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Just make your own. Yes it technically violates code but certainly will not harm the miner.
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Most likely the miner is running in a different temperature environment. The PSU does not care about 50/60Hz though too low of a line voltage of could be an issue.
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L means it is a twist-lock plug. Only needed if there is a concern with a cord being accidentally pulled out.
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12 ga will work fine. It will get a little warm but be good.
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You mentioned that 8ga will be better than 10ga for the connection between the socket and the breaker, but that 10ga is ok for the plug between the socket and the miner. How come 10ga is ok here? Is it simply because the length of the cable here (3-6ft) is significantly shorter than the cable from the socket to the breaker (~40-50ft)? Bingo. Yes it is only because a cord is usually fairly short. I use www.stayonline.com for all my power cords. They have a huge selection of standard cords usually in-stock and will also make any type of cord you want. |
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You cannot 'build a rig' for mining Bitcoin.
Only ASIC-based miners are able to mine BTC and there is no way in hell a person can build them. They are only available from a very few companies (with very deep pockets to pay for the R&D + manufacturing involved) that specialize in them.
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As I just posted in a similar thread: Read https://bitcointalk.org/index.php?topic=2415854.0 mainly point-3 BTC can only be mined on ASIC-based hardware. And YES it does apply to servers! It would cost you thousands of dollars in electricity per year to earn only a few cents in bitcoin. Even if you combined all the computers in the world, including all known supercomputer, you would not even approach 0.1% of the bitcoin hashrate today. A variety of other coins can be mined on a PC/server but discussion of those belongs in the altcoin areas of the Forum. Services such as NiceHash can *pay* you in BTC but that is wholly different from mining it and again discussion about that belongs elsewhere. |
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Read https://bitcointalk.org/index.php?topic=2415854.0 mainly point-3 BTC can only be mined on ASIC-based hardware. A variety of other coins can be mined on a PC/server but discussion of those belongs in the altcoin areas of the Forum. Services such as NiceHash can *pay* you in BTC but that is wholly different from mining it and again discussion about that belongs elsewhere. |
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Aside from including Microbt (Whatsminers) and Innosilicon to that list, that is ALL the makers of decent miners that there are.
Yeah there is also the likes of StrongU and Ebang but their miners are pieces of crap with nothing good said about them and a lot that is bad said here in the Forum.
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The ideal is 24/7, but we have a lot of power outages where I run the miners, I don't think that creates any major issues, although some people claim that this will negatively affect the miners, I tend to believe that is far from accurate, assuming when the power comes back the voltage isn't super high/low enough to damage the PSUs. Aside from possible voltage spikes when power comes back on, the real potential damage comes from thermal cycling when the miners repeatedly cool off and then heat up again. If an outage is fairly short duration so the miner is still hot when power comes back on, then not too much concern there. Material expansion/contraction will stress the solder connections which can lead to cracking. In the case of the infamous S17's my concern would be the solder attaching heatsinks to the chips and/or the copper plating on the chips that the solder bonds to. |
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Mainly depends on how much fluid is in the system. Refer to https://sciencing.com/calculate-change-temperature-2696.html for calculating temperature rise. Per Clearco's data sheet http://www.clearcoproducts.com/pdf/heat-transfer-fluids/NP-PSF-50cSt%20Silicone%20Heat%20Transfer%20Fluid.pdf the fluid has a specific heat of 1.5 J/g °C and has a specific gravity (density) of 0.960 g/cc As for power put into the system, 1 J=1 Watt-second. Since a s9 typically pulls around 1,350W that gives a power input of 1,350 Joules per-second per miner. Oh, don't forget to add in the heat load that your pumps add to the system: Quick and dirty answer to that is it will be equal to the power used by the pump(s). You mentioned using 600 liters of fluid and of course 1 liter=1000cc. So to start you out: 600,000cc's * 0.96 = 576,000 grams of fluid Have fun with the math  |
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Boards and circuitry will be fine. That fluid has been used used in many makes of solid-state HV power supplies for decades and I've never seen any issues from using it.
20-25C will actually probably be too cold and the miners will not be happy until the chips get warmer. Again, you will want to look at reported chip temps - not the 'air' temp in and out. With immersion cooling the chips run much closer to fluid temp because heat transfer between the chips and fluid is much higher as opposed to air cooling where chip temps are much higher than the cooling air.
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There must be something wrong here with cgminer, right? Umm, or could be you found the reason that "Many older threads told me to only use Bitcoin Core 0.19.1"... Since -ck no longer updates cgminer and closed support for it, guess what?  |
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That should be a perfect choice and in fact is one that I've recommended in the several existing threads here that deal with immersion cooling. It has 2 primary advantages over mineral oil: 1) It does not attack plastics or epoxies - only warning is to NOT use any kind of silicone glue or sealant as it WILL attack them and turn them into a crumbly mass of rubber. 2) It is a fairly thin fluid meaning it pumps and flows very well. Don't know what temperatures you used to calculate the dry cooler capacity being able to handle 100kw but it may be able to handle more power. Of course it depends on what your highest outside air temp can be but on the miner side, something most folks forget to account for is that miners like a VERY warm chip temperature. As in around 70-degC or more. That translates into you being able to run with rather high oil temp, you probably find that a fluid temp of 50C will work perfect. If you've done the thermal calculations using a lower target oil temp -- good news! You can dump more power in. |
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And the reasons anyone would be interested in loading unknown firmware from an unknown source and running it would be...?
Telling us what it does that OEM firmware does not do would be a start...
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If you means media outlets like coindesk et al -- they are NOT 'credible'. They are pay-to-play sites with near zero oversight of what folks pay them to present as 'news'. When you come across crap like that miner the best thing you can do is post a complaint comment about it as well as send a post to whatever they have that they call editors.
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And yet another again asking the unanswerable... For some folks, yes it can be profitable. For most others it never has been and never will be. 1st, read the post pinned to the top of this section, mainly point-3 That out of the way, profitability all depends on what your power costs. BTC miners are very power hungry, very hot, and very loud. Not mention, currently very expensive. Some folks with cheap power and a place to run the hot loud machines are in great shape to mine. Most other folks -- not so good. Only YOU can make that call. Do your research on what mining involves, what miners cost, the amount of power they use and YOUR cost for power then do the math. |
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I am in the United States and I have a standard 15 amp outlet
Then that is your problem. Normal power in the US is 115-120VAC and as has been repeatedly said the miner requires 208-240v. Find an unused dryer or stove outlet (which are all 220-230V in the US), get the correct cord and I bet it works.... Not being snarky but -- if you do not even know that normal power in the US is 120VAC then things do not bode well for you with this venture... |
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