 1.2 TH/s (2.4× more hashrate) using the BM1370 chip from the S21 Pro series. The Nerdaxe Ultra achieves ~500 GH/s. The Gamma 601 is the higher-hashrate option; the Nerdaxe Ultra is similarly silent and USB-powered. Both are open-source.

Can I pool mine with the Nerdaxe Ultra?
Yes. The AxeOS firmware supports major SHA-256 pools. Configure your preferred pool’s stratum URL through the web interface on your home Wi-Fi network. Most users point it at a public solo pool for the solo mining experience.

How does it handle load shedding?
Exceptionally well. At 12–15W, a 20,000 mAh power bank provides approximately 5–6 hours of runtime — covering standard South African load-shedding cycles. It’s essentially load-shedding-immune.

Is the Nerdaxe Ultra genuinely mining Bitcoin?
Yes. It performs real SHA-256 proof-of-work and submits valid shares to the Bitcoin network via your configured pool. The hashrate is genuine, though modest. For solo mining, it contributes real work toward the remote possibility of solving a block.

What’s Included

• 1× Nerdaxe Ultra 500Gh mining unit (pre-assembled)
• USB-C power cable (confirm inclusion at time of purchase)
• Quick-start documentation