<p>The comparison doesn't make sense. You can't use Bitcoin ASICs to do general computation, and using CPUs to mine Bitcoin is incredibly inefficient.</p>

<p>It also isn't meaningful in terms of security: no one would try to attack Bitcoin by taking over all of the CPUs in the world. Instead, they would fabricate or buy mining ASICs. (Or, more likely, try to hack into the pool servers that miners get their work from.)</p>

CC BY-SA 3.0
2015-05-13T05:28:03.410Z
2015-05-13T05:28:03.410Z
Nick ODell
<p>In the London Bitcoin Bank project I remember our average speeds from a pool of 400 people participating at various times was about 40 MHs on average (visual observation). LBTC teams all had GPU's, though some tried to join with CPU's.</p>

<p>This article from Forbes speaks about bitcoin miners in their totality being more powerful than the most powerful super computers combined:
<a href="http://www.forbes.com/sites/reuvencohen/2013/11/28/global-bitcoin-computing-power-now-256-times-faster-than-top-500-supercomputers-combined/" rel="nofollow">http://www.forbes.com/sites/reuvencohen/2013/11/28/global-bitcoin-computing-power-now-256-times-faster-than-top-500-supercomputers-combined/</a></p>

<p>To your answer practically no. No one computer on its own is going to do anything to bitcoin any time soon. But many computers could, but its not even worth it. Breaking the mechanics of bitcoin is more likely to cause a problem than trying to brute force with computing power.</p>

<p>When one ASIC is equal to thousands of GPU's, forget even CPU's! You are better off trying to break steel with a tooth pick!</p>

CC BY-SA 3.0
2015-05-12T05:12:44.430Z
2015-05-12T05:12:44.430Z
Thoth
<p>I would estimate there are roughly 2 billion computers in the world, with an average hashrate of 10 MegaHash. That equals to 20,000 TerraHash or about 20 PetaHash. The Bitcoin network is around 20 PetaHash now. Does this mean that the network cannot be attacked using regular computers anymore?</p>

CC BY-SA 3.0
2014-01-28T23:31:39.060Z
What exactly do you mean by "cannot be attacked"? You can attack it with a regular computer no matter the difficulty, although it may make no sense to do so. Also, the answer to the title is a definite "no", considering it's a subset of computer power (it's the "*regular* computers" part that makes your question possibly valid).
Tim S.
CC BY-SA 3.0
2014-01-28T23:34:37.710Z
Changed the title.
Tarandeep Gill
CC BY-SA 3.0
2014-01-29T06:46:58.950Z
This is a really tricky question with no correct answer. You can say that the Bitcoin network has the largest SHA hash rate. If "Regular computers" meant the most common computer everyone has (mobile phones) , Bitcoin would be safe since a few years ago.
John T
<mining-hardware><mining-theory><hashpower>
Has the Bitcoin network surpassed the total computing capacity of all the general purpose computers in the world?
Tarandeep Gill
# Has the Bitcoin network surpassed the total computing capacity of all the general purpose computers in the world?

(Asked by: username_0 on 2014-01-28)

I would estimate there are roughly 2 billion computers in the world, with an average hashrate of 10 MegaHash. That equals to 20,000 TerraHash or about 20 PetaHash. The Bitcoin network is around 20 PetaHash now. Does this mean that the network cannot be attacked using regular computers anymore?

**Tags:** mining-hardware, mining-theory, hashpower

> **Comments:**
> **username_1**: What exactly do you mean by "cannot be attacked"? You can attack it with a regular computer no matter the difficulty, although it may make no sense to do so. Also, the answer to the title is a definite "no", considering it's a subset of computer power (it's the "*regular* computers" part that makes your question possibly valid).  
> **username_0**: Changed the title.  
> **username_2**: This is a really tricky question with no correct answer. You can say that the Bitcoin network has the largest SHA hash rate. If "Regular computers" meant the most common computer everyone has (mobile phones) , Bitcoin would be safe since a few years ago.  

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## 2 answers

### Answer by username_3 on 2015-05-13. Score: 2

The comparison doesn't make sense. You can't use Bitcoin ASICs to do general computation, and using CPUs to mine Bitcoin is incredibly inefficient.

It also isn't meaningful in terms of security: no one would try to attack Bitcoin by taking over all of the CPUs in the world. Instead, they would fabricate or buy mining ASICs. (Or, more likely, try to hack into the pool servers that miners get their work from.)


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### Answer by username_4 on 2015-05-12. Score: 0

In the London Bitcoin Bank project I remember our average speeds from a pool of 400 people participating at various times was about 40 MHs on average (visual observation). LBTC teams all had GPU's, though some tried to join with CPU's.

This article from Forbes speaks about bitcoin miners in their totality being more powerful than the most powerful super computers combined:
<http://www.forbes.com/sites/reuvencohen/2013/11/28/global-bitcoin-computing-power-now-256-times-faster-than-top-500-supercomputers-combined/>

To your answer practically no. No one computer on its own is going to do anything to bitcoin any time soon. But many computers could, but its not even worth it. Breaking the mechanics of bitcoin is more likely to cause a problem than trying to brute force with computing power.

When one ASIC is equal to thousands of GPU's, forget even CPU's! You are better off trying to break steel with a tooth pick!


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