I just got one of those last week. I have it cooling a room with a FrankenJup and an S1. The room now stays at a chilly 85f, lol. But at least the home A/C can now switch off once in awhile. It was running 24/7 otherwise. I am not sure about the thermodynamics of it. Where does the heat exhaust go? In other words, does it have windows exhaust? Heat has to be transferred somewhere. There's a 4" exhaust hose that's left out of most pictures. |
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That (your pabst fan) is a poor choice for this application: too little cfm and axial fans are not suited to moving air through ducts etc. |
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I have one, it's a great unit. Puts out a ton of cold air. There's an addon module which allows for network connectivity (e.g. shell, SNMP) and a separate temp sensor which looks interesting - at least at the right price. |
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Hello!
I have a problem with cooling down my Antminers. I currently have two of them and they produce a crapload of heat which I don't need. What I need help with is cooling the antminers so they wouldn't produce so much heat and noise when the fan goes crazy on cooling them. How should I try to cool them?
I think you need to understand the physics of this, heat is a factor of energy, the miners chips use X amount of energy and produce Y amount of heat. They will always produce the same amount of heat from the energy consumed. You can do two things. 1. Lower the ambient heat levels This can be done by moving to a cooler climate or installing airconditioning or managing the airflow in the room where the miners are located. It doesn't stop the miners making the heat but will hopefully not make the heat worse. 2. Reduce the amount of energy consumed This can be done by underclocking or undervolting the miners. Try checking the threads in this very forum related to this. But basically you can't make them produce less heat by cooling them, you can just not add to their heat envelope. To make them produce less heat you have to make them use less energy. Hope this helps. Yeah, that or you could just provide them ventilation: outside cool air (assuming you have access or the climate) in and heated air from heatsinks pulled outdoors. The real key is to ensure you're exhausting the hot air, otherwise it'll just get sucked back through the heatsink and heated further (and so on). I had 15 antminers but I got rid of them as I saw summer approaching - it sure was easy keeping them cool in the winter (with -20C air from outdoors) but I wasn't looking forward to dealing with all that heat in summer temps. |
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I think it's perfectly okay for bitmain to mine before selling and shipping. It's not like you paid them money for a preorder and they use your money to build miners, mine on them, then ship it to you months late.
Bitmain is different than other ASIC's companies. They are trying to setup a win-win situation for themselves and customers. Sounds good to me.
No its not and you wrong. As if miner is build and announced for sale it should be new, not used and against their own tos. When i ordered my first s1 i was happy like kid. but when u getting used item which is overclocked where this will void warranty if anything will happen, its not that great anymore. We are in s2 thread, so acctually people paid shit loads of btc for preorder of units like other bfl or knc. Once units was delivered problems started to piled up. Sorry but you wrong. S1 didnt appear from nowhere. They had them long time before they start selling them. s2 as well and probably now they have kit which is more efficient than s1 and s2 Im not saying anything about delivery etc. bitmain is well above any other asics company. But i dont see why they should mine with my miner or miner wich is mining for weeks and then when i will made order they sending me that miner...Just saying. Exactly this. I could not agree more. I agree, and would add that they certainly shouldn't be lying about the product being new (which they did, repeatedly) even when faced with questions as to why fans were worn out (from overuse) and heatsinks caked with dust. |
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Any PWM fan can do, very easy to choose
Right... Seriously though, if you're going to change it out I wouldn't suggest replacing it with anything less than what it's shipped with (>110CFM >3k RPM). Remember summer is coming. Personally I found the fans shipped with most of my miners were either worn out or cheap/noisy. When replaced with good quality equivalents the noise generated was more of a high volume 'white noise' than a squeal, whine, or other aggravating resonance. I replaced the fans on several of my miners with NMB 4715KL and have been very happy with them. |
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I have two Lketc-miner running here, both supposed to deliver 1 Th/s. That's what they did in the beginning. "Beginning" means: For about a week. Then, the first of the two miners reduced the hashing speed to 500 Gh/s. It turned out that the PSU only deliveres juice on two channels, two are death.
Meanwhile, it is getting warmer outside. And all the sudden, the second of my miners also reduced its hashing power to 50 %. Again: The PSU stopped delivering juice on two ports.
Reactions from Lketc: Nothing. Nada. "Nancy" seems to have disappeared (well, I maybe should try to buy another one, I'm sure she would pop up...).
So this leaves me with additional costs of +400 US$ for two PSU and the feeling, that these miners may not be worth all the money.
We have 20°C outside, and I'm afraid things may get worse once it is getting hot...
The 1000w psus they include are just not good enough, same as the S2 form bitmain. They need to be including 1200-1300w supplies, my Dragons love the EVGA G2 1300w, or a paid of HX/AX 850's Mine shipped with 1200W PSUs. I'm actually really happy with both of them, and I wish I could order more. Attached pic is of my second dragon, seen warming up a hallway while I worked on the rack.  |
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Hi, I added a second PWM fan to S1 (Arctic F12PWM) but on the page "Miner Status" of web interface displays only the fan speed 1 but not those of the fan 2 is right or there is a problem?
Hello and thanks W_M
that's expected you might want to compare your temps with and without fan _installed_ and operating/not operating - I suspect your new front fan could end up jamming up the airflow from the rear fan as it's on the slow side. |
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So, point is that these do get hot and for people with 1 or 2 they may not be able to cool it adequately and not everyone wants to host their miners.
I plan to host 3 sp10 and 3 sp30. I will cool it with air from the house (~20°C atm) and when temp will get higher i will buy an AC for the house. I will put it in a very small room but with high air flow. In add off, i don't plan to stock those appliance horizontal but vertically with a big fan on bottom and big extractor on top. I believe that it will be good for several reason : - heat goes up - horizontal fan make less noise - easier for me to stack it (the room is very tiny) Here my plan : The grey part will be stick to the appliances with a hole to make place for power supplies (I plan do to twice shown on picture). The fan on bottom is... a fan, nothing more  The air extractor will be something like this : http://www.cultureindoor.com/1299-extracteur-winflex-vk-100-mm-250-m3-h.htmlNotice it's from a growshop, they do great pricing. My last concern is about the bottom of appliance getting hot. I guess i will put 1/2 cm between each appliance and let the fan/extractor do the rest. Last but not least, i hate the noise. really, badly, whatever... :@ So, i will isolate the door (got some good experience there) and catch the noise with self-adhesive acoustic foam. Already found some very good foam with an α (alpha Sabine) over 0.80 for frequency over 2kHz. Of course, I've already installed the smoke detector, just in case off :p Tell me what you think and, SP-T, please tell me if putting the miners vertically is a problem... Regards, PS:i shall be delivered on monday, tuesday, so expect pictures soon  I have a similar setup already. A couple of things to consider: - do you have a very good handle on your airflow requirements? Until you do this you cannot size your fans or ductwork. Essentially what you need is to exceed the maximum cumulative airflow of the built-in fans of all your miners - once you have this sorted you can size your ductwork and fans. I'd strongly suggest learning basics HVAC concepts unless you have experience in the area. I too have found that found that hydroponic websites (pot growers for the most part) have a ton of relevant info. - If noise is a concern look into mixed flow fans, which produce high airflow and static pressure but can be very quiet. I'm very happy with my fans from the Soler and Palau TD silent series. Ensure the fans you purchase can handle the airflow temperature! Oh, and buy/use grills on your intakes! Also consider having a spare fan on hand! - vertical stacking is great in theory (I actually run a vertical setup) but keep in mind practical considerations like access to power/data connections both at the wall and to your miners. It also can be much more awkward to swap equipment. - do you have a plan for how you going to channel the air to force it through the miners? The airstream will take the path of least resistance, and the last thing you want is the air going around your miners and not through them - you might want to look into ($$/size/noise) a central ac system which will support your airflow requirements in advance... - I've found a thermal camera (e.g. Flir) is an incredibly useful tool (!!) - finally, consider the impact if one if your fans fails in the middle of the night - I'm not overly familiar with Spondoolies miners, I imagine they have thermal shutdown capability? |
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Hrm, got Rev 3 it seems:
Did you put that hole in the side for the PSU fan ? Or is that a late batch 2 case ? My B2 does not have that case.. Interesting. I am curious as well. This is how they should have been designed. All of my cases are closed and the PSU turned inside, thus blowing the hot air inside the unit. That's an intake fan, not exhaust. |
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Thanks for the response.
I checked it out, it seems to be just hardware schematics, how to use zadig, and info about their GUI for the S2 miner. I didn't see anything about how to talk to their board using their USB connection (other than how to use CGMiner).
Is it possible there is a standard command set to communicate to ASIC miners that is documented somewhere else?
Here's an old version of their cgminer mod: https://github.com/bitmaintech/cgminerMaybe there will be something useful in the code? |
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Thanks to all that have replied to my query. However before I could act upon the advice, the hash rate has started to drop every ten minutes. I rebuilt the rig, I reformatted my sd card, rpi_v2 image copied on to sd card. I followed megabit power PDF file but when I start up the rig, I can't shh my raspberry pi. I have gone through my router and there is IP address for my bitfury, although it says not connected. But either way I can't shh the raspberry pi. Is there something I am missing e.g mining software. I read the megabig power PDF but all it talks about is download rPi_V2.img as my motherboard is version 2.1. Am I suppose to download bfgminer or chainminer? Please help as I am now running at 12 Ghs with 6 red bitfury asic, I'll never reach my goal of 1 bitcoin!
I'd recommend that you go with Chainminer V3. If you can't track it down PM me with your email addy and I'll hook you up. |
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<snip>
Bitcoin community is an ecosystem now and each one of us play different role in it. and every one should have his own reason to step in this industry. What BeeMiner want to do is to dedicated into the hardware manufacturing and developing and gain profit from other people's err.... I mean our effort.
Thanks
jbcheng
Fixed that for you |
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With a few words:
chip= clone ,
software = clone ,too.
Hi Mate, You are very welcome to buy our machine and clone. I doubt you have such capability. Otherwise. Please be quite. Thanks Jbcheng Yeah, with that attitude I'm sure they'll be lining up..  And _original_ mining software in 2 weeks?? More likely a functional obfuscation of the original code in two weeks? As far as capability: all you are doing is packing other people's chips (Bitmine errrr.... Innosilicon) on other people's boards into metal boxes with fans and shipping them. Oh right, and the boxes only work because of the software you err..... Innosilicon stole errr.... borrowed from others. Even the metal box with fans is virtually identical to at least 3 other manufacturers. So don't act like you are curing cancer okay? |
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I'm writing a C program to control a Bitmain Antminer U2 through the USB port directly (not through CGMiner or BFGMiner, etc.), but I can't find any documentation of all possible commands that can be sent/received from this device. I've tried to follow through CGMiner and BFGMiner source code, and I see the COM port API calls, but it would be much easier to have some doc or a user manual (maybe from Antminer) just to list the syntax of all commands.
I'd appreciate if anyone knows where this exists (while I still have some hair left)?
Thanks
You've had a look at their git? https://github.com/AntMiner/AntGen1 |
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I'm sure with all the wild rigs out there, someone must have tried this. So, any thoughts anyone?
After this past weekend where it was 70 outside while pushing 100 in my house due to a few S1's I was thinking of doing the same thing. Summer is going to be a real problem. It looks like you can get an 8' length of 4" diameter flexible dryer duct from Home Depot for 10 bucks... http://www.homedepot.com/p/GE-4-in-x-8-ft-Dryer-Duct-PM8X73DS/100050673Why not go with 6" or 8" flex? Better match for the fan diameter. |
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