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Author Topic: Building Cheap Miners : My "Secret"  (Read 60195 times)
SpceGhst
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May 28, 2018, 03:41:18 PM
 #821

What hashrate would I get on CN Heavy using an Opteron 6272?  I could have swore I read it in this thread somewhere, but I can’t find it now.  Thanks!


On quad 6380s I only get about 1050 H/s.  A single 6272 I would assume would be 220H/s or so on heavy, perhaps even less.

Thank you.  I’d ran across an 8x6272 server and was wondering if it might be worth it.  I found the original thread I was referring to... somebody was getting 2000hs out of 4x6276, but that was old CN before the forks.  Was hoping to get around 3000hs out of the 8x, but guess not.

I see the system you are looking at. Be careful. That system is actually four independent dual  6272 servers in one 2U case.

https://www.ebay.com/itm/Supermicro-Server-2022TG-HIBQRF-8x-AMD-Opteron-6272-2-1-GHZ-128-CORES-128GB-RAM/202318902893

Look at the picture of the back and you will see 4 VGA ports. One on each dual  6272 server.

You can also see one of those dual  6272 server modules being pulled out in the final picture.

Yea, I knew it was a 4 node server, but if the hash was high enough I figured I could deal with it.  I can’t get the math to come out right though.  My target is 25 cents or less per MH on Heavy and unless this server was half the asking price, it doesn’t fit my criteria.

Man, you’re getting some inexpensive (not cheap) components, so I can see why you’re doing so well!
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sundownz (OP)
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May 28, 2018, 05:32:40 PM
 #822





Finally got some air-flow in the mining area of my warehouse.

5x 24" fans feeding in through existing openings... and 1x 42" fan feeding out through what used to be a window.

I may end up adding another 42" exhaust fan but I will have to knock out some block for that one.

Curious, how much power are you pulling and did you have to customize the electrical wiring of the warehouse?

I am using about 70,000 watts right now roughly.

The main supply to the warehouse was already adequate but, yes, I had to add runs from existing breaker panels AND also have an entirely new panel installed as well.

For security, your account has been locked. Email acctcomp15@theymos.e4ward.com
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May 28, 2018, 08:25:29 PM
Last edit: May 29, 2018, 10:03:12 PM by MinersRus
 #823

What hashrate would I get on CN Heavy using an Opteron 6272?  I could have swore I read it in this thread somewhere, but I can’t find it now.  Thanks!


On quad 6380s I only get about 1050 H/s.  A single 6272 I would assume would be 220H/s or so on heavy, perhaps even less.

Thank you.  I’d ran across an 8x6272 server and was wondering if it might be worth it.  I found the original thread I was referring to... somebody was getting 2000hs out of 4x6276, but that was old CN before the forks.  Was hoping to get around 3000hs out of the 8x, but guess not.

I see the system you are looking at. Be careful. That system is actually four independent dual  6272 servers in one 2U case.

https://www.ebay.com/itm/Supermicro-Server-2022TG-HIBQRF-8x-AMD-Opteron-6272-2-1-GHZ-128-CORES-128GB-RAM/202318902893

Look at the picture of the back and you will see 4 VGA ports. One on each dual  6272 server.

You can also see one of those dual  6272 server modules being pulled out in the final picture.

Yea, I knew it was a 4 node server, but if the hash was high enough I figured I could deal with it.  I can’t get the math to come out right though.  My target is 25 cents or less per MH on Heavy and unless this server was half the asking price, it doesn’t fit my criteria.

Man, you’re getting some inexpensive (not cheap) components, so I can see why you’re doing so well!


Thanks.

I am trying to keep my overall costs down yet pick up some good hardware for mining. I also tend to look for hardware that will keep (or increase) their value and that could be resold later if I had to. My hardware decisions may not get the highest hash rates but they are close and certainly I try for the best bang for the buck.

An example: I was informed by a forum member about the R815's and where to get them and that for an additional $400 + tax they would come with quad 6380's but I felt the additional 700 H/s was not worth the extra $346. Instead  I added three more GTX 750's to other systems at $116 that produce the same 700 H/s.
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June 07, 2018, 01:02:20 PM
Last edit: June 07, 2018, 07:49:15 PM by MinersRus
 #824

Almost all PSU's, as long as they aren't junk, can operate between 100v-240v.  Yes I'm currently running all those HP supplies at 240v, in fact, anything that CAN run at 240v IS.  Read my article about being electrically dense on my site to understand why I am..

Thanks for the blog post about using 240 VAC to power server mining rigs.

I have installed two 20 AMP 240 VAC circuits. Each configured as:

20 AMP BR220 breaker in electrical panel to NEMA L6-20R Twist Lock Receptacle, 12AWG wire
Spectrum Control PDU 72A-116BUHEN-01 8-Port Power Distribution Units with 16 AMP breaker for ON/OFF
Tripp Lite 20A, 12AWG (IEC-320-C19 To L6-20P) Power Cord from L6-20R Twist Lock Receptacle to PDU

The question I have concerns the maximum current I can draw from the PDU. Does the same derating (80% of max) also apply to the 16 AMP breaker in the PDU?

The sound logic in the article shows that 80% of 20 AMPS is 16 Max AMPS for the main panel breaker. Which was why the choice of a 16 AMP PDU was optimal however if the 16 AMP breaker in the PDU also has to be derated by 80% that would put the max current at 12.8 AMPS.

I currently have one circuit at 12.8 AMPS and the other at 9.1 AMPS.

My problem is that I have three more servers that need to be added to those circuits and that would push the current to 15.5 AMPS each.

Is it okay to do that or will the breakers on the PDUs flip off after some time when they heat up?

On your setup do you know the maximum current you are drawing on any one circuit?

I would like to know that number to determine if I have to add a third circuit.
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June 08, 2018, 07:55:42 AM
 #825

Almost all PSU's, as long as they aren't junk, can operate between 100v-240v.  Yes I'm currently running all those HP supplies at 240v, in fact, anything that CAN run at 240v IS.  Read my article about being electrically dense on my site to understand why I am..

Thanks for the blog post about using 240 VAC to power server mining rigs.

I have installed two 20 AMP 240 VAC circuits. Each configured as:

20 AMP BR220 breaker in electrical panel to NEMA L6-20R Twist Lock Receptacle, 12AWG wire
Spectrum Control PDU 72A-116BUHEN-01 8-Port Power Distribution Units with 16 AMP breaker for ON/OFF
Tripp Lite 20A, 12AWG (IEC-320-C19 To L6-20P) Power Cord from L6-20R Twist Lock Receptacle to PDU

The question I have concerns the maximum current I can draw from the PDU. Does the same derating (80% of max) also apply to the 16 AMP breaker in the PDU?

The sound logic in the article shows that 80% of 20 AMPS is 16 Max AMPS for the main panel breaker. Which was why the choice of a 16 AMP PDU was optimal however if the 16 AMP breaker in the PDU also has to be derated by 80% that would put the max current at 12.8 AMPS.

I currently have one circuit at 12.8 AMPS and the other at 9.1 AMPS.

My problem is that I have three more servers that need to be added to those circuits and that would push the current to 15.5 AMPS each.

Is it okay to do that or will the breakers on the PDUs flip off after some time when they heat up?

On your setup do you know the maximum current you are drawing on any one circuit?

I would like to know that number to determine if I have to add a third circuit.


For 20A you don't need to use the twist lock or the PDU. You can just go straight from the breaker to a couple NEMA 6-20R. Then you can get NEMA 6-20P cables that plug directly into the outlets.

The 16A for the breaker in the PDU may already be the derated capacity. I'd recommend reading the manual to find out for sure.




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June 08, 2018, 08:42:24 PM
 #826

Almost all PSU's, as long as they aren't junk, can operate between 100v-240v.  Yes I'm currently running all those HP supplies at 240v, in fact, anything that CAN run at 240v IS.  Read my article about being electrically dense on my site to understand why I am..

Thanks for the blog post about using 240 VAC to power server mining rigs.

I have installed two 20 AMP 240 VAC circuits. Each configured as:

20 AMP BR220 breaker in electrical panel to NEMA L6-20R Twist Lock Receptacle, 12AWG wire
Spectrum Control PDU 72A-116BUHEN-01 8-Port Power Distribution Units with 16 AMP breaker for ON/OFF
Tripp Lite 20A, 12AWG (IEC-320-C19 To L6-20P) Power Cord from L6-20R Twist Lock Receptacle to PDU

The question I have concerns the maximum current I can draw from the PDU. Does the same derating (80% of max) also apply to the 16 AMP breaker in the PDU?

The sound logic in the article shows that 80% of 20 AMPS is 16 Max AMPS for the main panel breaker. Which was why the choice of a 16 AMP PDU was optimal however if the 16 AMP breaker in the PDU also has to be derated by 80% that would put the max current at 12.8 AMPS.

I currently have one circuit at 12.8 AMPS and the other at 9.1 AMPS.

My problem is that I have three more servers that need to be added to those circuits and that would push the current to 15.5 AMPS each.

Is it okay to do that or will the breakers on the PDUs flip off after some time when they heat up?

On your setup do you know the maximum current you are drawing on any one circuit?

I would like to know that number to determine if I have to add a third circuit.


For 20A you don't need to use the twist lock or the PDU. You can just go straight from the breaker to a couple NEMA 6-20R. Then you can get NEMA 6-20P cables that plug directly into the outlets.

Well I do need the PDU since I need to power five or six servers from the 240 Volt 20 AMP circuit.

As for what I have installed:

In electrical breaker panel I installed a 20 AMP BR220 breaker which is then wired using 12AWG wire to a NEMA L6-20R Twist Lock Receptacle.
Then from the L6-20R Twist Lock Receptacle I use a Tripp Lite 20A, 12AWG (IEC-320-C19 To L6-20P) Power Cord to connect to the PDU

I really like the Twist Lock Receptacle and Plug. Less likely for it to fall out or lose electrical contact.

The 16A for the breaker in the PDU may already be the derated capacity. I'd recommend reading the manual to find out for sure.

The Spectrum Control PDU 72A-116BUHEN-01 8-Port Power Distribution Units with 16 AMP breaker for ON/OFF was purchased used on eBay and came without a manual. I have searched and all I can find is basic information on it such as:

Basic 0U, 30-33” Single Phase - Single Input
72A-116BUHEN-01 Input VAC:(100-127)/(200-250), Output VAC:(100-127)/(200-250), Amps:16A, KVA:3.7,
Dimensions:30 x 3.0 x 1.5, Outlets:8 x C13, Breakers:1 x (2P 16A), Input Plug:Inlet IEC C20

Density – Electrical 102
http://www.cointainer.life/2018/02/22/density-electrical-101

I had hoped that since PharmEcis published that article and used the same configuration that he could elaborate as to what the maximum current that I can pull from a 16 AMP PDU. Without any additional information I guess I will just have to try to use about 15 AMPs and see if the PDU Breaker doesn't flip.
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June 08, 2018, 09:59:36 PM
 #827

Almost all PSU's, as long as they aren't junk, can operate between 100v-240v.  Yes I'm currently running all those HP supplies at 240v, in fact, anything that CAN run at 240v IS.  Read my article about being electrically dense on my site to understand why I am..

Thanks for the blog post about using 240 VAC to power server mining rigs.

I have installed two 20 AMP 240 VAC circuits. Each configured as:

20 AMP BR220 breaker in electrical panel to NEMA L6-20R Twist Lock Receptacle, 12AWG wire
Spectrum Control PDU 72A-116BUHEN-01 8-Port Power Distribution Units with 16 AMP breaker for ON/OFF
Tripp Lite 20A, 12AWG (IEC-320-C19 To L6-20P) Power Cord from L6-20R Twist Lock Receptacle to PDU

The question I have concerns the maximum current I can draw from the PDU. Does the same derating (80% of max) also apply to the 16 AMP breaker in the PDU?

The sound logic in the article shows that 80% of 20 AMPS is 16 Max AMPS for the main panel breaker. Which was why the choice of a 16 AMP PDU was optimal however if the 16 AMP breaker in the PDU also has to be derated by 80% that would put the max current at 12.8 AMPS.

I currently have one circuit at 12.8 AMPS and the other at 9.1 AMPS.

My problem is that I have three more servers that need to be added to those circuits and that would push the current to 15.5 AMPS each.

Is it okay to do that or will the breakers on the PDUs flip off after some time when they heat up?

On your setup do you know the maximum current you are drawing on any one circuit?

I would like to know that number to determine if I have to add a third circuit.


For 20A you don't need to use the twist lock or the PDU. You can just go straight from the breaker to a couple NEMA 6-20R. Then you can get NEMA 6-20P cables that plug directly into the outlets.

Well I do need the PDU since I need to power five or six servers from the 240 Volt 20 AMP circuit.

As for what I have installed:

In electrical breaker panel I installed a 20 AMP BR220 breaker which is then wired using 12AWG wire to a NEMA L6-20R Twist Lock Receptacle.
Then from the L6-20R Twist Lock Receptacle I use a Tripp Lite 20A, 12AWG (IEC-320-C19 To L6-20P) Power Cord to connect to the PDU

I really like the Twist Lock Receptacle and Plug. Less likely for it to fall out or lose electrical contact.

The 16A for the breaker in the PDU may already be the derated capacity. I'd recommend reading the manual to find out for sure.

The Spectrum Control PDU 72A-116BUHEN-01 8-Port Power Distribution Units with 16 AMP breaker for ON/OFF was purchased used on eBay and came without a manual. I have searched and all I can find is basic information on it such as:

Basic 0U, 30-33” Single Phase - Single Input
72A-116BUHEN-01 Input VAC:(100-127)/(200-250), Output VAC:(100-127)/(200-250), Amps:16A, KVA:3.7,
Dimensions:30 x 3.0 x 1.5, Outlets:8 x C13, Breakers:1 x (2P 16A), Input Plug:Inlet IEC C20

Density – Electrical 102
http://www.cointainer.life/2018/02/22/density-electrical-101

I had hoped that since PharmEcis published that article and used the same configuration that he could elaborate as to what the maximum current that I can pull from a 16 AMP PDU. Without any additional information I guess I will just have to try to use about 15 AMPs and see if the PDU Breaker doesn't flip.


You can put 3 duplex 240V 20A outlets on the 20A line. No problem.  For 20A you're wasting money using a PDU. It's only worth using a PDU when you're pushing 30-50A.

It sounds like it's 16A rated not 20A rated.


MinersRus
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June 08, 2018, 10:56:09 PM
 #828

Almost all PSU's, as long as they aren't junk, can operate between 100v-240v.  Yes I'm currently running all those HP supplies at 240v, in fact, anything that CAN run at 240v IS.  Read my article about being electrically dense on my site to understand why I am..

Thanks for the blog post about using 240 VAC to power server mining rigs.

I have installed two 20 AMP 240 VAC circuits. Each configured as:

20 AMP BR220 breaker in electrical panel to NEMA L6-20R Twist Lock Receptacle, 12AWG wire
Spectrum Control PDU 72A-116BUHEN-01 8-Port Power Distribution Units with 16 AMP breaker for ON/OFF
Tripp Lite 20A, 12AWG (IEC-320-C19 To L6-20P) Power Cord from L6-20R Twist Lock Receptacle to PDU

The question I have concerns the maximum current I can draw from the PDU. Does the same derating (80% of max) also apply to the 16 AMP breaker in the PDU?

The sound logic in the article shows that 80% of 20 AMPS is 16 Max AMPS for the main panel breaker. Which was why the choice of a 16 AMP PDU was optimal however if the 16 AMP breaker in the PDU also has to be derated by 80% that would put the max current at 12.8 AMPS.

I currently have one circuit at 12.8 AMPS and the other at 9.1 AMPS.

My problem is that I have three more servers that need to be added to those circuits and that would push the current to 15.5 AMPS each.

Is it okay to do that or will the breakers on the PDUs flip off after some time when they heat up?

On your setup do you know the maximum current you are drawing on any one circuit?

I would like to know that number to determine if I have to add a third circuit.


For 20A you don't need to use the twist lock or the PDU. You can just go straight from the breaker to a couple NEMA 6-20R. Then you can get NEMA 6-20P cables that plug directly into the outlets.

Well I do need the PDU since I need to power five or six servers from the 240 Volt 20 AMP circuit.

As for what I have installed:

In electrical breaker panel I installed a 20 AMP BR220 breaker which is then wired using 12AWG wire to a NEMA L6-20R Twist Lock Receptacle.
Then from the L6-20R Twist Lock Receptacle I use a Tripp Lite 20A, 12AWG (IEC-320-C19 To L6-20P) Power Cord to connect to the PDU

I really like the Twist Lock Receptacle and Plug. Less likely for it to fall out or lose electrical contact.

The 16A for the breaker in the PDU may already be the derated capacity. I'd recommend reading the manual to find out for sure.

The Spectrum Control PDU 72A-116BUHEN-01 8-Port Power Distribution Units with 16 AMP breaker for ON/OFF was purchased used on eBay and came without a manual. I have searched and all I can find is basic information on it such as:

Basic 0U, 30-33” Single Phase - Single Input
72A-116BUHEN-01 Input VAC:(100-127)/(200-250), Output VAC:(100-127)/(200-250), Amps:16A, KVA:3.7,
Dimensions:30 x 3.0 x 1.5, Outlets:8 x C13, Breakers:1 x (2P 16A), Input Plug:Inlet IEC C20

Density – Electrical 102
http://www.cointainer.life/2018/02/22/density-electrical-101

I had hoped that since PharmEcis published that article and used the same configuration that he could elaborate as to what the maximum current that I can pull from a 16 AMP PDU. Without any additional information I guess I will just have to try to use about 15 AMPs and see if the PDU Breaker doesn't flip.


You can put 3 duplex 240V 20A outlets on the 20A line. No problem.  For 20A you're wasting money using a PDU. It's only worth using a PDU when you're pushing 30-50A.

The PDUs I purchased only cost $12.50 each.

I am garage mining and putting six duplex 240V 20A outlets into a wall and then cabling them to the backs of the servers would be a cabling nightmare. I currently have eight servers up and running with two more being installed next week. I also use 240 VAC to power an 8-port KVM and a 24 port gigabit network switch. That works out to be 12 cables.

Also having the 16 AMP PDU keeps me from accidentally pulling too much current from a 20 AMP breaker in the power panel (80% rule).  
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June 10, 2018, 04:28:58 PM
Last edit: June 10, 2018, 04:47:29 PM by MinersRus
 #829



It sounds like it's 16A rated not 20A rated.



I know that the PDU is 16A. I never stated that it was 20A.

My original question, which has yet to be answered, is can the PDU run 16 Amps continuous or do I have to use the 80% rule and only run it at 12.8 Amps.

If someone here  has server room experience I would like to know an answer to that question.

EDIT: After more google searching this is the best I could find as an answer to my question:

Quote
Some of the APC PDUs I've had had circuit breakers, some haven't. If there's a breaker on it, it will be labeled with the trip value.

https://arstechnica.com/civis/viewtopic.php?f=11&t=1158437
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June 10, 2018, 07:54:25 PM
Last edit: June 10, 2018, 08:30:39 PM by senseless
 #830

I know that the PDU is 16A. I never stated that it was 20A.

My original question, which has yet to be answered, is can the PDU run 16 Amps continuous or do I have to use the 80% rule and only run it at 12.8 Amps.

If someone here  has server room experience I would like to know an answer to that question.

EDIT: After more google searching this is the best I could find as an answer to my question:

Quote
Some of the APC PDUs I've had had circuit breakers, some haven't. If there's a breaker on it, it will be labeled with the trip value.

https://arstechnica.com/civis/viewtopic.php?f=11&t=1158437


Yes, I'm aware of what you're asking. That's what I was answering, it sounds like it's 16A rated not 20A rated. If it was 16A continuous then it would obviously have to be a 20A breaker to handle that power. No?

If the breaker says 16A on it, it's probably not derated. The easiest way to tell would be to push 15A of power through it and see if it trips. If it trips, it's not derated.

To reply to some of your other points... The 6-20R/P don't come loose.. They're also like $1.50 for 2 outlets and you're using the exact same length, gauge and count of wire. The only thing that changes is you've added a couple boxes to hold the outlets.

Here's my old mine... https://bitcointalk.org/index.php?topic=873046.0
I know a little something about what i'm talking about.. Even if my name is senseless.. We had 10MW capacity and 1MW built out before the 2015 crash shut us down.

Whats more interesting to me these days are these tripp-lite units using 415/240Y. You can place a single primary voltage -> step down at multi-mw level to 415/240. From there you can use 480/277 panels to deliver insane amounts of power to your racks. These tripp-lites are hardwired. There is one caveat though, going this method increases AIC and it is recommended required you add in-line fusible disconnects to reduce AIC. The fusible disconnects can be rated above the breaker amperage so that they never blow. The fuse itself though will reduce AIC due to it's design. DO NOT DO THIS UNLESS YOU HAVE AN ELECTRICIAN WHO KNOWS WTF AIC IS AND HOW TO CALCULATE IT. THERE IS ARC FLASH POTENTIAL HERE. Most electricians haven't a clue. This a european style electrical system thats used a lot in iceland for instance. It's still 60hz (in the usa) but in EU (50hz) they have a tendency to use fusible disconnects more than they use breakers. The fusible disconnects reduce AIC and arc flash potential. By reducing the number of transformers and step downs they significantly reduce the cost of building and maintaining their electrical grid.

https://www.tripplite.com/28.8kw-3-phase-switched-pdu-240-230-220v-outlets-24-c13-6-c19-hardwire-415-400-380v-input-0u-vertical~PDU3XVSRHWB

I suspect that using these will pay for itself by reducing man hours during installation/setup. Plus, who wouldn't want API based remote reboot? -- In addition you'll save costs on various panels, sub panels, isolation transformers, wiring costs, electrician costs, etc, etc. I expect a 415/240 setup at multi-mw to cost about 50-75% of a traditional 480/277 with isolation step down.

@sundownz let me know if this is interesting to you. Happy to talk to your electrician. I really want to see one of these setup but have no use for it myself at present. You're probably getting close to filling up your transformer by now.


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June 12, 2018, 04:29:08 PM
Last edit: June 12, 2018, 04:45:20 PM by grendel25
 #831

What hashrate would I get on CN Heavy using an Opteron 6272?  I could have swore I read it in this thread somewhere, but I can’t find it now.  Thanks!


On quad 6380s I only get about 1050 H/s.  A single 6272 I would assume would be 220H/s or so on heavy, perhaps even less.

Thank you.  I’d ran across an 8x6272 server and was wondering if it might be worth it.  I found the original thread I was referring to... somebody was getting 2000hs out of 4x6276, but that was old CN before the forks.  Was hoping to get around 3000hs out of the 8x, but guess not.

I see the system you are looking at. Be careful. That system is actually four independent dual  6272 servers in one 2U case.

https://www.ebay.com/itm/Supermicro-Server-2022TG-HIBQRF-8x-AMD-Opteron-6272-2-1-GHZ-128-CORES-128GB-RAM/202318902893

Look at the picture of the back and you will see 4 VGA ports. One on each dual  6272 server.

You can also see one of those dual  6272 server modules being pulled out in the final picture.

I just got this: https://www.supermicro.com/aplus/system/2u/2022/as-2022tg-htrf.cfm  equipped with 8x Opteron 6376, 128GB ram, 4x 128GB SSD, 2x 1100/1400W (120v/240v) PSU ($1500 shipped).  Is there some problem with them being 2x Opteron per independent board?  Is the issue with the additional power overhead per board as compared to maybe having a single 4x 63XX board?  

I don't intend to mine one particular algorithm.  I bought this for the flexibility to mine new CPU exclusive algorithms so I'm not really interested in 750ti or various other GPU scenarios.

Also, I have been trying to understand how I will manage this and what the best way to mine might be.  Is it possible to link/cluster all boards and use 1 SSD?  Any thoughts on removing RAM and maybe other components to reduce the wattage footprint?

And... For now, I just have 120V power so will be limited to 1100 watts power. But there are two 1100 watts PSU so not sure how they stack or if the other is purely for redundancy.  Once I go to 240V it could be 1400 Watts PSU but that won't happen for another year+.  

Does being limited to 1100 watts limit the mining potential?  I know 115W TDP x 8 is 920 so I'm already past the 80% threshold... and then let's add in other components...

Thanks for any thoughts.  Especially thoughts on the best way to manage mining rather that be independent or clustered server management of the 4 boards in the 2022TG-HTRF unit.  

Another thought... I might consider using unused resources for other tasks such as home server or various IT training labs.  It seems like many mining options do not utilize all cores and that there could be other resources available for other less demanding tasks.  thumbs up/thumbs down?

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Kahooli
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June 12, 2018, 05:01:03 PM
 #832

That system is four independent servers with two redundant psu for all of them. You will need four hard drives and four operating systems. I recommend you learn how to use ansible and keep them all in sync.
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June 13, 2018, 04:09:18 PM
 #833

Sure, ansible seems to be the way to go and there is a lot of info widely available for that.  It even sounds like ansible can be used to manage windows servers. 

I was more interested in first-hand experience from anyone in this thread.  Like I said above... I am mostly interested in "FLEXIBILITY" to mine whatever I want to mine. 

Sometimes that means mining under Windows and sometimes that means mining under Linux.  Given the equipment I have, it looks like I would be looking to build 4 dual-boot (Linux/windows) systems and then managing them all through ansible. 

If anyone has specific links to info on similar setups, it would be great.  I've seen some configuration guides so far but I'm looking more to see what the comprehensive setup and final product looks like for managing something like this.

..EPICENTRAL .....
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sundownz (OP)
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June 20, 2018, 12:53:38 AM
 #834

How is everyone else ?

I am still building away... I've grabbed up some 1070Ti lately. And still working on getting all the other stuff I bought online -- been super slow at it.

In any event... it's getting HOT in my mining area -- it was 102 today in there.

Although, I haven't seen it more than 8 degrees over the outdoors temps so I'm going to say it's not too bad.

My building has a basement... so I want to figure out how to draw more air up from there as that air is much cooler. As of now I measure a 0.0 MPH windspeed coming up from the basement.

There are two exhaust fans down there (opposite side of the building as the mining room)… perhaps if I can reverse them to intake I can get some of that cooler air to come up and over, across the building, and into the bitcoin area (which now has intake / exhaust fans).

For security, your account has been locked. Email acctcomp15@theymos.e4ward.com
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June 20, 2018, 12:57:33 AM
 #835

I am fighting an odd issue in one of my Z400s.

It turns itself off periodically and the beep code indicates "power failure" -- four beeps.

First time I have seen this and it NOT be a power supply (changed PSU already).

So I removed two out of three 1070Ti cards -- running it on just one for at least 24 hours to see if the issues persists. Then I will add cards back one at a time if it does NOT persist on the single card.

I also re-pasted the chipset heat-sink as that seemed to be running a bit hot (just in case).

If all else fails it may be my first case of actual Z400 hardware failing (maybe motherboard).

For security, your account has been locked. Email acctcomp15@theymos.e4ward.com
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June 20, 2018, 03:41:21 PM
Last edit: June 20, 2018, 11:43:59 PM by MinersRus
 #836

I am fighting an odd issue in one of my Z400s.

It turns itself off periodically and the beep code indicates "power failure" -- four beeps.

First time I have seen this and it NOT be a power supply (changed PSU already).

So I removed two out of three 1070Ti cards -- running it on just one for at least 24 hours to see if the issues persists. Then I will add cards back one at a time if it does NOT persist on the single card.

I also re-pasted the chipset heat-sink as that seemed to be running a bit hot (just in case).

If all else fails it may be my first case of actual Z400 hardware failing (maybe motherboard).


I only have two Z400's mining with Vega 56's so my sample size is small. One Z400 with two Vega's and the other with one Vega.

During an internet outage I powered down all my miners including the Z400's. When the outage passed I powered on all miners and started them mining.

All systems came back on except for the Z400 with the single Vega. It too had the "Red Power Button" flashing and four beeps. In researching, this error is supposed to be GPU initialization failure. I tried everything (replace power supply, ran memory tests, swapped to known good GPU) and the problem persisted.

I ended up putting the Vega 56 in another system which works fine with the power supply from the failing Z400.

So the issue defiantly is with the Z400 motherboard. I ended up scrapping the Z400.
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June 21, 2018, 12:31:44 AM
 #837

*** WARNING for all Dell R815 owners ***

DO NOT flash to the latest 3.4.1 BIOS as it will probably brick your system.

I found this out the hard way.

The new 3.4.1 BIOS and other system firmware updates ISO was released 06-12-2018 and available on the DELL site so I downloaded it and burned the ISO onto a DVD and then booted from it. Updates were going smoothly when all of a sudden the monitor screen went blank. I waited for hours but all I had was a blank screen. I forcibly had to power off. When I then powered-on the fans spun up and down but no BIOS screen was ever seen either on the built in VGA port or on the GTX 750 discrete card. The front display status (when holding right button for 5 seconds) states "No Post Code".

The R815 in question had quad Opteron 6238 Engineering Samples (ZS262445TCG45) in it. It was working great on the 3.2.2 BIOS but had older other firmware in it which was my main reason for updating it. The 3.4.1 Bios Update is a Microcode Update (probably for Meltdown/Spector) and I am not sure if having the Engineering Samples in it was why it got bricked.

Needless to say I am not updating any of my other R815's.

FYI: The R815's with quad Opteron 6238 Engineering Samples hash at 1700 H/s. I have three R815 systems with them and two other R815's with quad Opteron 6234's that produce 1570 H/s. In each of these systems I have added a single GTX 750 which adds 230-240 H/s.
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June 21, 2018, 01:08:42 PM
Last edit: June 22, 2018, 07:54:17 PM by sundownz
 #838

I am fighting an odd issue in one of my Z400s.

It turns itself off periodically and the beep code indicates "power failure" -- four beeps.

First time I have seen this and it NOT be a power supply (changed PSU already).

So I removed two out of three 1070Ti cards -- running it on just one for at least 24 hours to see if the issues persists. Then I will add cards back one at a time if it does NOT persist on the single card.

I also re-pasted the chipset heat-sink as that seemed to be running a bit hot (just in case).

If all else fails it may be my first case of actual Z400 hardware failing (maybe motherboard).

I only have two Z400's mining with Vega 56's so my sample size is small. One Z400 with two Vega's and the other with one Vega.

During an internet outage I powered down all my miners including the Z400's. When the outage passed I powered on all miners and started them mining.

All systems came back on except for the Z400 with the single Vega. It too had the "Red Power Button" flashing and four beeps. In researching, this error is supposed to be GPU initialization failure. I tried everything (replace power supply, ran memory tests, swapped to known good GPU) and the problem persisted.

I ended up putting the Vega 56 in another system which works fine with the power supply from the failing Z400.

So the issue defiantly is with the Z400 motherboard. I ended up scrapping the Z400.

I tracked my issue down -- and it ended up being one of the GPUs in the system.

After some other swapping of hardware re-including that GPU would actually result in the 4-beep code immediately upon pressing power on.

So far good to go for 24 hours.

----------

UPDATE (6-22-18):

You may be right, actually, MinersRus! Another day of running and the 4-beeps repeated.

I am going to order a few spare motherboards on e-bay to keep on hand. That is the only thing left it could be.

For security, your account has been locked. Email acctcomp15@theymos.e4ward.com
MinersRus
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June 23, 2018, 04:18:03 PM
Last edit: June 23, 2018, 05:30:42 PM by MinersRus
 #839

I am fighting an odd issue in one of my Z400s.

It turns itself off periodically and the beep code indicates "power failure" -- four beeps.

First time I have seen this and it NOT be a power supply (changed PSU already).

So I removed two out of three 1070Ti cards -- running it on just one for at least 24 hours to see if the issues persists. Then I will add cards back one at a time if it does NOT persist on the single card.

I also re-pasted the chipset heat-sink as that seemed to be running a bit hot (just in case).

If all else fails it may be my first case of actual Z400 hardware failing (maybe motherboard).

I only have two Z400's mining with Vega 56's so my sample size is small. One Z400 with two Vega's and the other with one Vega.

During an internet outage I powered down all my miners including the Z400's. When the outage passed I powered on all miners and started them mining.

All systems came back on except for the Z400 with the single Vega. It too had the "Red Power Button" flashing and four beeps. In researching, this error is supposed to be GPU initialization failure. I tried everything (replace power supply, ran memory tests, swapped to known good GPU) and the problem persisted.

I ended up putting the Vega 56 in another system which works fine with the power supply from the failing Z400.

So the issue defiantly is with the Z400 motherboard. I ended up scrapping the Z400.

I tracked my issue down -- and it ended up being one of the GPUs in the system.

After some other swapping of hardware re-including that GPU would actually result in the 4-beep code immediately upon pressing power on.

So far good to go for 24 hours.

----------

UPDATE (6-22-18):

You may be right, actually, MinersRus! Another day of running and the 4-beeps repeated.

I am going to order a few spare motherboards on e-bay to keep on hand. That is the only thing left it could be.


I have seen similar issues with systems that are powered 24/7 that really aren't meant to be. If the capacitors for the on-board regulators are not of high quality then over time they swell up and sometimes even leak their guts.

I have a Windows 7 desktop computer that runs 24/7 as my home DVR. It is running the Free Windows Media Center. I have had to replace the motherboard once already because of bulging capacitors. Then the replacement motherboard began to have issues. Since I now knew the problem was capacitors I replaced the ones I found bulging which fixed the problem.

Going back to my failing Z400 the reason it failed was when it got powered down the capacitors had pressure reduced because of no power. The constant pressure then no pressure is what caused it to open up and thus lose it's value causing incorrect power on the motherboard.

Because of this issue you may need more than a few Z400 spare motherboards. If a time comes when you have to power off your Z400 miners a number of them may not power up again without issues.
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June 24, 2018, 11:41:55 AM
 #840

Great idea, thanks for sharing but if I in Vietnam, How can I buy this?
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