Spondoolies SP20 Review

  • 1.7 TH/s max hashrate tops its nearest rival, the AntMiner S5
  • Costs just $110, can be purchased on eBay or Amazon
  • Quiet at low speeds, generating ~52 dB from 1 meter
  • Spondoolies co. has closed, meaning limited availability & support
  • The unit runs quite hot, especially at higher speed
  • At 0.9W/GH, its efficiency is poor compared to the S5’s 0.25W/GH

Buy SP20 Jackson

The Spondoolies SP20: Better Value than the AntMiner S5?

Spondoolies unfortunately shut down on May 4th 2016. In late 2014, they released the SP20.

Spondoolies crammed a total of eight 28nm RockerBox ASIC mining chips onto 2 circuit boards within a compact form factor.

The SP20 is a neat miner, powerful for its low price with a size and noise level suitable for home miners.

The major drawback is its relative inefficiency. The SP20 draws a lot of power for its hashrate, which is low by modern standards.

Power Supply

Any ATX PSU of sufficient wattage (1200W+) will run the SP20 without problems.

In keeping with the SP20’s flexible design, you may also use dual lower wattage (750W+) PSUs to replace a single powerful PSU.

SP-20 Compared to Other Hardware

PicMinerHash PowerPriceBuy
antminer-s5.mdAntminer S51.16 TH/s$139.99Buy
antminer-s7.mdAntminer S74.73 TH/s$489.99Buy
antminer-s9.mdAntminer S914.0 TH/s$3,000Buy
avalon6.mdAvalon 63.50 TH/s$559.95Buy
sp20.mdSP20 Jackson1.3-1.7 TH/s$90.00Buy
antminer-r4.mdAntminer R48.6 TH/s$1,000Buy

Bitcoins / Month (Profitability)

Unless you have free electricity, it’s highly unlikely the SP20 will ever pay for itself, never mind make a profit.

If we enter the SP20’s stats and some average costs into our mining profitability calculator:

the results are fairly poor:

Far less than a single BTC will be mined in a year, making the SP20 a waste of electricity.


The SP20 costs in the region of $110 from eBay.


The SP20 has a solid, rectangular metal housing which is easy to stack or store.


The SP20’s 120mm fan is quieter than the models in either the SP10 or SP30 models. Although it get noisier the faster and hotter the SP20 runs, it’s quiet enough to run in a home.


Spondoolies’ user interface provides all the configuration settings and monitoring information you’re likely to need.

The SP20 simplicity itself to setup. The GUI displays temperatures and hashrate for each individual chip, plus other vital info.

You can even use it to adjust voltages (within reason) on the board, to find that sweet spot between hashrate, power and heat.

The SP20 connects via Ethernet only.


This unit should be operated in environments below 35^C / 95^F. Due to its high power consumption, it generates a lot of heat.

At high processing speeds, the heat will cause the fan to become much louder.


The Spondoolies SP20 was a great mining device in its day. With the Bitcoin network’s current Difficulty, it no longer makes economic sense to run an SP20 given its low efficiency.

The AntMiner S5 is far more power-efficient and costs around the same.While more expensive, the Antminer S7 and Antminer S9 (or even the R4) both offer much more efficiency.

Unless there’s some specific hardware mod you’d like to perform with the SP20, it’s not a great purchase except as a piece of mining memorabilia (like USB miners).

Buy SP20 Jackson

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SP20 Jackson
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  1. Hello! Great BTC mining resource indeed.

    Regarding the Profitability Calculator, shouldnt the Hash Rate of the SP20 be 1700 GH/s which is equal to 1.7 TH/sec? Thanks, B

  2. If power cost was not an issue (free electricity) , what mining rig will offer the quickest ROI? What do you think of the X11 miner 450M PinIdea Dr2? Thanks

    1. If electricity is free then you will want to go with the most efficient miner that you can afford.

  3. Is there a way to change the programming in the unit to mine something else? I am new at this, and I hate to ask a silly question, but… Would rather put it to work than throw it out in my garage for the mice to play with.

    1. If you are talking about the SP20 then no, it can only be used to mine bitcoins or another SHA256 coin.

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