Bitcoin Mining FAQ: Straight Answers to the Questions People Actually Ask
Quick answer
This hub gathers the Bitcoin-mining questions we hear most — profitability, home mining, hardware, firmware, heat, Canadian tax, sovereign AI, and network security — each answered in a few plain sentences that link to the full D-Central guide behind it. Every answer restates a page we have already published and verified; nothing here is new or unsourced.
Skim the question that matches your situation, read the short answer, then follow the link for the depth. Start mining, or go deeper — your call.
Getting started
What is a Bitaxe?
The Bitaxe is an open-source, single-chip Bitcoin miner you build and run yourself — silent, low-power, and the friendliest way to learn how mining actually works. It is a genuine network participant, not a toy. Read more: Bitaxe complete guide →
Can I mine Bitcoin at home?
Yes — anything from a USB-powered Bitaxe for solo-lottery mining to an Antminer S21 heating a garage. The key is matching the hardware to your electrical capacity, noise tolerance, and budget, then sorting location, cooling, and pool setup. Read more: home mining guide →
Should I mine Bitcoin or just buy it (DCA)?
Neither wins outright — many Bitcoiners do both. DCA is simple, predictable accumulation; mining stacks sats plus KYC-free coins and a sovereignty no spreadsheet captures, but it needs cheap power, space, and technical comfort. Read more: mining vs DCA →
Profitability
Is Bitcoin mining still profitable in 2026?
It depends most on your electricity rate. Efficient modern ASICs can profit on cheap power; older units profit mainly when their heat has real value. Run your own numbers with our profitability calculator before buying anything. Read more: profitability calculator →
FPPS vs PPS vs PPLNS vs TIDES — which pool payout method?
Your pool’s payout method decides your earnings. FPPS pays a steady rate including transaction-fee revenue; PPS pays the block subsidy only; PPLNS rewards loyalty but swings with luck; TIDES pays transparently from the coinbase, non-custodially. Read more: payout methods explained →
What is the most efficient Bitcoin miner?
Hydro-cooled flagships lead — the Antminer S23 Hyd (~9 J/TH) and S21 XP Hyd (~12 J/TH) — with the air-cooled S21 XP and Avalon A16 XP near 12–13 J/TH. For quiet home mining, the Bitaxe Gamma runs under 30 dB. Read more: ASIC efficiency frontier →
Hardware
ASIC vs FPGA vs GPU vs CPU — why do ASICs win?
For Bitcoin’s SHA-256 proof-of-work, ASICs win decisively — purpose-built silicon out-hashing CPUs, GPUs, and FPGAs by orders of magnitude per watt. General chips stay flexible but cannot survive mining’s relentless efficiency pressure. Read more: ASIC vs FPGA vs GPU vs CPU →
Bitaxe vs Antminer S9 — which should a home miner buy?
It depends what you want. The Bitaxe is a silent, ultra-efficient, fully open-source learning machine for your desk; a refurbished S9 is the loud, cheap-terahash workhorse that doubles as a heater. Either way you are a sovereign participant. Read more: Bitaxe vs Antminer S9 →
Firmware
What is DCENT_OS?
DCENT_OS is D-Central’s public-beta replacement firmware for Bitmain Antminer hardware, written in Rust on Buildroot Linux under GPL-3.0. It targets full-size industrial ASICs, not Bitaxe. Beta carries real risk — a bad flash can brick a miner. Read more: DCENT_OS firmware →
Which mining firmware should I choose?
Match your model first: BraiinsOS+ leads on industrial Antminers with native Stratum V2; AxeOS runs the Bitaxe; DCENT_OS is D-Central’s GPL-3.0 public beta for Antminer. Use the firmware selector to match your model and see what Bitmain has locked. Read more: firmware selector →
Heat & home
Can a Bitcoin miner heat my home?
Yes — an ASIC turns nearly 100% of its electricity into heat (1 W ≈ 3.412 BTU/hr), so a Space Heater edition warms a room while earning sats. Size it to the room and manage the noise. Read more: Bitcoin space heaters →
GPU heat vs ASIC heat — which heats a room better?
Both turn nearly all their watts into heat. For heating a room the ASIC wins — it runs flat-out 24/7 for steady warmth plus a Bitcoin rebate. A GPU only heats while loaded with AI work, so its heat is a bonus to the compute. Read more: GPU vs ASIC heat →
Legal & tax (Canada)
How is Bitcoin mining taxed in Canada?
Mined Bitcoin is generally taxed when received (whether it is business or hobby income depends on your facts), and disposing of it later triggers capital gains or losses. This is general information grounded in the statutes — not tax advice. Read more: Canadian mining income tax →
Do Canadian miners charge or reclaim GST/HST?
Under Excise Tax Act s.188.2, Bitcoin mining is treated as “not a supply” — so mining rewards are not taxable supplies, but that also denies input tax credits on your rigs and power. See the statute-grounded guide. Read more: GST/HST for miners →
Sovereign AI
Local AI vs Cloud AI — which should I use?
It depends on the job. Cloud AI is still smarter at the frontier and cheaper for light use. Local AI is private by construction, cannot be switched off from someone else’s boardroom, and for steady work it pays for itself. Read more: local vs cloud AI →
What is a local LLM?
A local LLM is a large language model that runs on a computer you own, with no prompt or document leaving the machine. Open-weight families like Llama, Qwen, Gemma, Mistral, and DeepSeek handle most real work; VRAM scales from ~8 GB for a 7–8B model. Read more: local LLMs in Canada →
Network security
How much would it cost to 51%-attack Bitcoin?
You would need roughly as much hashrate as the entire network already runs — millions of the most efficient ASICs drawing gigawatts. Renting has a theoretical floor near total network mining revenue; acquiring the fleet runs into the billions. Model it live. Read more: 51%-attack cost calculator →
What can a 51% attacker actually do?
A 51% attacker can double-spend their own recent transactions and censor or reorg blocks. They cannot steal other people’s coins, mint new coins, or change Bitcoin’s rules. It buys temporary control, not ownership of the network. Read more: 51% attack (glossary) →
Repair & local (Canada)
Where can I get an ASIC or Antminer repaired in Canada?
D-Central runs an in-house ASIC repair bench in Montreal, Quebec — diagnostics, board-level micro-soldering, firmware recovery and thermal service for Antminer, Whatsminer, Avalon and more, servicing miners since 2016. Ship yours in from anywhere in Canada; flat-rate tiers, diagnostic first. Read more: ASIC repair service →
Who builds Bitcoin miners in Quebec?
D-Central hand-builds open-source Bitaxe miners (Gamma, Supra) and refurbishes industrial ASICs to order from its Montreal, Quebec shop — bench-tested hardware, Canadian-dollar pricing, and bilingual English/French support, not an Amazon warehouse. Read more: buy a Bitaxe in Canada →
Related products, repair, and setup paths
- how D-Central diagnoses ASIC repairs
- ASIC troubleshooting library
- ASIC manuals and repair guides
- replacement hashboards
- ASIC control boards
- ASIC power supplies
- immersion cooling hub
- home immersion cooling guide
- ASIC miners for immersion planning
- ASIC cooling parts
- airflow shroud before immersion
- compare miner specs in the database
- ASIC repair support
- compare ASIC miner specs
- ASIC miner database
- Antminer S21 specs
- Bitmain Antminer S21
- Antminer S21 maintenance guide
- BM1370BC S21 Pro chip
- Antminer S9 specs
- Bitmain Antminer S9
- Antminer S9 maintenance guide
- S9 hashboard repair parts bundle
- Whatsminer M30S specs
- Whatsminer repair guide
- MicroBT Whatsminer M30S++
- Whatsminer M3x exhaust shroud
- Avalon (Canaan) hashboard repair
- start a repair request
- ASIC repair parts
Last reviewed July 21, 2026.