So I don't have a degree in MS Excel, but I cannot agree with this prediction. Before I spent money on new miners I picked up a used S7 off Ebay, this was pre-psychotic pricing ($630.00+ $37.00 shipping). Before doing so I looked at the predicted earnings and compared that to the price of the miner. I set my target buy price to ROI at roughly the same time a new S9 would. It took me a bit, but I found a solid seller. So yes, if you spend too much on **ANY** miner (or business equipment for that matter) it will not be profitable. But if your spreadsheet and theory were accurate and as predictable as you make it seem that old ass miner should not be making anything! Yet is is happily hashing and has almost paid for itself.  |
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Its a March 20 batch, so same as yesterdays (March11-20 was yesterdays batch). Looks like bitmain wanted to take advantage of the free btc during the dip. I am happy, now have 20 s9s coming through all of march to start phase 1 of my new mining location.
I said late March 'cause they have listed March 21-31. Looks like are staggering them a bit. |
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Telegram just went off, looks like there's a late March batch up for sale.
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Legit - i tried it... 20% on L3+
Stock 384M @ 500 mh/s
Overclocked 462M @ 600 mh/s
earnings reflect that too....
and well to the person asking what if i increase output by 20% and decrease life by 50%... i would say they become almost useless with difficulty change in the latter 50% of their life at which point there is more efficient and powerful machinery.... please tell me if i am wrong - i AM still new to this... and did that guy ever overclock his machine?
If you brick it you lose all the resale value. Go check out what S7s are going for on Ebay. I made those % numbers up, just as a way to illustrate that overclocking, to me, appears to be a short term goal because you sacrifice the life of the equipment and most likely completely void the warranty. I am sure Bitmain can tell an overclocked burned up miner easily. Funny thing is nonfunctional hardware still fetching an impressive amount. Solid point, people are selling miners for parts and asking/getting dumb prices! |
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Legit - i tried it... 20% on L3+
Stock 384M @ 500 mh/s
Overclocked 462M @ 600 mh/s
earnings reflect that too....
and well to the person asking what if i increase output by 20% and decrease life by 50%... i would say they become almost useless with difficulty change in the latter 50% of their life at which point there is more efficient and powerful machinery.... please tell me if i am wrong - i AM still new to this... and did that guy ever overclock his machine?
If you brick it you lose a lot of miner's resale value. Go check out what S7s are going for on Ebay. I made those % numbers up, just as a way to illustrate that overclocking, to me, appears to be a short term goal because you sacrifice the life of the equipment and most likely completely void the warranty. I am sure Bitmain can tell an overclocked burned up miner easily. On edit: Because, as pointed out, in today's market even a busted miner can sell. Just not as much  |
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Let's say you miraculously find a way to overclock it by 20%, but reduce the life by 50% (not to mention wrecking stability). What have you accomplished?
Our collective knowledge to 20% might be a little too much, Why discount the value of knowledge. Either that sarcasm was completely over my head (which is most likely the case) or I should have included a disclaimer that I was making numbers up |
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Let's say you miraculously find a way to overclock it by 20%, but reduce the life by 50% (not to mention wrecking stability). What have you accomplished?
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Something's not right.  Is that on Halong? Hah, are they using an old BTC price? That's on myrig, now when I click on my order I get Russian or something. Getting a similar price here as well; 0.62900328 BTC It's like they have the MOQ set to 5 for checkout, but are showing individual pricing in the main page. |
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Something's not right. Is that on Halong? Hah, are they using an old BTC price? That's on myrig, now when I click on my order I get Russian or something. |
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Something's not right. |
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All the bots must be beating down the site...
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I think you need to figure out how much rent you can afford per kw.
Then figure out how much fan you need per kw too.
Mining at scale is tough. it's a lot of capital in, and you are competing with garage miners with no overhead.
If you are signing a long term lease, look at whether you could survive another tough period like 2014-2015. The odds are good that it is coming.
Good luck.
Thank you very much for your input! I will sit down and work that out. Also point taken on what the future looks like. |
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from the sketch you show, i am guessing this is a commercial condo structure with setup for office in front and warehouse in the back.
They only have 220V 200A service typically. And it's not as simple as upgrading the panel. You need new wires from the transformer, if the transformer has capacity (it probably doesn't).
You will be hard pressed to support the cooling requirements in a space like that. Even if you have a climate that allows for only air cooling year round, 200 kw calls for around 30 000 CFM of air in an ideal situation (100% efficiency and separation between hot and cold)
Even running 20 kw in that kind of space would be challenging.
It is a simple metal building, or I should say a row of buildings. Each unit is 20x50 and they are back to back. The little office was just me drawing one in  |
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How many kW are you planning to draw? It can be anything from easy to impossible depending on your answer.
Keep in mind that commercial leases require you to restore the building to original condition if the landlord wants. Cutting holes can get pricey. And leasehold improvement laws mean that any electrical work you do stays with the building.
For any scale that I find interesting these days this means buying the building. Most upgrades to make a building suitable for serious mining will cost more than the property itself.
I was going to use an 800-1200A panel. I am meeting with the owner tomorrow to get all the lease details. I do not mind paying for a panel upgrade and I do understand that I will need to reverse any changes that I make. That's why I was looking at just modifying the roll-up door. You're right it does take a lot of modifications for airflow and cooling and makes buying more attractive. I am just not sure I'm ready for the initial outlay, I hope to find a sympathetic landlord. |
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Yea heat in general rises but you will be dumping out much more heat than that natural rise can account for. On days with no wind you will still heat soak the general area. Ducting it to dump elsewhere is an idea but the landlord might not want a steampunk looking warehouse.
Yeah, definitely no Mad Max stuff I am going to talk more with the building owner. Maybe I can swing two very high CFM roof exhaust fans. |
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One thought. Maybe you could use large ducting like 24" and elbow up from the door to near the roof to get the heat up and away.
Interesting idea! I'd have to build it in a way as to not catch rain water and debris. |
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If you are exhausting on the same side as your intake you will just be drawing hot air back into the facility and defeating the purpose of the fresh air intake. I have tried a setup like this before and it did not work so well. Cant you add fans and hoods on the roof to exhaust the heat?
Makes sense, I was hoping the hot air would move up and not affect the intake air temp. I will have to check out the fine detail on the lease about what I can do on and to the roof. The door idea was just for ease of modification, something I knew I could put back in place if I left. Thank you for your input, I might just keep looking even if I have to pay a higher rate for a better laid out building. |
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I've been looking at renting some really inexpensive warehouse space close to my home to use for mining. But one potential problem I see with the space's dimensions is that there is only one side to both pull in fresh air and exhaust the waste heat. Below is a basic drawing of how I'd like to isolate the cold side and hot sides and also replace the roll-up door with a wall containing intake and exhaust vents. I'll need to double check, but I believe the door is ~ 10'wide and 14' tall. Note: Nothing is really to scale in the drawing yet. My main question is if I am exhausting hot air near the top of the door can I also intake air near the bottom. Intuitively I feel yes, but I'd like smarter folks to have a look.  SORRY, meant to post under support! I tried to delete  |
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Guys, you pay for a product listed in USD.
Its clear that the nominal BTC value changes - most of these Crypto payment providers even transform the Cryptos directly into the dollar amount at the time of payment.
That's why I asked if they provided a reason for the subtraction. If the USD amount was the same before and after then yes, what you say makes sense. **But** doesn't that go against what we're trying to do here? Use Bitcoin, or any other coin for that matter, as a currency? Playing games around exchange rates is just wrong. |
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I thought myrig was going to sell single units? I think the MOQ of 5 is when ordering directly? Or did I read it wrong?
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