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GPU Splitter Help

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alzaincom
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2020/05/23 04:37:51 (permalink)
I have EVGA gforce 1070 FTW and an HP Z840 workstation. This workstation gives 1 male 6 pin connector (see photo) so I am looking for a gpu splitter and I found one in amazon but dont know if it is ok or not. I can see one hole has different shape on both sides
 
So the GPU & PSU pins are as shown on one image & the splitter in another. can someone help if the splitter fits?
 
 

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    bob16314
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    Re: GPU Splitter Help 2020/05/23 05:52:37 (permalink)
    You really don't want to split off a 6-pin into two 8-pin connectors because a 6-pin technically is rated for 75W and 150W for an 8-pin..That would overload and probably melt something or other along the line.

    There are other adapters out there such as two 4-Pin 'Molex' to 8-pin and two SATA to 8-pin if you have those connectors free, but ideally what you want to do is put in another PSU that has the proper quantity and type of connectors and that's what you really need to do.

    Use the OuterVision Power Supply Calculator to get a good estimate of your sytem's wattage need and to see some recommended PSUs..If it takes a standard ATX PSU, there's lots to fit your need.
     
    I would never do what you have in mind there.
    post edited by bob16314 - 2020/05/23 06:01:23

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    jasoncodispoti
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    Re: GPU Splitter Help 2020/05/23 06:54:05 (permalink)
    I agree with Bob16314, seems like a fire hazard. I would take his advice and get a new PSU. 

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    alzaincom
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    Re: GPU Splitter Help 2020/05/24 05:25:06 (permalink)
    Thank you for your reply! I dont have molex connectors on that WS, not sure about the SATA/8 pin I need to check. I keep reading that it's not safe to add another PSU! I dont want to risk frying my MB. Is there a safe way of doing so without risking any components?
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    jonkrmr
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    Re: GPU Splitter Help 2020/05/24 05:48:12 (permalink)
    New power supply would not be an option for him. His PC is a HP workstation with a proprietary power supply in it. It is not a standard ATX size power supply.......

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    alzaincom
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    Re: GPU Splitter Help 2020/05/24 05:56:10 (permalink)
    jonkrmr
    New power supply would not be an option for him. His PC is a HP workstation with a proprietary power supply in it. It is not a standard ATX size power supply.......


    I received a reply at HP community suggesting to use direct 6pin to 8pin connection for two of the 1080 gpu then the 3rd 6pin will have (3) 8pin splitter to feed each gpu including the 1070. however that leaves the 1070 with one 8pin connection while it requires 2. 
     
    https://h30434.www3.hp.com/t5/Business-PCs-Workstations-and-Point-of-Sale-Systems/HP-Z840-with-3-GPUs-Power-Configuration-Help/m-p/7619501#M32584
     
    the HP Z840 comes with (3) 6pin connections. I really dont know why its 6pin!! they said to order a heavy duty $60 dollars 6pin to 8pin from them! sounds like someone left Apple & joined HP
    post edited by alzaincom - 2020/05/24 06:00:31
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    jonkrmr
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    Re: GPU Splitter Help 2020/05/24 18:43:55 (permalink)
    I don't think your power supply will handle two 1080Ti's and a 1070. Was not designed for that much power draw on the 12v rail. I believe it is a multi-rail power supply so balancing the power draw on the different 12v rails is critical for not over loading any of the 12v rails.
     
    That said, HP designed this workstation to run Nvidia Quadro & AMD FirePro workstation graphics cards and only up to a K4200 (108 watt) on Nvidia & W2100 (24 watt) on AMD both of which are low end workstation cards and the K4200 only requires 1 6-pin PCIe power connection and the W2100 does not require suplemental power at all.
     
    My opinion is that you using spliters to get the PCIe power connection you need for what you are trying to do will overload the power supply of your HP Z840 workstation causing issues and possibly damage to the components of the PC.

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    alzaincom
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    Re: GPU Splitter Help 2020/05/25 00:02:52 (permalink)
    jonkrmr
    I don't think your power supply will handle two 1080Ti's and a 1070. Was not designed for that much power draw on the 12v rail. I believe it is a multi-rail power supply so balancing the power draw on the different 12v rails is critical for not over loading any of the 12v rails.
     
    That said, HP designed this workstation to run Nvidia Quadro & AMD FirePro workstation graphics cards and only up to a K4200 (108 watt) on Nvidia & W2100 (24 watt) on AMD both of which are low end workstation cards and the K4200 only requires 1 6-pin PCIe power connection and the W2100 does not require suplemental power at all.
     
    My opinion is that you using spliters to get the PCIe power connection you need for what you are trying to do will overload the power supply of your HP Z840 workstation causing issues and possibly damage to the components of the PC.


    From what I have been informed, each of the provided three 6-pin can take up to 225w..>  675w for all. In total @ 230v the PSU max power is 1450w. I do agree that I might be stressing the PC with such load, but I dont see any big risk here! thank you for your input
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    alzaincom
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    Re: GPU Splitter Help 2020/05/25 00:25:55 (permalink)
    please find specs. from the manual:
     
    PCIe Gen3 (PCIe3) bus speeds; can support three PCIe Gen3 graphics cards in PCIe3 x16 slots  ● Up to two 300 W or three 225 W graphics cards with optional 1125 W power supply (other conƭguration restrictions may be required) NOTE: Not all graphics cards are compatible with all video transceivers and adapters. See the graphics card documentation for speciƭc details.
     
     
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