Before you click buy, make sure you understand these factors. If you skip any, you’re increasing risk of a bad ROI (or outright loss).
| Factor | Why It Matters |
|---|---|
| Hash rate (TH/s for Bitcoin-SHA256) | Determines how many hashes your rig can compute per second — higher means more chance at block rewards (or pool rewards). |
| Power consumption (Watts) & efficiency (Joules per TH) | Electricity cost is often the biggest drag on profit. A rig that uses 3,000 W at home may cost you hundreds of dollars/month just in power. Core Scientific+2ASIC Miner Value+2 |
| Cost / upfront investment | The miner price + shipping + power infrastructure = your capital outlay. If it’s too high, ROI may be long or never. rhinobitcoin.com+1 |
| Noise / heat / cooling / environment | These rigs are loud and hot. Ideal for industrial / dedicated setups—not for your living room, unless you like sleeping with a jet engine. CoinWarz |
| Voltage / electrical setup compatibility | Some rigs require 220 V, industrial power, special wiring. If you’re in a home setup, check that you can supply it. CoinWarz+1 |
| Delivery / seller reliability | On Amazon (and elsewhere) there are scams, fakes, delayed shipments. One mining-forum user said: |
“Ordered S19J … Received a cow miner.” Reddit+1 |
| Mining algorithm / coin choice | Most of these are SHA-256 for Bitcoin/BCH/BSV. If you buy a generic “ASIC” for an obscure altcoin, risk is higher. |
| Ongoing difficulty, coin price, electricity cost | Even a “good” miner today may become unprofitable if network difficulty rises or coin price drops. WhatToMine+1 |
Bottom line: It’s not just buy a miner and watch the money roll in. The variables matter. Many home miners lose money because of electricity or because difficulty/price move against them. Reddit+1
Five ASIC Miners (Amazon listings) — my picks
Here are five models I found on Amazon listings (or with Amazon presence).
| # | Model | Hash Rate / Power | Key Pros | Key Cons |
|---|---|---|---|---|
| 1 | Bitmain Antminer S19 (various) | Example: 86 TH/s @ ~2,967 W (from listing) Amazon+1 | High recognized brand, widely used | Requires high power draw, likely higher upfront cost |
| 2 | Antminer S19k Pro 120T (OEMGMINER listing) | 120 TH/s @ ~2,760 W (23 W/TH claimed) Amazon | Better efficiency claim (23 W/TH) | “OEMGMINER” seller – not necessarily direct Bitmain; check authenticity |
| 3 | Canaan Avalon Nano 3S | 6 TH/s @ 140 W (from Amazon listing) (approx) | Low power / small scale – maybe home‐friendly. | Low hash rate: might take very long to recoup costs; maybe more for hobby than profit |
| 4 | A generic ASIC miner listing (Amazon search) “ASIC Miner” category | Varies: many low cost / low efficiency devices from Amazon search page | Lower entry cost / attempt at mining for less investment | Risk: might be low efficiency, imported, poor warranty; profit margin may be minimal or negative |
To help you compare, here’s a comparison table of the five above (make sure you verify actual listing specs when you click):
| Model | Hash Rate (est) | Power Consumption | Efficiency (W per TH) | Suitable For | Approx ROI Risk |
|---|---|---|---|---|---|
| Antminer S19 (86 TH/s) | ~86 TH/s | ~2,967 W | ~34.5 W/TH | Serious home/semi‐industrial miner | Medium‐High risk (because power cost large) |
| Antminer S19k Pro 120T | ~120 TH/s | ~2,760 W | ~23 W/TH | Better efficiency | Lower risk (assuming power cost low) |
| Avalon Nano 3S | ~6 TH/s | ~140 W | ~23.3 W/TH | Hobby/home use | High risk (very small hash) |
| Generic Budget ASIC | Unknown but lower tier | Varies, likely higher W/TH | Likely poor efficiency | Entry / experiment | Very high risk |
Note: The ROI risk depends heavily on your electricity cost, coin mined, pool fees, difficulty trends, and setup cost (cooling, soundproofing, etc). Even a “good” machine can lose money if your power cost is high.
My pick & recommendation
I would not buy the cheapest “ASIC miner on Amazon” and expect great profits. Instead:
- Stick to established brands (Bitmain, Canaan) so you have better chance of support / parts / resale value.
- Calculate your electricity cost up front: e.g., if you pay $0.12 per kWh, a 3,000 W machine running 24/7 uses ~72 kWh/day → ~$8.64/day in power alone.
- Consider noise/heat: If it’s in your house or apartment, you’ll hate it; better in a dedicated space or outsourced hosting.
- Consider hosting: Many miners host rigs in large warehouses with cheaper power; your home may not be ideal.
- Accept that ROI might be years or might not happen; coin price/difficulty could shift.
- Ensure you can resell the unit if needed. As newer machines come out, older ones drop in value fast. Core Scientific+1
My top pick among those would be the Antminer S19k Pro 120T (Model #2) if you can verify it’s legit and you have cheap electricity. Its efficiency (~23 W/TH) is decent and the hash rate (120 TH/s) is strong. But if you’re just experimenting or want lower risk, the Avalon Nano 3S is interesting for home use though the profitability will be limited.
Key caveats & final warnings
- Amazon listings may include used or “renewed” units, imported power supplies, or hidden shipping costs; check listing details carefully.
- Electrical infrastructure: Many rigs require 220 V/240 V industrial circuits; your home might be wired for 120 V in the US—modifications may be required. CoinWarz+1
- Noise & heat: These machines make a lot of both. If you have housemates or neighbors, expect problems.
- Difficulty & coin price risk: Even if you set everything up correctly, shifts in mining difficulty or coin price can wipe out profits. WhatToMine+1
- Resale value: As new machines come out, older ones lose efficiency and resale value. So the “exit strategy” matters. Core Scientific+1
- Regulations and taxes: Mining may have local regulatory issues; plus income from mining is taxable. Be sure you’re compliant.
