this sounds carded to me so be careful if your sending it to your actual address. apple just doesnt give huge discounts to businesses. in fact the company i work for buys thousands and thousands of ipads for the hospitals and macbook pros/imac for student and employee computers each year and the discount they get from apple is 8% and since hes selling them for 30% off that must mean his discount is larger than 30% which not even bestbuy gets that sort of discount from apple so you guys have been warned.....

no the longer legs wont make any difference. i have tried running these vertically without legs on a metal bakers rack and the temp differences were the same. also longer legs means less stability because the center of gravity will be higher and no one wants their miner tipping over. longer legs means a wider base to bring back sturdiness and will use more PLA material and when there is no benefit to longer legs that equals uneeded waste. not to mention the cost of the kits will go up to offset the time and material needed to print them up. a box fan wont help air flow either because unlike the s5's these units are enclosed completely so running a box fan will just waste more electricity and you wont see really any gain from doing that.....not with the s5+/s7/s9 miners at least since they all use the same design.


Sooooooooo no one wants to order any vertical leg kits for their miners ehh?? shoot me a pm if you do

if you guys want better temps get some legs to stand them vertically. i have used them on all my s7's so far and they do work on the s9's too. i have some for sale and i print new ones all the time so pm me if you want to buy a set or more. i have sets with the extended screws and sets without the screws. you will need longer screws to hold the legs in place because the stock ones aren't long enough but if you rather supply your own screws that's fine too.

I also have duct kits that allow you to attach dryer ducts from places like home depot or lowes to help vent hot air away from your miners. i use ducts and legs on all of my miners and it helped reduce temps in the rooms my miners run in big time and the legs by themselves help cool off the chips. I saw a temp reduction of about 10 degrees on my s7's when putting them vertical vs leaving them flat. lower temps mean slower fan speeds which means less noise for the home miner.

not to mention the first couple of batches wont even run at the speeds they advertised....so they didn't make as much before halving as they should have.

if people stopped buying the damn things the price would be lowered. they r gonna tap every single users pocket until they cant get anymore sales then they will start lowering the price. until then they will keep the prices high because who else is gonna compete with them?? i dont see ne other competition when it comes to public miner sales....do you?

i think its funny that people are STILL buying these s9's at the price they have listed. AFTER HALVING these miners will take about a year to ROI....how can anyone expect a year out of these machines when so many are having issues getting a couple of weeks worth of mining time out of them!?!?!. hell the early adopters got a miner that was supposed to mine at 14.xx th/s only to find out they wont be stable at those speeds for very long if at all. people had dead s9's just show up at their door....dead right out of the box! ROI should be 6 months all the way up to about 200 days max. not a year+. please people.....stop buying these things and show bitmain they need to revise their design a bit and provide a more stable and profitable miner. if you keep buying them the price will stay high and you wont ever make your money back unless the price soars to the moon and back which you shouldn't base your investment on those kinds of numbers....only base it on the numbers we know right now.


also im confused about this guy talking about 1000w ac in not being able to produce 2000w dc out....a typical house uses 10/15a breakers in its rooms. older houses use 10a while newer ones have larger ones. my house has 20a breakers for all the 110v sockets so im one of the lucky ones. at 20a i can push about 2300w dc. i can go higher but its unsafe to make out the line 24/7 so its always good to leave some room in there. a good rule of thumb is 1 s7 per breaker at full speed. where i mine i have 6 breakers dedicated to 1 room and another 5 dedicated to the second room and 1 miner is on each breaker. the higher the input voltage the more watts that can be pulled from the plug so if you have 110v ac power you can pull a max of about 2400w give or take a few watts either way for tolerances when making these. if you jack the voltage up to 220v using the very same wires the only difference is the wall socket and the breaker (double slot breaker instead of single slot one since im in the us) then you can top out the wattage at around 4500w safely.....thats using the very same gauge wires the 110v uses.

now if hes saying that his ac breaker tops out at around 1000 watts then maybe he means he has a 10a breaker and that's all he is able to push through it so if that's the case then he is 100% correct....he WILL NOT be able to push 2000w dc through a 10a ac breaker period. anyone that argues that you can do this on a stock unmodded electrical connection is wrong and should read up on how this works a little bit before posting about electricity again. Anyone that is able to push that many watts through a 10a 110v ac line should stop doing it right away otherwise be ready for your house/mining location to burn down.....make sure u have insurance too.

if the guy is saying the later he is 100% correct and you all should say sorry to him and you all that say your electricians should go back to school because its you that is wrong. im no cert electrician so im more of a hobbyist but my step father does electrical work and has since i was a young child and i have always been into watching him do his thing and learning from his vast pool of knowledge. that coupled with real world experience from trial and error type stuff makes me confident in saying what i mentioned above is correct. lets hope steve was referring to the later and not the first part.   

here is a link to one of the listings. There r 2 total.

https://www.ebay.com/itm/201612306974

hey

im just bumpin this thread to say if anyone needs these legs i can make them for them. they dont just work with the s5's either....they work with s5/s5+/s7/and s9 miners. i personally use them on my s7's and they help keep my miners running cool. i also have a duct attachment that will screw onto one fan to make attaching a duct easier. i use ducts for some of my s7's because there is a drop ceiling where i run my miners so it helps cool the room my miners run in.

pm me if interested. i have 4x leg kits that have the screws and ones that dont have the screws. if your using the legs you will need longer screws for the s5+ and above because the stock ones aren't quite long enough. I can also print other stuff if you guys need anything printed. I have a lulzbot taz 6 printer so it has a pretty large printbed.

but do you have another non bitmain psu that you can connect up to the miners or just to the controller to see if they power on. im not saying their monster psu's are bad or anything i just don't have 220v so i never used them but maybe the controller doesn't like the bitmain psu sorta like one of my s7's didn't like my evga g2 1300w psu while all my other miners worked fine with it. its just an option.

those chips temps are wayyyy too high my friend. your running some dangerous numbers. they should never go much higher than 70 degrees c at the chip and each day it runs like that it loses a little more life until it finally dies. if posible i would try fixing this sooner rather than later. i dont want your hardware throwin out that magic smoke.

first how m i supposed to know where the kid lives?? silly boy think before you speak

second he wasn't clear that's why i asked. there's no reason to assume ne one has 220v power and since idk him personally i didn't want to assume pay attention

third you obviously don't mine much. those that have would know psu issues do come up. for example some times a power supply wont power on one miner but it will work on another one of the same model. i had this happen with 2 s7's i have. the psu would work on every other miner i had except one s7. i tried like 5 s7's and all worked great except for one miner. i had to use a dps-1200fb that i modded as the supply for the controller. the psu that wouldn't power on that single miner was an evga g2 1300w psu so ik the psu was more than beefy enough to power on the controller besides if it wasn't all the other miners wouldn't have powered on either. so before you go runnin ur mouth kid ask. don't say my comments r useless because frankly ur ignorant negative comments don't help at all. i was at least offering a suggestion to him and others like him. what did u provide?? absolutely nothin! so take ur bull elsewhere please or be more polite to your fellow community.

maybe s9's are just arriving dead. i wasn't stupid enough to buy s9's at the current price and risk tens of thousands of dollars until things had a better roi but that doesn't mean i cant try and help people that need it which is more than u can say based on that ignorant reply. 

hmm which new psu are you talking about?? the miners with the psu mounted on the top? those are only supposed to reach 2.7th/s on the default config. or do you mean the separate 1600w psu (if so those arent "new") they sell? that psu only runs on 220v power i believe so are you sure your using 220v and not 110v?? try using another psu with 4 pci-e power connectors and hook 1 up to the controller and the other 3 to one of the boards. power the miner on with 1 board at a time and see what the hashrate for each board is. this will help you determine which board has issues.

1. no when the unit loses internet for long periods of time (seems random...sometimes minutes and other times almost an hour sometimes never) the fans spin down to a slow slow rpm. i have seen it happen in every miner since the s5 was released so its not something im making up. all of the miners since the s5 are set to hash locally when the network drops.....bitmain told me this. they said it discards the shares over and over and its supposed to stop but it doesn't. only the fans stop which is when temps spike and can be dangerous.

2. 8-12 months is too long since new miners come out before the old ones break even. if and only if the diff stays the same will these break even if they last that long. but we both know the diff wont stay the same. i say the diff because the diff will raise along with the price so while you can mine for a couple of weeks at what looks like an awesome profit once the halving happens your roi will quickly tank.

3. yes you can sell your miners on and make a few bucks back but i don't recall the name of the game being lets break even....you invest to make money not lose it or get back what you put in a year later. also if you think ur miner will be worth 1300 almost a year from now then idk what to say.....the price of btc will have to soar and soar to break even and make this purchase worth while. I hope that does happen for all of your sakes but the reward vs the risk isnt good enough to jump in like u guys did.

4. running them at home in the summertime will cost you more than it would in the winter. power prices r higher in the summer per kwh and the cost to run an air conditioner is higher than running a heat pump (we have heatpumps mostly here and gas heating) so that will hurt your roi times as well. just calculating the cost of the power just to run it isnt the right way to go about calculating the cost to run the miner in the summer.

only silly people don't care about ROI! lol. good thing hes an animal i suppose.

the fan speeds aren't the same for both fans. one is supposed to spin faster than the other if im not mistaken so swapping the fans will mess up the miners ability to push/pull the air out of it.

im blown away by the number of people paying these ridiculous numbers for miners that wont ROI in 6 months or less. I saw an article saying the S9 was an amazing investment and they even said if everything stays the same (diff, price, etc) then it will break even in a little over a year.....a year!?!?! how is this a good investment guys?? just wait until halving.....the price will need to drop otherwise they wont sell any miners. if the temp numbers people are throwing out there are true how can you expect these things to even last a whole year?? 70c at under clocked speeds is just too effin hot! running my s7's at a lower fan speed but still at full speed doesn't make my temps go this high....if they have the same issue the s5's and above have with burning themselves up once internet goes down for extended periods of time you all r gonna be screwed.

no one is telling the OP to stop speculating or posting these types of threads. someone else came in here and was telling us that we dont know this and that so we must be wrong.....but it seems like you agree that the s9 isnt worth purchasing at the prices they are asking for it. but again no one is directing any harsh words towards the person that started this thread....

wrong. operating costs can be figured out no matter what. the cost of power never goes down. it only goes up and not by much but power companies put out the increases almost a year beforehand so the cost can easily be calculated. on top of that the cost to mine in the summer is higher not only because running the ac costs a lot but also because power companies charge more for their power in the summer for whatever reason. your right that no one can guesstimate the exact earnings but the calculations i did were based on the info we do have. one thing is certain....if the price goes up the diff goes up so if your arguing that the price going up will make u reach roi because you will mine more per day then i suggest you stop mining right now and sell all your s9's before they lose their value because this isn't the right investment for you. the difficulty will shoot up. the only way the difficulty wont go up is if the price drops and or doesn't change from the price per btc right now. im not sure why its so hard to understand what hes saying. hell im saying the same thing....buying s9's at this price is retarded. no ifs ands or butts about it. if you think you will break even in a reasonable amount of time then again i say this isn't the type of investment someone like you should make. even me with free power wont break even.....that's saying a lot.

to make sense we would need to see a huge drop in diff and a huge increase in value per btc. but the more btc is worth the more people will mine it....the less its worth the less they will mine it. to ever assume that suddenly people wont mine something that is growing in value more and more is silly. think about it like poachers.....if ivory was worthless do you think people would be killing animals illegally to get it?? nope! so why would you think the value of btc going up means less people will mine it?? if you think it show me historical trends that prove your point. you cant prove it one bit so just stop arguing about this because the info give has been proven many times over.

i have free electricity as well but i wouldn't say roi needs to be 60-90 days. that's just giving customers money. a reasonable time frame to aim for is 6 months or less. what should have stuck out to s9 buyers was how bitmain sold a miner that based on current calculations would break even in way under 6 months. They never do that. but people were blinded by greed and got alot of money taken from them this round. hopefully they learn their lesson this time and dont buy new hardware that costs so fricken much! i wonder what the cost of the miner will be after halving. either way i know it will be a better roi if you wait for a later and probably less buggy batch.

the way i see it bitmain is trying to find the few people that see a high hashrate and low ROI times that DON'T know about the halving that's fast approaching. when you look it says it will ROI with $.14 per kwh in about 4 months which is awesome but what no calculator states is the roi times go through the roof once the rewards aren't as much. to provoke buyers to order the miners they r releasing it in a very limited batch which makes noobs think "nows my chance!" and they jump on it. i cant believe that other guy ordered 2 of these things and almost ordered a third. does no one do the math anymore? or does everyone jump on the newest miner released and enjoy being the overpriced beta testers?

with that said if the price was reasonable i would deff upgrade to these things. i mean who wouldn't?? but at $2160 a pop not including the $32 i would have to pay for fedex to overcharge me for import fees because they have a minimum fee of $25 for things over $2000 and an advancement fee of $7 which gets tacked on even if you don't want them to advance anything for you. i genuinely think everyone that purchased this first batch were silly and didn't take the time to do the math and for that u will lose out. next time you want to lose money be sure to send it my way