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Cryptocurrency Mining Insights: Guides, Hardware and Running Costs

Two pieces here are worth reading before the rest: the ASIC miner buying guide, which works out the electricity price above which a given machine cannot pay for itself, and the S21 Pro versus SealMiner A2 Pro Air head-to-head, which is a worked example of the same arithmetic on two machines we actually stock. Everything else below hangs off those two. If you would rather look at hardware than read, the used ASIC miners and new ASIC miners categories are the two ends of the catalogue.

The two machines compared: on the left, Canaan's product image of the Avalon Q, an upright grey tower with a honeycomb intake grille and the Canaan hex logo; on the right, our photograph of a refurbished Bitmain Antminer S19 XP on the bench, its large front fan and finger guard facing the camera with the control board and power supply behind.

Avalon Q vs Antminer S19 XP: What Quiet Actually Costs

The Canaan Avalon Q is the more efficient machine and the wrong buy for almost everybody: $22.21 a terahash against…

Our own photograph of six used Antminer S19k Pro miners racked in a row with flexible exhaust ducting fitted to each and their power supplies mounted alongside, the arrangement a multi-machine used fleet actually takes up.

Antminer S21 Pro vs S19k Pro: One New Machine, or Nine Used Ones?

One new Antminer S21 Pro 245T costs the same as nine used S19k Pros once freight is counted. We ran…

Our own photographs of the two machines compared: on the left a rack of Antminer S19k Pro units with ducting and power supplies fitted, on the right a single refurbished Antminer S19 XP on the bench with its fan and control board visible.

Antminer S19k Pro vs S19 XP: The $320 Only Some Sites Get Back

Two used Antminers on the same shelf, $320 apart. The XP is 7% more efficient and 23% denser, and for…

Left, a steel rack of Antminer S19-series ASIC miners installed and cabled; right, ten Bitmain Antminer S21+ machines standing on a warehouse floor.

Used vs New ASIC Miners: What Fails, What Repairs Cost, and When Used Wins

Used wins only where power is cheap enough that a 34 J/TH machine still clears its bill. The two gates…

Side by side photographs of the two machines compared: a refurbished Antminer S19 on a workshop floor with its power cables coiled beside it, and a rack of Antminer S19k Pro units with ducting and power supplies fitted.

Antminer S19 vs S19k Pro: The Cheaper Used Miner Costs More to Own

A boosted Antminer S19 is $130 cheaper than an S19k Pro and burns about 816 kWh a month more to…

A NerdQAxe++ desk miner and a used Bitmain Antminer S19 from ING Mining's own stock, shown at their real relative size. On the left the NerdQAxe++: an open green circuit board with a small colour status screen, an RGB-lit fan on a finned heatsink and a black 12-volt power brick beside it. On the right, filling most of the frame, the front face of the Antminer S19 - two large dust-marked fans behind wire guards, its scuffed grey chassis, and three power-supply fan grilles with the twin mains inlets below them.

NerdQAxe++ vs Antminer S19: A Desk Miner Against 3.25 Kilowatts

The desk miner is the efficient one, at 16.2 J/TH against 34.2. Break-even rates, the 3.75-cent crossover, the real solo…

The two altcoin ASIC miners ING Mining stocks, side by side and at the same scale because both boxes are the same height: on the left a used Bitmain Antminer KS5 Pro, a grey steel Kaspa miner with two large black intake fans on its end face and a three-fan power supply bolted along its side; on the right a Bitmain Antminer L9 17G Scrypt miner for Litecoin and Dogecoin, a bare grey chassis photographed on an orange workshop mat with its manufacturer label and yellow high-voltage warning stickers visible on the side panel.

Kaspa Miner vs Litecoin Miner: Antminer KS5 Pro vs L9 17G

Kaspa miner vs Litecoin miner: the Antminer L9 17G breaks even at 9.15 c/kWh, the KS5 Pro at 5.32 c.…

A refurbished Bitmain Antminer S19 XP 141 TH/s air-cooled SHA-256 Bitcoin miner photographed in our own inventory, showing the front fan stack and the power supply mounted on top of the chassis. This is the used machine compared against a new Antminer S21 Pro 245T in this article.

Antminer S19 XP vs S21 Pro: Which One Actually Pays You Back?

The used S19 XP returns capital faster below 5.5 c/kWh; above it the new S21 Pro wins. Break-even, payback and…

A Bitmain Antminer L9 Scrypt miner standing on an orange workshop mat, its ventilated steel case and end plate facing the camera.

Antminer L9 16G vs 17G: Same Machine, Different Bin

Both L9 bins run at 210 J/GH, so efficiency cannot decide between them. What can: your breaker, cost per gigahash,…

An Antminer S19 Pro hashboard on the left and a Bitmain APW17 power supply on the right, photographed separately and shown side by side.

Antminer Parts Compatibility: Order the Right Hashboard, PSU or Fan

Read the BHB code on the board, not the badge on the lid. What actually fits an S19, S19 XP,…

A Canaan Avalon Q 90T home Bitcoin miner and a used Bitmain Antminer S19k Pro 120TH Bitcoin miner.

Avalon Q vs Antminer S19k Pro: Which One Belongs in Your House?

90 TH/s at 18.6 J/TH and 45 dB against 120 TH/s at 23 J/TH and 75 dB. Verified specs, the…

Pallets of used Antminer S19s shrink-wrapped for freight, outdoors.

How to Buy a Used ASIC Miner Without Getting Burned (2026)

How to buy a used ASIC miner: what the condition grades really mean, how to work out landed cost per…

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