Well, after I am been thinking whole night about PSU to fire up S7, I have decided to call up and electrician and get a 240V dedicated circuit installed at my home for my S7 Batch 3 and APW3-12-1600-B2 PSU. Any suggestions?
You will be happy you went this route. If you are getting a 30 amp circuit, you can have 5 x S7's on that one circuit. A 30A 240V circuit takes 2 lines/poles of 120V 30A connections. This would mean its using 60A of 120V. 60A at 120V would also allow for 5 x S7's. Why pay loads of cash to change existing electrical layout if you can avoid it? ROI is already hard enough to achieve no? If you have a 200 AMP Main Service Panel, you are limited to 200 Amps REGARDLESS of whether it's 120 Volt or 240 Volt. A 30 Amp 240 Volt circuit does not take away 60 Amps of 120 Volt. A 30 Amp 240 Volt circuit has taken 30 Amps of 120 Volts [When measured in amps]. The main service panel is limited in "AMPS" not volts! Yes, it's limited in volts in the sense that your main service panel in you home is rated for 120V/240V. Other panels, especially for industrial use, can be rated at much higher voltages. So, again, your main service panel is limited in amps NOT volts. A 30A/240V circuit does not mean 60 amps worth of 120 Volt circuits have been kept from installing in the main service panel. I will say this: 60 amps worth of 120 Volts has the same power (watts) as 30 Amps of 240 Volts. You could have a 30 amp/120 Volt circuit. However, it would not have as many WATTS (POWER) as a 30 amp/240 Volt circuit. The main service panel is not limited with a measurement in watts. It is limited with a measurement in AMPS. Your amount of watts (power) used in the main service panel will be determined by what voltage or voltages used in the circuits wired to the main service panel. |
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Well, after I am been thinking whole night about PSU to fire up S7, I have decided to call up and electrician and get a 240V dedicated circuit installed at my home for my S7 Batch 3 and APW3-12-1600-B2 PSU. Any suggestions?
You will be happy you went this route. If you are getting a 30 amp circuit, you can have 5 x S7's on that one circuit. I still like the IBM 2880W PSU's with J4bberwock breakout boards and 3 feet PCI-e cords made by J4bberwock for the breakout boards. The IBM 2880W PSU's can be purchased used for $60 to $75 quite easily. The breakout boards can be had for $55 to $65. The 3 feet cords can be had for $3.25 each + shipping. So, with one PSU, you can quite easily power 2.5 x S7's versus 1 x S7 with the 1600 watt PSU. If you are curious about the size of this PSU, here is a link to see my hand on the PSU as a reference for size: https://i.imgur.com/n6peQ8q.jpgAnother photo with my hand for thickness of the PSU and another with the PSU connected to two S7's with the 3 feet cords (16 AWG) purchased from J4bberwock: http://imgur.com/a/kRUGv |
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HX850 has 6 so plenty. You can use the data table in my PSU comparison. Thanks for clarifying. Appreciate the link for the PSU comparison as well. Looks like you did a lot of research there. |
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Just tested loss of internet with my batch 1 S7 and my batch 3 S7. I run with a proxy to combine all my miners to a single network connection. This runs on a local machine. I left my LAN connection from the two S7's to this machine. Then I disconnected by DSL link. I continued to monitor the S7's with their web interface.
For the first 10 minutes, the proxy continued to fool the miners that all was well. After about ten minutes the S7's started beeping. Checking their status, both showed the connection to the proxy server as dead. The 5 second hash rate dropped rapidly. Both S7's have their fans set on manual speed at 40%. I left things this way for another five minutes, observing that the fans continued to spin at their normal speed. The chips cooled down.
After another 10 minutes, I reconnected my DSL service and established pool connectivity. Within about a minute, both S7's were back to normal, showing a connection to the local proxy and the 5 second hash rate building back up.
If there is an overheating safety problem with the S7's either:
1. It does not affect my two units
2. It is intermittent and may hit my two units some time in the future if there is a network outage
3. I may have bypassed the problem by using the fixed fan setting.
I am using the firmware originally supplied with the two units. 1.5.3.0, file date September 15, 2015.
Thank you very much for your time, investigation and sharing your findings with us. |
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Thanks for the update, BITMAIN WARRANTY.
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When I set up my 240 volt dedicated line, I plugged a 120 volt fan into it just to check if power was there. Well, the fan worked.... on super speed. If I had a hair piece, I would have lost it.  Needless to say, I unplugged it quickly. LOL  Thanks for sharing |
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That psu has six 30 amp rails.
You will need to be very lucky to get it to work.
If you do two cables to one rail five times you will be using 5/6 of the rails at a max of thirty amps each rail.
You will over load a rail if you put three cables on it.
So to load that psu correctly you will need to research how a rail feeds to the pcie jacks.
Good luck as it can be done correctly
Hmmmm You're actually right about that. It makes you wonder why they bother labeling it the wattage they rate it if there is risk of overloading a rail. Thanks for further investigating, philip. It may be too late. He may have ordered the PSU already. EDIT:
My Corsair AX860's have what is called "Active Power Factor Correction (PFC) with PF value of 0.99" I've had two of them powering an S7 since Friday, October 16 and the cables are not even warm. The PSU's are not hot either. I'm not quite sure what Power Factor Correction implies. I'm wondering if this means it has a means of distributing the the power appropriately where it needs to go without over heating?
Here is a link to the Corsair AX860 with specifications: http://www.corsair.com/en-us/ax860-atx-power-supply-860-watt-80-plus-platinum-certified-fully-modular-psuAgain, I'm a big fan of buying used server PSU's like the IBM 2880W PSU's powered off 240V. |
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Now, I need to find the way, how much will be daily power consumption.. :-( I have no idea
This calculator does an excellent job figuring it out for you. Device name is not important: I put "S7" anyway. Enter in the number of watts with NO COMMA'S: I put 1,210 as an example WITHOUT COMMA'S. You would put 1210 watts WITHOUT COMMA'S if you are running only one S7 at stock settings. If you had multiple S7's, multiply 1210 x the number of S7's you have. Don't forget the watts of your box fan(s) and/or exhaust fan(s). They burn wattage as well. My peripherals, such as my 48 port TP-Link switch, router, modem, etc... uses a very small amount of power (watts). So, I did not bother including peripherals. Enter in the kilowatt hour cost: My example was 0.034 [Which is 3.4 cents per kilowatt hour] Enter in the number of hours each day the rig will run: I put 24 hours a day in my example Here is the link: http://www.electricity-usage.com/Electricity-Usage-Calculator.aspx?Device=S7&Watts=1210&CostPerKWH=0.034&HoursPerDay=24 |
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no, i didn't, as i usually wait a few days-this saved my hide a couple of times when upgrades were bad.
upgrade might help, but it seems that it is a problem that migrated from s5 to s7 and if it was easy to fix, they would have done it long time ago.
Thanks for the reply. Well, I hope this fixed it. I guess we will find out from someone soon enough or we never will find out which means it fixed it. Dmwardjr, have you played with the manual fan settings? Not yet, I've left everything at factory settings except the pool information, the name of the rig and it's password. I probably will get a couple of Corsair AX860's in another room plugged into 120 Volts and check it out to see if the fans stay at 90% after I disconnect the CAT6 cable from the controller. EDIT: I have a 50 feet ethernet cord to get the S7 connected to the switch from another room. I need another room that is away from the other S7's to be quiet enough to listen. I have not run any other CAT6 to jacks around the house. I use wireless everywhere else. |
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see my old posts in this thread. I wrote here about it but nobody wants to hear me. Photos of burnt S5 are in the thread of the picture your mining... only one time fall me internet connection..
I am skeptical about s7 if bitmain no fix this dangerous FAIL. One mistake and you lose 2000usd(miner+psu+tax). If you put them in the data center, you are waiting for nearly a year return on investment.
I saw it. I just never responded to it. I'm going to find out if it fixed it one way or the other fairly soon if no one else does. |
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people are being surprisingly nonchalant about it.
...I woke up at 3am this morning and at first could not figure out why.
then i heard a tiny noise coming from s7 (much less than s5)
;run to it, Internet is down ("internet not working well" situation)
miner is still doing something and fans are on very low, and air is coming out quite hot.
Thankfully, I had a Vornado fan blowing into intake for such situations and to help with cooling, so no critical overheat occurred.
Internet came back within 2-3 min and it was back to hashing.
all i am saying: beware and try to adapt. i can practically guarantee that it WILL happen in large hosting because usually service guarantees just 98% uptime.
If service loses internet, but power is on....
I'm curious... Did you already have the October 23 Firmware update on this rig? no, i didn't, as i usually wait a few days-this saved my hide a couple of times when upgrades were bad. upgrade might help, but it seems that it is a problem that migrated from s5 to s7 and if it was easy to fix, they would have done it long time ago. I have a question about manual fan speed setting. If you set it to 90% does it stay 90% even when the internet goes out? Or does it cycle down and back up to speed? That would be great if it just kept up speed. Damn good idea. I'm not willing to disconnect the internet to find out. I would have to take one rig away from all of the others to listen. Why? Because without internet, we could not log in to it to find out. We would have to be next to it away from all other rigs to listen to the fans. I'm not willing to disconnect all 9 of mine to find out. I don't have 240 anywhere else in the house with a NEMA L6-30 outlet. I suppose I could do it with my corsairs at another location. I'm just not willing to disconnect to find out. I'll see if someone else does it first. If they don't, then I will. |
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no, i didn't, as i usually wait a few days-this saved my hide a couple of times when upgrades were bad.
upgrade might help, but it seems that it is a problem that migrated from s5 to s7 and if it was easy to fix, they would have done it long time ago.
Thanks for the reply. Well, I hope this fixed it. I guess we will find out from someone soon enough or we never will find out which means it fixed it. |
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It appears to have ten (10) 6 pin connectors for PCI-e ports. It also "says" it is 12 + Volts. As long as it's 12 and not too much less, you will not have to be concerned about hash rate or HW errors. |
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people are being surprisingly nonchalant about it.
...I woke up at 3am this morning and at first could not figure out why.
then i heard a tiny noise coming from s7 (much less than s5)
;run to it, Internet is down ("internet not working well" situation)
miner is still doing something and fans are on very low, and air is coming out quite hot.
Thankfully, I had a Vornado fan blowing into intake for such situations and to help with cooling, so no critical overheat occurred.
Internet came back within 2-3 min and it was back to hashing.
all i am saying: beware and try to adapt. i can practically guarantee that it WILL happen in large hosting because usually service guarantees just 98% uptime.
If service loses internet, but power is on....
I'm curious... Did you already have the October 23 Firmware update on this rig? |
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I think 3 HX850's would do it.
HX850 has 4 pcie connectors on the modular psu.
Each hashboard on s7 is 400 watts.
One of them can power the controller with the extra pcie
s5 is 300 watts per board.
I found is rather scary when you just reconfigure a running s7 that the fan speed drops so low so quickly.
It should ease off slowly allowing the chips to cool a bit.
I agree. I'm a minimalist though.  I understand him doing this if he already has these on hand and wants to have minimal up front costs. If he plans on adding more rigs in the future, it's best to safely gain access to 240 Volts and purchase "used" server grade PSU's with breakout boards. It's cheaper and able to power more rigs. Yes, gaining access to 240V dedicated circuits may cost a bit in the beginning. Especially, if an electrician is paid instead of doing it yourself. It turns out being cheaper afterwards as more "used" server grade PSU's and PDU's are used to power hardware. Also able to power twice as much hardware than one could with 120 Volts. |
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After looking at it closer, it may very well have 10 x 6 pin PCI-e connections because of splitters or pig tails on some of the cords. It says the "value" is "10" on 6 pin PCI-e cords.  |
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My only concerns with that PSU is the following: It says it has 8 x PCI-e ports. You need 10 x PCI-e ports OR you need at least 2 PCI-e cords provided with the PSU that have splitters. Which will provide the 2 additional PCI-e cords needed to power all 9 ports on the 3 blades and the 1 port for the controller. It is hard for me to tell by the photos if at least 2 cords have the splitter [Extension with addition 6 pin PCI-e male connectors] on them. |
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So just to verify, wil I be ok with 3 Corsair HX850's to power a single S7? One PSU per blade with the third also powering the board. I have these PSU's sitting around after selling off the 3 S5's they were powering.
You would be okay with 2 of those. Don't need 3. Make sure you use all 3 PCI-e cords on each blade because the gauge wire for the PCI-e cords provided with the HX850 PSU's are small compared to others that are custom made. If you had custom made PCI-e cords that are 16 gauge like mine, you would be fine with 2 PCI-e cords for each blade. That's my opinion. But I believe they only come with 4 PCI-e connectors each, and I need 9+1 to power it up, right? I edited my previous post to say if the HX850 does not have enough PCI-e ports, you will need 3 x HX850's. That was the reason I bought the AX860. It has 8 x PCI-e ports and it's platinum rated. I use 240 Volts now for IBM 2880W PSU's that are platinum rated with breakout boards that have 22 x PCI-e ports. |
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So just to verify, wil I be ok with 3 Corsair HX850's to power a single S7? One PSU per blade with the third also powering the board. I have these PSU's sitting around after selling off the 3 S5's they were powering.
You would be okay with 2 of those. Don't need 3. The only way you would need 3 is if the HX850 did not have a sufficient number of PCI-e connections. I'm not familiar with how many PCI-e connections the HX850 has. I have a lot of AX860's laying around. They have 8 PCI-e Connections on the back of the PSU. Make sure you use all 3 PCI-e cords on each blade because the gauge wire for the PCI-e cords provided with the HX850 PSU's are small compared to others that are custom made. If you had custom made PCI-e cords that are 16 gauge like mine, you would be fine with 2 PCI-e cords for each blade. That's my opinion. I used 2 Corsair AX860 Platinum PSU's to power one S7. It works fine. I did have to do a soft reboot after initial power up to get it to hash at 4.8 TH/s with low HW errors. |
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Yes, it works in America. However, you need access to 208 to 240 Volts instead of 120 Volts. This would be a 2 poll breaker in the Main Service Panel and a minimum of 20 amps with 12 AWG wiring. If 2 poll 30 amp breaker, you need 10 AWG wiring. I don't think you are going higher than 30 Amps if you are installing a 240 volt outlet for the BMT 1600 watt PSU if you are in your home. I would suspect if you were in a data center, you would not have asked this question. 240 Volts is the way to go. You can run twice as many rigs than you can with 120 Volts. If you don't know what you're doing with electricity, get some help locally. That's right dmwardjr, I would have not given second thought about power calculation if I would have been purchase Colocation space. So that mean, I will have to arrange electrician to do that power adjustment if I was to use S7 and APW3-12-1600 PSU at my home? What if I buy this type of PSU http://www.frys.com/product/6806106?site=sr:SEARCH:MAIN_RSLT_PG then sure I don't need to do any changes above. Right? Thanks Again I would use one with more than 1200 watts. The S7 is rated at 1210 watts @ 600 MHz. You would have to under clock it for this PSU. Also, I would be concerned about the voltage provided by this PSU. I think you're better off getting an EVGA 1600 Supernova. After the 90 Day warranty, you might want to over clock your rig. You would be able to over clock it with the extra wattage provided by the EVGA 1600. For instance, if the Difficulty increased 8% in one month and the price of bitcoin increased 4% in the same month; [To avoid losing revenue] you could increase your hash rate by 4% by over clocking to generate the same amount of revenue that you were previously before the increase in difficulty that was not offset by the same amount of increase in bitcoin price. That was only an example. |
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