Run linux. Problem solved.

Normally I would ask if there is a reason why you wouldnt just plug them in anyway?

But in this case, those are the scariest looking risers I have ever seen. I wouldnt even use those. It looks like an unpowered riser with extra power plug lazily soldered onto the side. That and they are double the price of a powered riser.

You cant use computers to mine bitcoin, you need specialized hardware. This site is a gold mine of information. My tip would be to study more on the site, nobody likes answering the same questions over and over and over when you can just read about them for yourself.

So much ignorance on these forums. 750 workers isnt even 1 megawatt of power, that farm can be anywhere. Please stop spreading falsehoods. Its time people stop saying "China" for everything crypto that is at any sort of scale.

Also places like Texas have a ridiculous amount of wind power. There are lots of options, but for whatever reason people on this site cling to some strange notion that you can only get cheap power in China. Every time I mention that you can get cheap power in North America some fool has to come out and try to argue the fact.

If you expect the system to draw 1500 watts a 1500w PSU is not nearly enough.....you will want at least 1800w. Pushing a PSU to its max rating will both lower the efficiency by a bunch, burn the PSU out more quickly, and most likely cause a bunch of crashes/hangs as the PSU will not be able to regulate its voltage properly at 100% usage. Thats on top of the instability you are building into the system by running too many cards on one board.

That looks like the Asus Prime H270 Plus...I see no supplementary power for all those PCI-E slots. Is that not a concern for your build running 8 cards?

This is a bitcoin only section of the site. Please post this in the alt coin section if you require assistance.

They are not obsolete. With $0.03/kwh power they make $115/month after costs. You cant use residential power costs then declare something obsolete when it is far from the truth. On the open market they should be worth around $275 each and still have a 3 month ROI with the proper power costs.

It is safe to use both of them. It is setup that way so you can use both of them off a single cable run and not have extra wires everywhere.

Open a command prompt and run your .bat file manually so it doesnt auto close the window on failure. Then you can see the error.

First things first - this belongs in the alt coin section, this is not bitcoin mining hardware related at all.



You must be buying on archaic power supply if it is going to have 10 molex plugs, you do not want to use molex as they only have a single 12v wire. Any PSU capable of powering that many cards should have a fair number of PCI-E connectors already. You can then just buy splitters. Just remember to not daisy chain the splitters into each other.

E.G. - https://www.amazon.com/JacobsParts-Express-Power-Splitter-Cable/dp/B00JLU0UQ4/

There is no next asic generation coming for a long time....

The chances of finding a block are infinitesimal on a single miner. Dont waste your time trying to solo mine.

FYI if you buy any new S/T9s they are autotune. There is no overclocking.

Depending on the batch they use more than that. I have some older S9s here running nearly 1500w at the wall socket.

Also there is no S9 that only pulls 1125....you are forgetting to add another 10% to those figures.

From bitmains site:

 Power Consumption 1127W (11.5TH/s batch), 1225W (12.5TH/s batch), 1274W (13TH/s batch), 1323W (13.5TH/s batch), 1372W (14TH/s batch) (at the wall, with Bitmain’s APW3 PSU,93% efficiency, 25°C ambient temp). Expected discrepancy of +10%

so thats a minimum of ~1239 for the slowest up to ~1509 for the fastest

just buy a $2 splitter and run it off of one of the other PCIE connectors

You need to plug in both. They didnt waste a bunch of manufacturing costs adding a second plug just for looks.

Run linux. Try ethOS or SimpleMiningOS.

Running Windows 8 is your problem.

This kind of cooling is cost prohibitive and unnecessary for what you are doing. If it is a dusty environment just blow them out with a compressor every couple months or so. You wont find a profitable large scale mine out there that gives two shits about dust and spends a ton of money on air filtration. At best they use swamp pads and consider those their filtration system.

20 T9s is only 32kva. Any commercial building can handle that no problem. The biggest problem you will face is actually making a profit. 10 cent power is pushing the limits of viability.

You will also have to purchase a small amount of electrical infrastructure, network gear, power supplies, and find a way to cool it all. You also need to find a warehouse that is not a concrete bunker as it will just absorb the heat and make it even harder to cool. Also most commercial establishments are not going to enjoy the sound of a small airplane buzzing around their property 24/7/365 either so you will have to factor noise into the location you pick.

Making $2200/month means it will take close to a year to recoup the initial investment. In another year the difficulty and network hashrate will be so much higher the chances are you wont be making close to $2200/month at the end of the first 12 month period it will be more like $1500. Im not saying you wont eventually make a small profit but dont expect to make a bunch of money on this investment. To make real money mining bitcoin you have to go large in a dedicated facility with ridiculously cheap power. At that point you are looking at millions of dollars to make it through year 1.


P.S. You will be using like 35-40kilowatts, not even scratching the surface of the megawatts. 1 megawatt of power is like 650+ T9s on its own.