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Hot!Building safest 6 GPU mining rig with GTX 1070 TI

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Cryptominer2018
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2018/01/13 16:30:18 (permalink)
Hello Folks,
If any of the following statements/questions are silly please bear with me.
 
I am for the first time, building a mining rig with following configuration:
 
6x - EVGA - GEFORCE GTX 1070Ti 8GB GDDR (dual 8 pin pcie slots) 
1x - Intel - Core i3-6100 3.7GHz Dual-Core Processor
1x - Biostar - Z270GT9 ATX LGA1151 Motherboard
1x - G.Skill - Flare X 16GB (2 x 8GB) DDR4-2400 Memory
1x - Western Digital - Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive
1x - EVGA - SuperNOVA G3 1000W 80+ Gold Certified Fully-Modular ATX Power Supply (1 MB connector, 2 CPU connectors, 5 VGA connectors, 4 SATA connectors, 1 PERF connector)
6x - 60cm PCI-E Adapter USB 3.0 1x to 16x GPU Riser 4pin+6pin+SATA
6x - PCI-Express PCIE 8 Pin to Dual 8 (6+2) Pin (power splitter)
1x - Microsoft - Windows 10 Home OEM 64-bit
1x - Fractal Design - Meshify C ATX Mid Tower Case
 
The objective is to build a safest mining rig possible so please let me know if above parts should be replaced with better parts to make the rig safe.
 
I read lots of content on the internet, read forum questions and watched ton of youtube videos, however I still havent figured out how to connect risers and GPUs to PSU. I have following questions:
1) GPU has dual 8 pin pcie slots, does that mean I need to two 8 pin connectors between one GPU and PSU? If yes then it will use up 2 VGA slots on PSU.
2) How do I connect riser to PSU unit? Do I connect one riser (using 6 pin to SATA) to SATA slot on PSU? If yes then it will use up 1 SATA slot on PSU.
3) The PSU has only 4 SATA slots and 5 VGA slots. does that mean I need 3 PSU to connect all 6 GPUs?
4) Is it safe to use power splitter to hook up 1 riser and 1 GPU to 1 splitter? The GPU has dual 8 pin slot so how would splitter work since will have 3 incoming connections (1 from riser and 2 from GPUs)?
 
There are lots of discussions on how not to use SATA connectors for risers as they are not safe. There are lots of discussions on how splitters are not safe. Therefore I am totally confused ... :(
 
Please help, if you have pictures or diagrams to illustrate set up that will be really awesome.
 
Cryptominer2018
post edited by Cryptominer2018 - 2018/01/13 16:49:05
#1

13 Replies Related Threads

    Chris21010
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    Re: Building safest 6 GPU mining rig with GTX 1070 TI 2018/01/13 21:08:22 (permalink)


    #2
    Cryptominer2018
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    Re: Building safest 6 GPU mining rig with GTX 1070 TI 2018/01/13 23:26:00 (permalink)
    Thank you Chris
     
    I had reviewed that post ealier. I need more information on how to use dual 8 pin slot for GPU (the post referenced had single 8 pin slot).
     
    Also another question I need some information on is how many PSUs I need for set of 6 (GPUS+risers), 1 Motherboard, 1 CPU? This is considering GPU and riser cables are directly connected to PSU unit. Is is recommended to have multiple PSU for same rig of (6 GPU+risers, motherboard and CPU)?
     
    Thank you in advance.
     
    Cryptominer2018
    #3
    Chris21010
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    Re: Building safest 6 GPU mining rig with GTX 1070 TI 2018/01/14 07:17:51 (permalink)
    Because you got dual 8pin cards the only way to make it work is with cable mods dual 6+2pin cables. Dual 8pin power is rated up to 375W, which is double what a 1070ti is capable of, stupid overkill design.

    As for power requirements, sum up the TDP of all the parts and divide by two or three and multiply that by 1.2 to get the safe wattage of your 2 or 3 power supplies.

    And as I said in the other thread your cpu, board, and risers should all be powered by the same power supply.
    post edited by Chris21010 - 2018/01/14 07:21:45


    #4
    NvidiaFiend
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    Re: Building safest 6 GPU mining rig with GTX 1070 TI 2018/01/18 07:02:49 (permalink)
    Less adapters the safer. If you bought 6pin risers you can use dual 6+2pin cables to power a couple risers. As Chris said cpu, board, risers all have to be the same PSU. The gpus can be on both power sources.

    Got a used >=8gb GPU that you'd like to sell? PM me
    #5
    QuintLeo
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    Re: Building safest 6 GPU mining rig with GTX 1070 TI 2018/01/20 14:23:53 (permalink)
    USB-cabled style risers do NOT transmit power from the motherboard.
    It is SAFER to put the riser and the GPU on that riser on the same power supply, because those MIGHT share power through the GPU.
    On a many-card rig it is usually a good idea to go with GPUs that use the fewest power connections possible, to avoid having to use "splitters" that can be additional points of failure.
    For the 1070 ti, that would mean going with an EVGA SC model (single 8-pin connector) instead of a EVGA FTW model (2 power connectors).
     
     It is BETTER if you can also power the motherboard from the same power supply, but it's not an absolute requirement, and if you use a multiple power supply setup (which would be overkill in general for 6 x 1070 ti cards unless you are pushing them VERY VERY hard for max hashrate) you don't have the OPTION to do so.
     For a single-power supply rig, it's not an issue at all as everything is getting powered from the same source.
     
    Using SATA in any way shape or form to power risers is HIGH RISK - the SATA power connector ITSELF is only rated for 54 watts of 12VDC while the PCI-E bus is rated to draw up to 75 *AND* the voltage-conversion circuitry on the riser that turns the 12VDC into the PCI-E bus provided voltages will ALSO eat a few watts in conversion inefficiency.
     
    It MIGHT work, if you are running the cards at a low TDP setting for high efficiency (you will HAVE to do that to run 6 of them on a single 1000 watt supply) *AND IF* the card balances the total load so the majority of the draw is via the PCI-E power connector(s) on the card - but that is NOT always the case, and there have been documented cases of GPUs pulling spikes exceeding 80 watts out of the PCI-E bus.
     Both the PCI-E 6-pin adapter and the common "MOLEX" peripheral adapter are rated for well over 100 watts and are safe to power risers from, as long as you don't overstress the WIRING (running more than 2 risers from one "Molex chain" can sometimes be an issue due to the WIRING not being sized properly to handle that much load, it's not an issue with PCI-E power unless you start splitting cables out, then it MIGHT be).
     

    I am no longer the friendly FAH competition - thank Vorsholk and his ABUSE of his Curecoin developer position for that.
     I no longer MOO due to abuses by certain "whales" in the Gridcoin community - so I now work the Distributed.net project directly again.
     
    #6
    jdw715
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    Re: Building safest 6 GPU mining rig with GTX 1070 TI 2018/01/20 23:16:15 (permalink)
    Chris21010
    Because you got dual 8pin cards the only way to make it work is with cable mods dual 6+2pin cables. Dual 8pin power is rated up to 375W, which is double what a 1070ti is capable of, stupid overkill design.





    Can dual 8pin cards run off of one 8pin cable if not overclocked?


    #7
    QuintLeo
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    Re: Building safest 6 GPU mining rig with GTX 1070 TI 2018/01/21 00:44:25 (permalink)
     
    Running 6 of them at low enough TDP settings to work on a 1000?
    Should be no tribble at all.
     
     
     Dual PCI-E cables I have seen have NEVER had enough space between the connectors to allow powering a PCI-E riser from the same cable as the card - in THEORY it might work on a "low profile" short card, but the length would be real iffy even then.
     

    I am no longer the friendly FAH competition - thank Vorsholk and his ABUSE of his Curecoin developer position for that.
     I no longer MOO due to abuses by certain "whales" in the Gridcoin community - so I now work the Distributed.net project directly again.
     
    #8
    Chris21010
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    Re: Building safest 6 GPU mining rig with GTX 1070 TI 2018/01/21 07:40:03 (permalink)
    jdw715
    Can dual 8pin cards run off of one 8pin cable if not overclocked?




    if i remember correctly it will not boot with only one of the two plugged in....


    #9
    QuintLeo
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    Re: Building safest 6 GPU mining rig with GTX 1070 TI 2018/01/21 11:43:54 (permalink)
    I have been told of "dual power connnector" cards that will run with only one power connnector - but I've never SEEN one.
    My selection of such cards is fairly small though - some R9 280x, R9 290, a single Vega 56, and all of my 1080 ti cards are dual power connector.
    I think one of my 1080 cards might be - MSI high-end "gaming" model.
     
    They ALL fail, and some of them give a "connect power" type error right after the BIOS bootup screen, when only one power connection is correctly hooked up - long before their TDP could possibly be set lower.
     

    I am no longer the friendly FAH competition - thank Vorsholk and his ABUSE of his Curecoin developer position for that.
     I no longer MOO due to abuses by certain "whales" in the Gridcoin community - so I now work the Distributed.net project directly again.
     
    #10
    PcInfamy
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    Re: Building safest 6 GPU mining rig with GTX 1070 TI 2018/01/31 18:08:12 (permalink)
    You'll probably want some heavy duty power supplies for 6 cards. If you're gonna go small get like 3 500w, or just one 1000w (thinking of the efficiency differences). Generally, the higher wattage a PSU has the more efficient it will be.
    post edited by PcInfamy - 2018/01/31 18:10:24
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    PcInfamy
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    Re: Building safest 6 GPU mining rig with GTX 1070 TI 2018/01/31 18:09:14 (permalink)
    Oh and as for the 8 pin, like QuintLeo, I've heard of them for some reason too, but never seen one.
     
    #12
    rogerlu88
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    Re: Building safest 6 GPU mining rig with GTX 1070 TI 2018/01/31 22:27:46 (permalink)
    I am building a mining rig using an old Xeon Workstation T3500. I comes with 4 PCIe slots.  only $60 from a local electronic recycler.
    Power Supply: 500Watt 
    Additional Power Supply 500Watt.
    OS: Windows 10.
    RAM: 10GB (just happen that it come with 10GB but 4GB should be ok)
    GPU: 4 x 1050ti
    If you can find something like this instead of buying a new mobo and everything else. This is a good start. Keep the cost low.
     
     
    #13
    QuintLeo
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    Re: Building safest 6 GPU mining rig with GTX 1070 TI 2018/02/01 12:06:30 (permalink)
    6 1070 ti cards should run COMFORTABLY on a single 1000 watt PS, if you use a TDP setting in the 102-110 range (most efficient range).
    I run 5 of them AND a rather power-hungry AMD 8xxx series CPU setup on a single 850 with plenty of headroom on the PS - and 700 watts (give or take 20) power draw AT THE WALL.
     
    Only reason I use the AMD setup is that it's leftover parts from my Folding days, and the extra power draw of the 8xxx CPU is made up for by having it mine Monero.
     
    Efficiency of a power supply is NOT related to it's wattage capacity level - there are a lot of Titanium-level supplies at lower wattage levels then the common 1200-1300 watt Gold rated options.
    With that said, higher efficiency power supplies don't seem to exist much below the 300 watt level, and are less common under about 450.
     

    I am no longer the friendly FAH competition - thank Vorsholk and his ABUSE of his Curecoin developer position for that.
     I no longer MOO due to abuses by certain "whales" in the Gridcoin community - so I now work the Distributed.net project directly again.
     
    #14
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