Building Cheap Miners : My "Secret" - page 48.

miner024

newbie

Activity: 1

Merit: 0

Quote from: sundownz on June 07, 2017, 09:49:56 AM

In any event... there is a "secret" to these things... the power supply plug on the motherboard is "EPS" and an ATX supply will NOT work.

So what you do... is buy a PSU extension cable and modify it like so:

https://plus.google.com/photos/111388964237560787781/album/5362166283613539361/5366587361195860994

** -- This is NOT my data but it is what I found when doing my research.

Hey, really intrigued buy your guide and wanted to pull the trigger on a z400 with 4 gtx 1060s for my first system. I've only built a computer once before and this part is the only thing thats giving me some trouble. Is there any guide you can link showing how this is done and why its needed? Don't these refab computers you linked come assembled? why would they give you a power supply that doesn't work with the motherboard? Also any chance you could make a short guide on onboxing and connecting the gpus and innitial start up? understand if its to much work but I'd be willing to send you a xmr donation once I'm mining if you can help understand this better. thanks

sundownz

hero member

Activity: 714

Merit: 512

Quote from: ptc2004 on July 27, 2017, 03:43:50 AM

Quote from: sundownz on July 19, 2017, 10:04:38 AM

My first two racks of dedicated machines are full... with these plus the others scattered around the office / at home I have 101 total GPUs online.

I've swapped cards in a few of the systems earlier to reduce the amount of AMD cards I am running... it's likely I will swap almost all of the AMD cards to GTX 1060s or 1080s.

http://sundownaudio.com/BITCOIN%20PICS/0719171041_resized.jpg

That's a really "hot" rig

Regarding temperature I actually have three heat extractor fans in the ceiling of that corridor in the building + one fan blowing across the left rack (I have a second one to blow across the right rack when I get some time to put it up).

It'll be nice in the winter time to keep that area warm, haha!

sundownz

hero member

Activity: 714

Merit: 512

Quote from: cashen on July 26, 2017, 06:50:01 PM

Quote from: sundownz on July 26, 2017, 04:46:30 PM

Also seems that "Keccak" is a real winner on my GTX-1080 machines --they have been sticking to it pretty much all day since the update to Nice Hash enabling it.

Alot of people seem to have avoided the standard 1080 like the plague... but I've been pretty satisfied with mine.

what are you getting per GPU? I see it only making $25 per day for 8 cards.

It has varied quite a bit -- for the first few hours it was around 4-5 dollars per card / day. As of now my 1080 machines have gone back to other algos that are running 2-2.50 per day or so.

I suppose time will tell if Keccak goes back to the higher figures =)

sundownz

hero member

Activity: 714

Merit: 512

Quote from: spyder09 on July 26, 2017, 06:35:58 PM

Quote from: sundownz on July 26, 2017, 04:46:30 PM

Also seems that "Keccak" is a real winner on my GTX-1080 machines --they have been sticking to it pretty much all day since the update to Nice Hash enabling it.

Alot of people seem to have avoided the standard 1080 like the plague... but I've been pretty satisfied with mine.

so your go to machine is the T5500 hopefully getting the 875 or 750w factory power supplies from dell, using sata to 6+2 pin connectors and risers and 1060s, 1070s, or 1080s correct? This setup looks awesome I just have a question about the power did you install a power distribution unit kit or all separate receptacles by my calculations if each rig is pulling 600 watts you could put 4 on a 20a breaker or 5 on a 30 to give some headroom? I have a couple rigs setup using the 1200 evga platinum and looking at new housing for the other RX cards I have and these look like good ideas

I have used a few of the Dell T5500s -- dollar for dollar they are an awesome value. The ones I am using are all 4x GTX-1060 so I use 2x factory 6-pin + a CPU Power to dual PCI-Express power adapter. They also have the 875-watt PSU.

My actual go-to is the HP Z400 -- although I have to change the PSU I actually prefer the internal layout (more open).

As for the power -- I am running 8x 20-amp circuits at the moment. I have each system tuned to be 500-550 watts. I am trying to keep it down to 3 per 20-amp circuit for plenty of headroom.

ptc2004

newbie

Activity: 17

Merit: 0

Quote from: sundownz on July 19, 2017, 10:04:38 AM

My first two racks of dedicated machines are full... with these plus the others scattered around the office / at home I have 101 total GPUs online.

I've swapped cards in a few of the systems earlier to reduce the amount of AMD cards I am running... it's likely I will swap almost all of the AMD cards to GTX 1060s or 1080s.

http://sundownaudio.com/BITCOIN%20PICS/0719171041_resized.jpg

That's a really "hot" rig

Storx

full member

Activity: 322

Merit: 233

Quote from: spyder09 on July 26, 2017, 06:35:58 PM

Quote from: sundownz on July 26, 2017, 04:46:30 PM

Also seems that "Keccak" is a real winner on my GTX-1080 machines --they have been sticking to it pretty much all day since the update to Nice Hash enabling it.

Alot of people seem to have avoided the standard 1080 like the plague... but I've been pretty satisfied with mine.

so your go to machine is the T5500 hopefully getting the 875 or 750w factory power supplies from dell, using sata to 6+2 pin connectors and risers and 1060s, 1070s, or 1080s correct? This setup looks awesome I just have a question about the power did you install a power distribution unit kit or all separate receptacles by my calculations if each rig is pulling 600 watts you could put 4 on a 20a breaker or 5 on a 30 to give some headroom? I have a couple rigs setup using the 1200 evga platinum and looking at new housing for the other RX cards I have and these look like good ideas

When shopping the earlier generation T5500 machines look at the xeon processor, the older gen versions when rehabbed are only approved for 550watt psu's in them from dell... so if you buy them i would recommend getting the earlier of the 3 model cpu options they come in.

cashen

sr. member

Activity: 434

Merit: 251

Quote from: sundownz on July 26, 2017, 04:46:30 PM

Also seems that "Keccak" is a real winner on my GTX-1080 machines --they have been sticking to it pretty much all day since the update to Nice Hash enabling it.

Alot of people seem to have avoided the standard 1080 like the plague... but I've been pretty satisfied with mine.

what are you getting per GPU? I see it only making $25 per day for 8 cards.

spyder09

member

Activity: 60

Merit: 10

Quote from: sundownz on July 26, 2017, 04:46:30 PM

Also seems that "Keccak" is a real winner on my GTX-1080 machines --they have been sticking to it pretty much all day since the update to Nice Hash enabling it.

Alot of people seem to have avoided the standard 1080 like the plague... but I've been pretty satisfied with mine.

so your go to machine is the T5500 hopefully getting the 875 or 750w factory power supplies from dell, using sata to 6+2 pin connectors and risers and 1060s, 1070s, or 1080s correct? This setup looks awesome I just have a question about the power did you install a power distribution unit kit or all separate receptacles by my calculations if each rig is pulling 600 watts you could put 4 on a 20a breaker or 5 on a 30 to give some headroom? I have a couple rigs setup using the 1200 evga platinum and looking at new housing for the other RX cards I have and these look like good ideas

sundownz

hero member

Activity: 714

Merit: 512

Also seems that "Keccak" is a real winner on my GTX-1080 machines --they have been sticking to it pretty much all day since the update to Nice Hash enabling it.

Alot of people seem to have avoided the standard 1080 like the plague... but I've been pretty satisfied with mine.

sundownz

hero member

Activity: 714

Merit: 512

NiceHash added "Keccak" to their new updated client. My nVidia cards are doing awesome on it -- my remaining AMD cards... not so much.

My pay-rate has been a roller-coaster since then, haha... but largely in a good way (the really sharp dip is where I briefly shut down my network switch to install a new UPS on it):

sundownz

hero member

Activity: 714

Merit: 512

Quote from: Storx on July 19, 2017, 09:46:03 PM

Quote from: sundownz on July 19, 2017, 10:04:38 AM

My first two racks of dedicated machines are full... with these plus the others scattered around the office / at home I have 101 total GPUs online.

I've swapped cards in a few of the systems earlier to reduce the amount of AMD cards I am running... it's likely I will swap almost all of the AMD cards to GTX 1060s or 1080s.

Are you running 3 GPU's per rig? i was looking at your picture it looked like you had 1 gpu in the system and 2 outside on what appears to be flooring planks?

Question for you on the power, how come your using the internal PSU over external PSU on the GPU's? I ask because the system has a very low quality PSU in my understandings that wastes away like 20% of energy as heat above 50% load.... i have been running mine all on external server PSU's because of this issue to try to cut electricity cost.

For RX480/580, GTX1070, and GTX1080 I am running 3 per rig. For GTX1060 (and my single RX560 system) I am running 4 per rig.

I have replaced all the PSUs in everything other than the Dell's with 750-watt Platinum PSUs (using factory 875-watt Silver PSU in the Dells) -- they are still very efficient at the load range I use them at (I keep them in the low 500s range [adjusted with a Kill-A-Watt] where they test 90% even when hot):

http://www.anandtech.com/show/9928/the-rosewill-quark-series-psu-review/4

Basically I want each system to be a completely independent and usable system so I am sticking with standard hardware.

Also if one system has a problem I'd rather it be completely separate from the others so it doesn't take down other systems with it.

Not that the server PSUs are a bad idea by any means -- just not what I wanted to do.

Storx

full member

Activity: 322

Merit: 233

Quote from: sundownz on July 19, 2017, 10:04:38 AM

My first two racks of dedicated machines are full... with these plus the others scattered around the office / at home I have 101 total GPUs online.

I've swapped cards in a few of the systems earlier to reduce the amount of AMD cards I am running... it's likely I will swap almost all of the AMD cards to GTX 1060s or 1080s.

Are you running 3 GPU's per rig? i was looking at your picture it looked like you had 1 gpu in the system and 2 outside on what appears to be flooring planks?

Question for you on the power, how come your using the internal PSU over external PSU on the GPU's? I ask because the system has a very low quality PSU in my understandings that wastes away like 20% of energy as heat above 50% load.... i have been running mine all on external server PSU's because of this issue to try to cut electricity cost.

sundownz

hero member

Activity: 714

Merit: 512

My first two racks of dedicated machines are full... with these plus the others scattered around the office / at home I have 101 total GPUs online.

I've swapped cards in a few of the systems earlier to reduce the amount of AMD cards I am running... it's likely I will swap almost all of the AMD cards to GTX 1060s or 1080s.

sundownz

hero member

Activity: 714

Merit: 512

Quote from: rs1x on July 18, 2017, 07:38:48 PM

I ended up grabbing a Z400 from Ebay with no OS. Grabbed a $20 win10 license from softwareswap. So I have $100 in this bad boy and running great. A tad more work but about $80 less than newegg.

That's awesome =)

All of mine are running strong no issues -- extremely stable systems.

Storx

full member

Activity: 322

Merit: 233

Quote from: rs1x on July 18, 2017, 07:38:48 PM

I ended up grabbing a Z400 from Ebay with no OS. Grabbed a $20 win10 license from softwareswap. So I have $100 in this bad boy and running great. A tad more work but about $80 less than newegg.

you dont need an OS license, i run most of my machines with unactivated windows on USB stick, i found the internal HD on them were using way to much energy mining full time i dropped about 20watts off the plug switching to USB stick, plus its very simple to just mass copy the usb sticks on my main pc for future builds.....
https://www.amazon.com/PNY-Attache-Flash-Drive-P-FD64GATT03-GE/dp/B0063GKG6I/ref=sr_1_6?s=pc&rps=1&ie=UTF8&qid=1500435546&sr=1-6&keywords=64gb%2Busb%2Bdrive&refinements=p_n_size_browse-bin%3A10285016011%2Cp_85%3A2470955011%2Cp_72%3A1248879011&th=1

rs1x

full member

Activity: 284

Merit: 102

I ended up grabbing a Z400 from Ebay with no OS. Grabbed a $20 win10 license from softwareswap. So I have $100 in this bad boy and running great. A tad more work but about $80 less than newegg.

evakka

sr. member

Activity: 700

Merit: 265

Quote from: sundownz on July 14, 2017, 07:14:51 AM

Quote from: evakka on July 13, 2017, 04:12:35 PM

@sundownz
At first, congrats for your farm and also for sharing all your work.

I have a question and because your are dealing with older systems you may have an idea...
I am using an old HTPC, Scaleo E,
https://u.cubeupload.com/jonaz81a/Scaleoe2.jpg

which has 3 pcie slots and plugged in two 280x cards with powered risers.
HDD sata 170gb, ram 1,5 GB
Windows 10, claymore for zec
Virtual memory on HDD, 16gb

The cards are undervolted and in the wall plug the power is 550w.
I have changed two PSU's, a 80 certified 650w and a corsair cx750w.

The issue is that the system stays on only for 30' and then shuts down on its own without any errors

Any ideas???

This isn't good news -- but I did have one of my Dell T5500s doing that. It would shut off after anywhere from 1 to 20 hours (I returned it & Newegg refunded me).

While I did not spend the time to find the culprit it simply must be bad hardware -- probably motherboard as I changed the PSU to a spare I had to rule that out & also changed the RAM to different sticks.

Based on some speculation on Google searches I assume it may be bad capacitors on the motherboard.

Thanks for your post
I guess you are correct, this is an old motherboard and these issues can occur

sundownz

hero member

Activity: 714

Merit: 512

Quote from: evakka on July 13, 2017, 04:12:35 PM

@sundownz
At first, congrats for your farm and also for sharing all your work.

I have a question and because your are dealing with older systems you may have an idea...
I am using an old HTPC, Scaleo E,
https://u.cubeupload.com/jonaz81a/Scaleoe2.jpg

which has 3 pcie slots and plugged in two 280x cards with powered risers.
HDD sata 170gb, ram 1,5 GB
Windows 10, claymore for zec
Virtual memory on HDD, 16gb

The cards are undervolted and in the wall plug the power is 550w.
I have changed two PSU's, a 80 certified 650w and a corsair cx750w.

The issue is that the system stays on only for 30' and then shuts down on its own without any errors

Any ideas???

This isn't good news -- but I did have one of my Dell T5500s doing that. It would shut off after anywhere from 1 to 20 hours (I returned it & Newegg refunded me).

While I did not spend the time to find the culprit it simply must be bad hardware -- probably motherboard as I changed the PSU to a spare I had to rule that out & also changed the RAM to different sticks.

Based on some speculation on Google searches I assume it may be bad capacitors on the motherboard.

evakka

sr. member

Activity: 700

Merit: 265

@sundownz
At first, congrats for your farm and also for sharing all your work.

I have a question and because your are dealing with older systems you may have an idea...
I am using an old HTPC, Scaleo E,
https://u.cubeupload.com/jonaz81a/Scaleoe2.jpg

which has 3 pcie slots and plugged in two 280x cards with powered risers.
HDD sata 170gb, ram 1,5 GB
Windows 10, claymore for zec
Virtual memory on HDD, 16gb

The cards are undervolted and in the wall plug the power is 550w.
I have changed two PSU's, a 80 certified 650w and a corsair cx750w.

The issue is that the system stays on only for 30' and then shuts down on its own without any errors

Any ideas???

sundownz

hero member

Activity: 714

Merit: 512

Quote from: rs1x on July 05, 2017, 08:22:58 PM

Went back to purchase another Z400 @ Newegg and they are sold out Undecided

You may have to look around a bit to find them under a different item number:

https://www.newegg.com/Product/Product.aspx?Item=N82E16883284915&cm_re=HP_Z400-_-83-284-915-_-Product

Here is another one -- a bit more money but also a faster CPU.

I've seen the cheaper ones come in & out of stock a few times since I started buying them.

Topic: Building Cheap Miners : My "Secret" - page 48. (Read 60235 times)