And one more:  |
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Well, here we are All three units would not power on, I had to remove the case and plug the controller card back in. Also, 2 had the ribbon cable to the LCD unplugged and one had the ethernet unplugged. The one on top is missing screws, including screws for the bracket. It also has a nice dent on the bottom corner under the middle fan you can see. That was not caused from shipping, and was not caused by me. Once everything was plugged back in (and the asic cards reseated as well) All is working fine. The middle one shut itself off after 5 min of running without the cover on, I'm assuming it was due to over heating. But we'll find out soon enough!  |
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It's official, I'm no longer a KNC customer in waiting. My final refund arrived today. Well, the good thing about it all is I basically just got paid $30,000 for the 31BTC I sold back then.
So, recommendations. Antminer S2 or Spoondoodilies?
Mining at home or Colo? Well, actually, unless density is hugely important I'd go with the S2, but only after seeing some end-user reviews. I like the Spoondidler, but it's loud, pricing is prohibitive, and there's a pretty sizeable delay between order and receive. It's a really nice looking piece of HW though. I rent DC space $50/mo per 45U rack plus power, so 30 spoondoodilies in 1 rack is only $100/mo cheaper than 3 racks of 10 S2's |
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Can you give a source for the wire junctions (if that's what they are called) your using on your PSU mod please? I have been looking for awhile and cant find something similar Are you looking for the gold power brick or the connector to the PSU itself? The connector to the PSU was custom made by Sunbreak, I can sell those for $45, the gold power bricks are $10 (plus flat rate shipping $5) I then use some nice tinned 16awg from the power bricks to the miners, I use 2 pair, and that's just fine @16awg. For 18awg I'd recommend all 3 pair be used (Or 18awg for the pcie power connector) The power brick actually lines up perfectly to the fan holes and mounts extremely sturdy to the chassis on "the cube"  Power Supplies with Adapters:  |
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Can you give a source for the wire junctions (if that's what they are called) your using on your PSU mod please? I have been looking for awhile and cant find something similar the wire is just automotive 12 volt wire/ connecters what i want to know is where he got them PSUs It's welding cable, nice and flexible and can handle high temps. Power supplies are DPS-2000BB |
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It's official, I'm no longer a KNC customer in waiting. My final refund arrived today. Well, the good thing about it all is I basically just got paid $30,000 for the 31BTC I sold back then.
So, recommendations. Antminer S2 or Spoondoodilies?
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Out of shelves, had to make do.
looks like they're just stacking on top of each other..... how are you securing them? Judging by the photo, looks like white zip-ties holding them together as well as supporting the whole stack from falling over by zip-tieing them to the post... oh... yah i saw the zip tie now. Now i want to know what datacenter let you set up such rig? When you have your own space, you can pretty much do whatever custom installation you please :-D |
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Out of shelves, had to make do.
looks like they're just stacking on top of each other..... how are you securing them? Judging by the photo, looks like white zip-ties holding them together as well as supporting the whole stack from falling over by zip-tieing them to the post... Correct, zip ties. Lots, and lots, of zip ties. Then I have (near the top) a tie on each corner to the rail mounts. The antminers have lots of small holes along the edges, perfect for tiny zip ties. It's by no means secure, but I'd rather be mining until the shelves arrive in a week! |
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Ran out of shelves, had to make do.
I'm sure someone has asked, but what do you use to power the ants? Have you a quick howto/faq describing the parts for the server PSU and cabling? I'm currently using consumer Corsair 600W per overclocked ant and I'd like something cleaner. I can run dedicated 20A 120v circuits, so hopefully something that works with this. Thanks in advance he uses Delta DPS-2000BB server PSUs. (2000W) 200v-240v only In this picture I only have each Delta powering 4 overclocked Ants, but my normal set-up is 6 overclocked ants per PSU. (OC to 375) |
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Ran out of shelves, had to make do.  |
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Out of shelves, had to make do. |
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Ouch guys, I was finally ready to pull the trigger on the SP10 pair, but I can't justify the $800 shipping cost. It would have been better if you'd priced the set at $8499 with $300 shipping. Too big a sticker shock for me, I ended up just letting the order expire.
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If you're only powering a single s1 you won't have the fan kick on, so you 're good to go
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I've also bought from them, quick service and quick shipping
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Temps seems quite low, any added cooling? What's the ambient?
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One of the benefits of these boards is, if your $110 supply goes out you're out the supply and all the wiring. If the $12 supply goes out you get another $12 supply and don't touch the cabling at all. Plus you can actually get 750W out of them, sustained, which destroys most 750W consumer-grade supplies inside a few weeks, if not days. If you want to have a backup $110 supply to swap out quickly, it costs you $220 up front. If you want a backup for these, it costs an additional $12 up-front and the swap is unsocket-resocket instead of pull-and-rerun-all-cabling.
THIS, this is exactly why I choose server PSUs. |
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Yes I had previously done that calculation as well. The only thing I can think of is if you are (or maybe your employer is) already paying for a rack that is underutilized power-wise but has a little space left you can add a few of the miners. I couldn't give a rats ass about nanometers or "sexy" miners (seriously you guys need to get out more). All I care about is price, delivery, reliability, hash rate, and power usage.
Obviously, I don't have to agree with you 100% (except for the part that I should get out more).. but you're right on the money with that fact that the ASIC doesn't need to look "pretty". To get the job done is the right attitude and it's not like we'd look like poster boys ourselves either. Furthermore, it left me thinking about the 1.25U competitor.. If they consume between 1.2 - 1.35kW power, why bother with such a small factor (and risk with not being able to dissipate the heat effectively, hence more noise for fans spinning at max)? Yes, it is the coolest looking kid on the blockchain, but as most Data Centers can normally only facilitate up to between 8 to 12 kW of power per rack (including the equivalent in cooling), where lies the benefit in 1.25U when you can only fit 10 of those into a 42U rack maximum, leaving 70% of the rack unpopulated from a density point of view? Data Centers that could facilitate more power are few and far between. In this sense, BITMAIN seems to be spot on with the sizing - but it does come down to the price and how well they can position themselves on the market. No doubt more competition is coming and the big names of the past are looking to regain their position. What sort of servers are used that have higher densities of power than the usual rack? (fitting with the scenario you suggested above). there are examples of server racks that are 3 antminers/4U = >30 antminers or 12kW. I assume with enough airflow the high power demand can be handled. Most racks though are not often equipped with more than 1 or 2 6" PDU units, generally capable of 4-6kW each depending on the outlet style. However, adding another PDU or simply employing multiple shorter but equally powerful PDUs would at least deliver power to the rack. Its also quite possible not many datacenters expect such power density, and may not have enough available outlets per rack even if airflow/cooling are not a limitation The 2 DC that I'm in are completely modular, I can order multiple 60A 3-phase connections if I wanted, so power density isn't an issue. I currently have 2 30A 208v single phase per rack, which is enought for 27 S1's overclocked, and the plan will be for 10 S2's. Depending on the DC and their rules, you may be able to go above the 80%, at mine, the only thing I lose is the uptime guarantee if I trip my own breaker. 2 of these gives you a 10KW rack http://www.newegg.com/Product/Product.aspx?Item=N82E16812120346That PDU doesn't take up very much space. If density required it, 4, 6 or even 8 is completely feasible, however if you're running a 40KW rack, you'll probably want to think about 3-phase. May I ask how much a 30A 208V line costs per month in your DC? $585/mo |
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