This board with less chips, lower hashrate, but with greater power usage, My guess would be this was the original batch 1 that just absolutely failed expectations and resulted a re-design leading to the boards that are in the B1,B2,B3 etc .... They did say they had a very limited number of them.
I suppose that is possible with Batch 6. I was looking for them saying, "limited number of them" but I could not find it. Only time will tell when we see B7, B8, etc... I disagree, it was B4/B5 that was limited. this one is not. Also, boards are completely different with 135 vs 164 chips. I believe that from now on it will be just B6 or alike. Perhaps, this configuration is more amenable for the next gen of chips. With btc at 388, I don't know, but if we correct to $325 and btc price/machine stays, I would be getting some. Besides, you can safely use worse PSU's if you got them. Ack, my bad. I forgot these were batch 6. I had B4 abd B5 on the mind with the limited. I have no clue then. Different design, different specifications, should have a different modeling number.... Its already a nightmare to figure out what S7's are what just with all the differences between B1 thru B5, now add in B6 with a different board design and specifications - then looking the same from the exterior..... buyer beware when buying from a re-seller or buying used. |
|
|
|
Not sure if this has already been mentioned in the thread:
BITMAIN did correct the specifications on Batch 6 to say the following: "5. Chip quantity per unit: 135 x BM1385"
I still find it confusing it says:
2. Power Consumption: 1042 W + 10% (at the wall, with APW3, 93% efficiency, 25C ambient temp)
3. Power Efficiency: 0.25 J/GH + 10% (at the wall, with APW3, 93% efficiency, 25°C ambient temp)
The reason this is confusing to me is because it does not say, "+/-" but only "+"
The BM1385 chip is capable of 32.5 GHS per chip at just 0.216 Watts of power usage per GHS with 0.66V core voltage.
I'm just totally confused at the moment. Can someone chime in to help me understand if it is 1042 watts at the wall @ 600MHz or 1,146.2 watts (+10%) ??
The same instant bitmain put up b6 up, and was ignored like I usually am. https://bitcointalk.org/index.php?topic=1165628.msg12893262#msg12893262and another post regarding efficiency 2 posts down In a way or another this last batch isn't as efficient as all previous s7. Up to (not saying it IS) 15% less efficient I'd say. And not a single word has been mentioned by them regarding this and they couldn't even put actual efficiency. They just put this "+" stuff to misguide people. What do you expect? Really, Bitmain is the only manufacturer of mining equipment for the "Home" miner. They have the monopoly and can do whatever they please. Their mentality is - If you don't like their policies and practices, well, go find another manufacturer. Till there is real competition, expect this crap. My opinion is .... there is a lot of instability within the chip. That is why there are so many different versions, hashrates and clock speeds. So instead of just tossing the QC failed boards, they have been individually testing each hashboard to grade the board for the different batches therefore mitigating their production losses. This board with less chips, lower hashrate, but with greater power usage, My guess would be this was the original batch 1 that just absolutely failed expectations and resulted a re-design leading to the boards that are in the B1,B2,B3 etc .... They did say they had a very limited number of them. It would make sense considering their past behavior of recycling the QC fails. |
|
|
|
Hi, does anybody knows how to stop beep sound when connection to net is down? I cannot find any controler of "beep sound" like S4 had. Thanks for any advice.
I don't think the S7's have a speaker to notify you when the internet connection goes down. I may be wrong but I though that's how they designed them. I have two now .. both of them beeps like a hell  ..so it does I pulled the buzzer off on mine, and if you're careful it may actually be replaceable as the pins also come out. You'll likely void your warranty etc etc. A small squirt of silicone sealant in the soundhole of the peizo element effectively hushes the loudness, but allows just a minute amount of audible tone to alert you if you are really close by. This probably would not void the warentee, but who knows. I'd live with it till the warentee dies, then do a tear down for cleaning of which, if it was bothering me, I'd de-solder the piezo element to PROPERLY disable the noise without stressing the circuit board. You could always look into grabbing a router that has failover capabilities..... and tether your data connection to your cellular phone -- if one connection fails, it automatically switches to the back up connection. I have something similar here. I have my cable connection, redundant #1 is the near by golf course's free WiFi ( they use DSL ), and redundant #2 is is a Virgin Mobile Cellular Hotspot. |
|
|
|
it was noted here on a multiple occasions (first by fullzero, I believe).
dmwardjr had a post on why it is possible (something to do with electrical properties of materials at different temperatures).
From a historical perspective, not a surprise since Jupiters had the same shtick.
People even plugged openings in the boxes.
The sweet spot for me balancing hw errors and th/s is around 53, which goes against everything I know about electronics. The rev 1.4 boards I have are perfect at 51, the rev 1.5 boards are perfect at around 52 and the 1.6's are perfect at 53. I will dig for those threads since those temps will likely (?) not be good for longevity. Naturally, I can only get around those temps by observations since I use CFM since I live in Texas, but color me concerned balancing short term profitability and longevity. I will dig for those threads. Thanks, Ufo The v1.4 , v1.5 and v1.6 boards you are referring to, is that the revision number that is printed ~ON~ the circuit board just under the molex connector? ...or... is that the revision number that is on the Antminer sticker found atop the logic board housing? On my miners, the circuit boards have v1.5 printed in white whereas the Antminer sticker on the logic board housing state v1.8 ... I think you can see my confusion that needs clarification. |
|
|
|
|
I'm looking for information on how to tell what batch number S2 are. Wether it be design features or board numbers....
Design features - It seems that batch 1 had a plain cover and the hash boards had 2 piece heatsinks per the pictures I'm finding...
I have an S2 that has a plain cover, foam strips to hold the hash boards in place and the hashboards have a 1 piece heatsink that covers the whole board. No hole in the chassis for a PSU fan.
I also have several S2's that have ANTMINER pressed into the cover, a metal plate that holds the hashboards in place, and a hole in the chassis for a PSU fan.
Again, I'm looking for how to identify the batch numbers....
thanks
|
|
|
|
Ok, back on to the S7 topic ..... I've been hashing along for over 24hrs now. No heatsinks have fallen off ........ yet. I did have a brief issue with the following miner when I updated the IP address from the stock IP address. It sat there all dumb flashing the red light and beeping for a couple minutes. Then it woke up and has been hashing ever since. That S7 B3 while hashing along, it will now flash the red LED. Maybe 1 a minute, sometimes 2-3-4 times in a minute. So I looked at the Kernel Log to find out what is going on DRV FIFO EMPTYThat's what that red LED is indicating. I'm assuming that the miner is not getting the data to be hashed quick enough causing the FIFO buffer to run out of data. I was hashing with the stock firmware and was having this issue. To see if the updated firmware would fix this, I updated all the miners to the latest firmware on the Bitmain site.... Just this one S7 is having the DRV FIFO EMPTY issue. I've tried different ports on the switch, I've tried different CAT5e cables thinking maybe there is some issue with a switch port or a patch cable... nada, still tossing that error. Any suggestions to tweak this thing?  ? ALSO............ I'm noticing that the S7's like to bounce around in difficulty on Nicehash ... whereas my S5's are rock solid at 2048. Would it be better to have a fixed difficulty rather than a difficulty that is bouncing around frequently? How would that be done? |
|
|
|
Boy did I pick a bad day to buy or what ? *sighs*
AHHHHHHHHH!!!!! what a roller coaster ride.  Some whale just dumped 40BTC on Cryptsy.... TANK goes the price .... I'm hoping that the peeps manipulating the BTC market don't pull the plug just yet.... let it build a little bit more while I mine with these S7'd so I can get some more BTC for more S7's  Come on now, 40btc is hardly a whale, just someone who is happy to cash out at $400. 40 BTC is more than I've ever seen.... ;-) and is a pretty good size hunk of beer n chicken wing money |
|
|
|
Interesting price adjustment from Bitmain. Decided to do this again instead of buying an S7  Good luck everyone. Boy did I pick a bad day to buy or what ? *sighs* AHHHHHHHHH!!!!! what a roller coaster ride. Some whale just dumped 40BTC on Cryptsy.... TANK goes the price .... I'm hoping that the peeps manipulating the BTC market don't pull the plug just yet.... let it build a little bit more while I mine with these S7'd so I can get some more BTC for more S7's |
|
|
|
|
For those who are interested in the fan noise of an S7.... I took a couple readings...
For reference, I have my S7's set up with 100% fan, I'm still a pretty firm believer of keeping electronics cool for the longevity of the investment. If anyone wants dB readings of different fan speeds, I can do that, just let me know. ( Maybe I'll put together a chart )
Measuring a single S7 B3 with 100% fan, also in the sound reading was the power supplies singing along but they were further back from the dB meter.
85dB at 1ft from the dB meter
75db at 3ft from the dB meter
~A~ weighting vs ~C~ weighting did not produce much diference. ~A~ was maybe 1-2 dB lower than ~C~ weighting
For reference:
Weakest sound heard 0dB
Whisper Quiet Library at 6' 30dB
Normal conversation at 3' 60-65dB
Telephone dial tone 80dB
City Traffic (inside car) 85dB
Train whistle at 500', Truck Traffic 90dB
Jackhammer at 50' 95dB
|
|
|
|
|
I received my S7 B3's today.... got them online... AND... I found a block. Too bad I was not solo mining otherwise I'd be buying a few more S7's
|
|
|
|
Anybody using 3 PSU's to power one of these?
I'm using 3 power supplies per 2 - S7's Till the IBM 2880W power supplies arrive, I'm using 1 - DPS-1200FB (1200W) power supply per 2 hash boards, there is yet another DPS-1200FB that is dedicated for powering the logic boards. That way I can power on all the hash boards, then switch on the logic as Bitmain recommends. |
|
|
|
I need spare S7 FAN
any idea where to get one?
What is the make and part number of the S7 fan? I'll see if I can cross reference with one of the hundreds of fans I have here. My S7's are still with FedEx... suposivly being delivered today before 12 noon... they have 36 minutes ( 11:24am now ) YAY !!!! My S7's B3's have arrived !!! This was an Oct 20th purchase. The hash boards are Version 1.5 ( printed on the circuit board ) The "model number" sticker says S7 version 1.8 Now to pull the power supplies from the Ol Antminer S2's and fire these pups up. I do not see any loose heatsinks.... fingers crossed.... |
|
|
|
I need spare S7 FAN
any idea where to get one?
What is the make and part number of the S7 fan? I'll see if I can cross reference with one of the hundreds of fans I have here. My S7's are still with FedEx... suposivly being delivered today before 12 noon... they have 36 minutes ( 11:24am now ) |
|
|
|
someone here who is thinking about mineral oil cooling, like this:
(immersion)
or is this cheaper?
(fan)
Fan's are by far cheaper. That is why almost every miner is one with fan's. There are a few water cooled miners, but very few. Half have been modded to get water cooling. It's been a while since I've seen a mod even using immersion. I'm thinking of doing just that .... mineral oil immersion cooling and see just how far I can push some miners. Not the S7's though. I'm not messing with the S7's till the warentee is up, THEN ... I'll mess around with them sandwiching the hash boards between two slabs of aluminum heatsink extrusion instead of using the little stock sticky heatsinks among other things. With winter coming, using a mineral oil immersion cooling system, I can easily extract the heat for the house, then send the mineral oil loop outside for good ol Mother Nature refrigeration and chill the chips, boards, wiring, connectors ... everything. Every part of the miner gets in contact with the cooling medium - the mineral oil ( IE Transformer oil ). I've been wanting to do this since the Block Errupter Cubes came out but technology was changing and improving so fast that by the time I'd plan how to do it, the miners would be obsolete. Now that the technology advancement is slowing a bit, I think I can play with mineral oil cooling. Now if you REALLY wanna get serious, just start imagining what you could do if you had a couple piping loops that went into the earth like a geo-thermal cooling system, except using the earth's natural 50-55 degree F. ground temp to chill the mineral oil any time of the year. |
|
|
|
is there going to be a batch 4?
they are most likely fixing to either introduce lite or drop the price to be competitive with others in December and especially by January. I would be hugely surprised if they keep both the premium and the model. Since they didn't use the model number ~ S6 ~ ... maybe that's what the 3.xTH/s "S7 lite" will be ..... With how cut throat the bitcoin hardware market is.... the absolute addiction to getting the best efficency, supply and demand ( no more S7's at 4.86TH/s )... I'd have to say that the 3.x TH/s S7 lite will be the same price as the S7 B3. WHY NOT? Only game in town, till someone else comes along and creates some competition.... then and only then will there be lower price models. |
|
|
|
Did anybody try to put S7 in the attic instead of regular floors, basement or garage? We don't have basements here, typically.
What would be a worry?
Sound should not be a problem, not sure about heat, although with fall coming (it is still balmy 75F right now), maybe it will be OK?
An attic would be too warm. You have to remember, there is Mother Natures nuclear powered heater that is beaming heat onto your roof, that roof then absorbs the heat and then transfers the heat to the air in your attic space. Unless you can move a lot of air through the attic to make the air temp in the attic the same temp as the ambient air temp outside, I think it will be too hot in the attic. |
|
|
|
Anyone powered his S7 using only 1 PCi-E 6 per board ?
I have powered them with only 1 cable per board for the last 2 days and they were working fine
Just today I read somewhere that it actually needs all 3 cables per board.
That's over 350W DC for 1 cable. The connectors/pins are only rated for a maxijum of 324W, and those ratings aren't overly conservative given the demanding environments mining puts on them (vibration + high ambient temps). Plug more cables into them, like now... Edit: Plus it violates Bitmain's ridiculous warranty terms... I'm doing 8 total, 2 each to outside boards and 3 to center plus controller. That way I can use 2 dell 750 PSU with 8 cables. Using high quality 16awg cables and breakout boards. No issues. Been monitoring temps of connectors and cables. Avg connect temp is 79F. Miner runs at 55-59c and ambient temp is 69-72F. That would be 175w per cable on the boards with 2 plugged in. Consumer PSU may not handle this since cables are lower gauge and will heat up more. The wire gauge on the bitmain 1600 psu's is pretty teenie. Maybe that is why the "three cable rule" is pushed. My corsair rm1000 modular cables are pretty beefy. I use two per board with the daisy chain from one of them, filling all connectors. The board next to the controller socket gets the daisy chain from the second cable. I'm not sure what the wire gauge number is on the Bitmain power supplies, someone will have to see if there is some printing on the wires and post the AWG size. BUT, for reference, when I made the cables for the DPS-1200FB power supplies I have, I used 20ga wire.... its what I had laying around that would fit the pins I have.... Calculating the load per wire, I divided the maximum amperage the power supply could produce across the 6 Molex plugs, the amperage per pin/wire was 5.5 amp.... WELL within the specification for the wire size and insulation type using an NEC wire chart. YES, insulation type is also a factor. You can have anything from varnish coated wires, plastic insulated, silicone insulated, or even teflon insulated. Some insulation melts at lower temps, so if you have a Molex connector that heating up because of old age or you have been plugging and unplugging a lot and you have cheap ass plastic insulated wires, more likely you will have a meltdown from insulation melting then wires shorting out than if you were running a smaller wire gauge, same amperage, and teflon insulation. You might think silicone insulated wires will handle the heat... somewhat. Silicone insulation is used when maximum flexability is required, or is in a higher heat environment, or is carrying higher voltage (think 1000V or more). Silicone insulation is not very good when its in direct contact with a high temperature material such as a wire which has a contact that is micro arcing causing the wire to heat up massively.... it will melt with relative ease. |
|
|
|
Anyone powered his S7 using only 1 PCi-E 6 per board ?
I have powered them with only 1 cable per board for the last 2 days and they were working fine
Just today I read somewhere that it actually needs all 3 cables per board.
wow that's gutsy. cables not getting warm? I'd also be worried about the connectors, sure they'll be overspec'ed but not infinitely. As I mentioned when someone asked about running with just 2 connectors powering each board ... The Molex Mini-Fit Jr pins are rated for 9 amp maximum. HOWEVER, its not a continuous rating. The friction fit of the pins also introduces a resistance, the older the plug on the power supply, the looser the pin to pin contact thus increasing heat produced and potential "micro" arcing which then DRAMATICALLY increases pin temp. The inserting and removing of the plug from devices "stretches" and bends the contacts, the first time a plug is used, its the strongest contact, but as heat is produced due to load, the springyness of the contact material diminishes and the connector will loosen up on its own with time. I can post some pictures of some of the Molex Mini-Fit Jr connectors from an Avalon that was running stock clock that just had enough of running continuous moderate amperage - not near the maximum- through the pins.... nice n chared and had a small fire which delaminated the circuit board and required extensive modifications to the board to get it running again. Unless you are made of money and can afford a $1600 doorstop... go right ahead.... Also, make sure your renters / home owners insurance is up to date and would cover such an instance.... its only a matter of time when taking that kind of short cut. |
|
|
|
|
Clearance delay
WAUKESHA, WI
Ship date:
Fri 10/30/2015
SHENZHEN CN
Scheduled delivery:
Pending
KEWASKUM, WI US
Shipment requires importer's registration/identification number for clearance. (Examples include EIN, SSN, VAT, GST, RFC, etc.)
Recommended action:
Importer must provide the required registration/ identification number.
No scheduled delivery date available at this time.
------------
Still stuck. Come on Bitmain, Send the info required to FedEx so I can get my miners....
|
|
|
|
|
Show Posts
