What does a gigahash farm build look like? (miner porn inside!)

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  • retherrether Member Posts: 258 ✭✭
    greenuser said:

    Will you ever make your money back?
    19" Rack mounted servers are only £75 on ebay
    £75 gets you 2KW PSU, 8 GB RAM, 300GB HD, 2x 4core 2.5ghz Processor, 2x one gigabit network card....Plus Mobo with at least 5 pci-e slots
    just put the 6 GPUs in a separate 19" case on top of each server. feed your 6 risers in two groups of three with these.


    Just two blue USB 3 cables out the back onto two pci-e slots in server. Jump the power off the server 2kwPSU to the GPU case. Server are desigend to have 2 PSUs, one is redundent so if a PSU goes down it will work on one just one. This means loads of headroom. Mine is 2kw, the opreating system, geth and fans and HHDs runing is less than 300w. Thats 1.7Kw for mining.

    If Ethereum takes off and all our internet stuff gets decentralized, these servers will get cheaper. And there are data centers full of them

    RECYCLE YOU KNOW IT MAKES SENCE

    But most of those servers don't have 6/8 pin power leads for the cards, do they?
  • bctopicsbctopics Member Posts: 333 ✭✭
    greenuser said:

    Will you ever make your money back?
    19" Rack mounted servers are only £75 on ebay
    £75 gets you 2KW PSU, 8 GB RAM, 300GB HD, 2x 4core 2.5ghz Processor, 2x one gigabit network card....Plus Mobo with at least 5 pci-e slots
    just put the 6 GPUs in a separate 19" case on top of each server. feed your 6 risers in two groups of three with these.


    Just two blue USB 3 cables out the back onto two pci-e slots in server. Jump the power off the server 2kwPSU to the GPU case. Server are desigend to have 2 PSUs, one is redundent so if a PSU goes down it will work on one just one. This means loads of headroom. Mine is 2kw, the opreating system, geth and fans and HHDs runing is less than 300w. Thats 1.7Kw for mining.

    If Ethereum takes off and all our internet stuff gets decentralized, these servers will get cheaper. And there are data centers full of them

    RECYCLE YOU KNOW IT MAKES SENCE

    What server did you find all that stuff included for 75?
  • BlinkBlink Member Posts: 16
    There is usually always a cheaper way to set up a mining rig, but from my experience, there is hands down no better way to do it then what you see here.

    Can you go with an open air rig? sure. High temps and dust destroy your GPUs and kill your resale value.

    Can you host it in your house and not a datacenter? sure. High temps and dust destroy your GPUs and kill your resale value.

    My rigs have paid for about 1/4 of themselves so far. Consider the following... I can resell all of the components on Amazon tomorrow and recoup 80% of my investment. A year from now, i'll be able to probly recoup about the same since my equipment will be in like new condition. The GPUs run in the 60c range and i have zero dust.

    These aren't bitcoin miners... resale value is part of your investment.
  • workwork Member Posts: 2,084 ✭✭✭✭
    @Blink my GPUs that have run for years on open air rigs still look "like new," and it's not hard to maintain decent temperatures. I think it's much more a question of doing more of the work yourself; or, contracting parts of it to someone else (ala, a data center).

    Some people will prefer the former, others will prefer the latter. "Tending" to rigs is kinda fun for many of us, I think.
  • Marvell9Marvell9 Member Posts: 593 ✭✭✭
    Theres always dust no matter where you are
  • greenusergreenuser 50.8862°N 4.5537°WMember Posts: 439 ✭✭
    edited May 2016
    bctopics said:


    What server did you find all that stuff included for 75?

    i used HP Proliant ML380 but.....
    There is a HP ProLiant ML370 G5 Server 2x Intel Xeon E5420 2.50GHz Quad Core / 24.0GB RAM DDR2 here for £30
    ebay auction with 15h to go. Lets see what it sells for. Ok you need to get a HHD but they are about £15 for a SAS drive that will fit.




    Yes you may have to tap off the PSU to get power for the GPUs but look
    you have 9 PCI-E slots and 2kw of 12v




  • greenusergreenuser 50.8862°N 4.5537°WMember Posts: 439 ✭✭
    edited May 2016
    @bctopics SO IT SOLD FOR £30



    So will 6 of these

    fit in this :) and alow you to add 18 GPUs?


    So you have to add PSUs and a HHD but look what you get for £30
    I paid £75 but got 600GB of HHD too. :/ I was riped,




  • blaBLAblaBLA Member Posts: 10
    it's 7 pci-e, two are pci-x and it sounds like a jet fighter taking off ;) the idle power draw is probably worth one GPU, but yeah ;)
  • greenusergreenuser 50.8862°N 4.5537°WMember Posts: 439 ✭✭
    edited May 2016
    blaBLA said:

    it's 7 pci-e, two are pci-x and it sounds like a jet fighter taking off ;) the idle power draw is probably worth one GPU, but yeah ;)

    Cold boot yes... you may need ear protectors ... Hot boot is quieter but it settles down to a reasonable level once the operating system loads. There are fan settings at BIOS. Flat out, mid and low. In the 6th generation (this is a 5G) of Proliant the cooling fans are heat sensitive and speed up and slow down with load.

    Shocking though. You could sell half the RAM (24GB) to buy a HHD

    £30 server
    £20 for a couple of SAS HHD 146GB each
    £18 for a PCI-E, 1 to 3 switch
    £15 for 3x powered risers
    £150 for 3x HD7870
    £4 4 off L7805CV - Voltage regs to give you the 5v needed to supply the Switch and the riser cards via the 4pin Molex or SATA plugs.

    Additional items, cable, 6pin PCI-e power plugs,
    4 off 4pin molex plugs
    Crimp terminals for above plugs.

    33Mh/s for £250 :) and loads of space to expand, just buy GPUs, risers, PSUs and PCI-E 1 to 3 switchs to grow the rig.

    I wish this was gonna still be a money spinner after November :'( we could have so much fun spending summer getting this old junk working.
  • toothpicktoothpick Member Posts: 2
    greenuser said:

    @bctopics SO IT SOLD FOR £30



    So will 6 of these

    fit in this :) and alow you to add 18 GPUs?


    So you have to add PSUs and a HHD but look what you get for £30
    I paid £75 but got 600GB of HHD too. :/ I was riped,




    So, where did you get those pci-e splitters? I just happen to have several of those servers laying around my house! I'm going to try both methods in this thread as I also have a hashfast sierra asic that will make a perfect case for the OPs method :) thanks for these pics guys! Ive been brainhurting all week trying to come up with something along these lines!
  • greenusergreenuser 50.8862°N 4.5537°WMember Posts: 439 ✭✭
    SEARCH "PCI-e Express 1X to 3 Port 1X Switch Multiplier HUB Riser Card" on ebay
  • rdprdp Member Posts: 4
    @Blink do you recall if you updated the BIOS? And what version of Catalyst drivers are you using?

    Your guide was excellent and I found it no problem to build the rig. However, keeping it running is a nightmare so far. I keep getting GPUs freezing up, always the 4th one that is connected, regardless if it is in the gpu3, gpu4 or gpu5 slot.

    I've swapped tons of GPUs, nothing works. If I run 5 GPUs it is relatively stable but still crashes. With 6 GPUs it crashes inside an hour every time.

    Using Ubuntu 14.04 with Catalyst 2:15.201

    I tried upgrading Catalyst (fglrx) and then ethminer completely refuses to run.

    Any ideas?
  • hvalentinohvalentino Member Posts: 105
    @Blink how much you spend on a datacenter in a month? thanks!
  • james2343james2343 Member Posts: 1
    @Blink Did you spend around 13 k $$ to configure this farm or my calculations are wrong?
  • juanmesajuanmesa Member Posts: 1
    can you tell me what cases are u used ?
  • hushabubahushabuba Member Posts: 45
    @Blink your rig is beautiful
  • luckylucky Member Posts: 3
    edited June 2016
    Have you tried the milkcrate option? They stack and everything...
    $500 for a case makes it unprofitable for most. I wish Rosewill would make these, they make ones that can handle 4GPUs for $99 (often on sale on newegg for $79)
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