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Yes, It's the problem, CPUs are good at float computing, not doing SHA-256……
Is there any way to sell cpu float processing power?

I have a lot of idle processing power, some of them even with free electric supply, but they all have poor network access (may of them even have no network access)  so I cant rent them out as a VPS or something like webserver ……

I found bitcoin mining maybe a good way to make use of them, but I am not sure whether it's the best way.
Is there anyother way I can sell/rent the processing power?

BTW:
Most of them are server boxes, they have powerful CPU and pool GPU (I am not sure it could call GPU or not just a onboard video chip)
They are good at float computing not SHA-256......

Thanks,
CreateFile

only the proxy server need internet access?

I also have some auto vendor machines ( which have a desktop computer inside, I can install a video card for them )
electrics are for free ( I paid the rent monthly, electrics bills are cover by landlord, they measure how much my machine uses )

And Is that possible to setup the miner stop occupying CPU/memory in 1 second after keyboard is touched?

Hello

I have a big server room, for security reason, I won't let any machine have access to internet, I want to let them mine bitcoin when they are idle.

So I want to build a private pool without network access
( I want use USB disk to copy blocks list from other computer which have access to internet to the server machine of the private pool every day, and ofcourse copy result blocks out and publish it to bitcoin network)

Is that possible?

What risk do I have ?

Thanks,
CreateFlie