<p>Yes, the hashrate adds up.</p>

<p>But GPU mining ended in 2013. The tiny bitdust you will earn will never reach a mining pool's minimum cash out limit. So you will never see any bitcoin. This will be a pure loss consisting of spent electricity and worn-out hardware.</p>

<p>You could buy a USB stick for mining, for 10 USD. It would mine at a loss due to electricity costs. Even if you have free electricity it would never earn back the 10 USD. So this would also be a loss.</p>

<p>The only way to mine now is with modern stand-alone miners. They have a much higher hashrate and efficiency and they use a tiny built-in computer instead of connecting to your PC. You'll want to get one that runs 1 TH/s (1000 GH/s) or faster. You will not want to pay more than 0.30 USD per GH/s for a miner with power supply. You will need cheap electricity.</p>

CC BY-SA 3.0
2016-01-27T08:47:51.650Z
2016-01-27T08:47:51.650Z
Dr.Haribo
<p>Yes, and that'll net you around 0.01 USD worth of BTC per year (as of January 2016), assuming your power is free.</p>

CC BY-SA 3.0
2016-01-26T22:03:28.417Z
Alternately, you can sell your keyboards, and that'll net you more money. You can still use a computer with just a mouse.
Nick ODell
CC BY-SA 3.0
2016-01-27T00:19:31.797Z
.01 seems generous for 20 Mhash/sec
Mark S.
CC BY-SA 3.0
2016-01-26T21:51:39.530Z
2016-01-26T21:51:39.530Z
Pieter Wuille
<p>Yes. More generally though:</p>

<p><em>x</em> mining machines with an average hashrate of <em>y</em> hashes per second will have the same chance of finding an arbitrarily low blockhash in a period of time as one mining machine with a hashrate of <em>xy</em> hashes per second in the same length of time.</p>

CC BY-SA 3.0
2016-01-26T22:53:20.487Z
2016-01-26T22:53:20.487Z
organofcorti
<p>Let's say I have four computers, each mining bitcoins at 5 Mhash/s. Is this the same as mining bitcoins on one computer with a speed of 20 Mhash/s?</p>

<hashpower><mining-theory>
Does mining with multiple computers add up?
Billy
# Does mining with multiple computers add up?

(Asked by: username_0 on 2016-01-26)

Let's say I have four computers, each mining bitcoins at 5 Mhash/s. Is this the same as mining bitcoins on one computer with a speed of 20 Mhash/s?

**Tags:** hashpower, mining-theory


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## 3 answers

### Answer by username_1 on 2016-01-27. Score: 2

Yes, the hashrate adds up.

But GPU mining ended in 2013. The tiny bitdust you will earn will never reach a mining pool's minimum cash out limit. So you will never see any bitcoin. This will be a pure loss consisting of spent electricity and worn-out hardware.

You could buy a USB stick for mining, for 10 USD. It would mine at a loss due to electricity costs. Even if you have free electricity it would never earn back the 10 USD. So this would also be a loss.

The only way to mine now is with modern stand-alone miners. They have a much higher hashrate and efficiency and they use a tiny built-in computer instead of connecting to your PC. You'll want to get one that runs 1 TH/s (1000 GH/s) or faster. You will not want to pay more than 0.30 USD per GH/s for a miner with power supply. You will need cheap electricity.


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### Answer by username_2 on 2016-01-26. Score: 2

Yes, and that'll net you around 0.01 USD worth of BTC per year (as of January 2016), assuming your power is free.

> **Comments:**
> **username_3**: Alternately, you can sell your keyboards, and that'll net you more money. You can still use a computer with just a mouse.  
> **username_4**: .01 seems generous for 20 Mhash/sec  

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### Answer by username_5 on 2016-01-26. Score: 1

Yes. More generally though:

*x* mining machines with an average hashrate of *y* hashes per second will have the same chance of finding an arbitrarily low blockhash in a period of time as one mining machine with a hashrate of *xy* hashes per second in the same length of time.


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