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Power supply solution for 3 x pcie cables

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I_R0M_I
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2020/09/29 03:44:41 (permalink)
Hi,

I, like many, am awaiting my ftw Ultra.

Currently running a 1080ti ftw, with 2 8 pin pcie cables direct from the psu. Trying to figure the best option to get a 3rd for the 3080.

I have an old Corsair Hx1000, the only spare cables I can find are 2 6 pin pcie cables, and a sata.

I'm thinking either a 6 to 8 pin adapter, this way it has 3 separate cables from psu.
Or an 8 pin splitter, but this way it has only 2 dedicwcabkes from psu.
I don't think there is anyway to link 2 6 pin supplies into an 8 pin? As this would in theory provide the 150w (75 x 2) of a normal 8 pin.

I'm open to any other suggestions (other than buying a new psu). I've looked for a modular cable to fit, but seems a bit of a minefield that it will be pinned the same as my psu. Even on corsair list multiple types, and my psu is old! But it's never slipped a beat, so not looking to replace it.

I'm probably getting too caught up in it. My understanding is the pcie can provide 75watts, each 8 pin can provide 150watts, and a 6 pin is another 75watts.

Thanks
#1

16 Replies Related Threads

    chumeniuk
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    Re: Power supply solution for 3 x pcie cables 2020/09/29 03:58:18 (permalink)
    I'd have to double check, but many of the cards have a dual 6-pin to 8-pin adapter.  I know the Zotac 2080 Ti that I replaced came with a pair of dual 6-pin to single 8-pin adapters.
     
    Not sure how old your PSU is, but also make sure that the 12V rail can supply the 1000 watts and not limited.
    #2
    I_R0M_I
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    Re: Power supply solution for 3 x pcie cables 2020/09/29 04:36:12 (permalink)
    Do you mean it takes 2 6 pin connectors, and turns it into 1 8 pin? Or the standard takes 2 6 pin into 2 8 pin?
    #3
    Hoggle
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    Re: Power supply solution for 3 x pcie cables 2020/09/29 04:49:04 (permalink)
    Keep in mind most PCI-E cables have two connectors. While it's best to use separate cables when possible it's not required so you should be good.

    Use an Associates Code & SAVE 5% - 10% on your purchase. Just click on the associates banner to save, or enter the associates code at checkout on your next purchase. If you choose to use my code I want to personally say "Thank You" for using it. 
     
     
    #4
    TeslaDev
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    Re: Power supply solution for 3 x pcie cables 2020/09/29 05:03:01 (permalink)
    https://store.cablemod.com/configurator/
     
    Can get a bit pricey if you do a custom cable.  A basic 8-pin replacement is probably under $15...but the shipping is expensive due to shipping from China.
     
    https://www.corsair.com/us/en/Categories/Products/Accessories-%7C-Parts/PC-Components/Power-Supplies/Type-3-Sleeved-Black-PCIe-Cable/p/CP-8920111
     
    Or hit notify on this and wait for it to come back in stock.
     
    Apologies - yeah, these wouldn't work with yours.
    post edited by TeslaDev - 2020/09/29 08:15:19
    #5
    I_R0M_I
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    Re: Power supply solution for 3 x pcie cables 2020/09/29 06:52:51 (permalink)
    Thanks for the links. Was un aware Corsair sold them separately.

    My only worry, is they don't actually list any for my psu. I'm assuming mine will come under 'original hx' as its really quite old. So it's in stock in the UK, but worried it won't work, or will damage something. I'm assuming if it did fit, they would list it.



    I have found an adapter in my 1080ti box though. So thanks for that suggestion chumeniuk.

    I'd like a new dedicated cable of I can, as it's just less cable to hide. But at least I have something that can work.

    One last question, assuming I go with the 2 cables I currently have.
    Rail 2 is 500w, just has the 2 8 pin pcie on it.
    Rail 1 is 500w, has ATX and EPS on it.
    Was going to plug my 2 cables, into rail 1, guessing the board amd cpu will never draw anywhere near 500w, allowing plenty spare for gpu. Rather than all of it on the 1 rail?
    #6
    R3L3NTL3SS
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    Re: Power supply solution for 3 x pcie cables 2020/09/29 06:56:50 (permalink)
    EVGA Supernova has 2X 8 pin and 1X 6+2 pin.
    #7
    t19922006
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    Re: Power supply solution for 3 x pcie cables 2020/09/29 07:02:07 (permalink)
    take a photo of your HX1000 modular
    like this

    #8
    t19922006
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    Re: Power supply solution for 3 x pcie cables 2020/09/29 07:05:25 (permalink)
    Your old HX 1000 is this?
    according to this video and page the PSU provide 4x 8 pin PCI-E and 2x 6 pin PCI-E
    youtu.be/GuCogPvd-jM?t=277
    www.jonnyguru.com/blog/2008/05/12/corsair-hx1000-power-supply



     
    post edited by t19922006 - 2020/09/29 07:24:22
    #9
    I_R0M_I
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    Re: Power supply solution for 3 x pcie cables 2020/09/29 07:13:28 (permalink)
    That's the one yeah.
     
    The only cables i can find, are the 2 6 pin PCIe, and a Sata. So any others must have got lost over the years. 
    post edited by I_R0M_I - 2020/09/29 07:43:22
    #10
    TeslaDev
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    Re: Power supply solution for 3 x pcie cables 2020/09/29 08:13:38 (permalink)
    I_R0M_I
    Thanks for the links. Was un aware Corsair sold them separately.

    My only worry, is they don't actually list any for my psu. I'm assuming mine will come under 'original hx' as its really quite old. So it's in stock in the UK, but worried it won't work, or will damage something. I'm assuming if it did fit, they would list it.

    Apologies.  You are correct.  According to this: https://www.corsair.com/us/en/psu-cable-compatibility
     
    You would need a different cable.
    #11
    creekthagray
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    Re: Power supply solution for 3 x pcie cables 2020/09/29 08:24:57 (permalink)
    I_R0M_I
    Hi,

    I, like many, am awaiting my ftw Ultra.

    Currently running a 1080ti ftw, with 2 8 pin pcie cables direct from the psu. Trying to figure the best option to get a 3rd for the 3080.

    I have an old Corsair Hx1000, the only spare cables I can find are 2 6 pin pcie cables, and a sata.

    I'm thinking either a 6 to 8 pin adapter, this way it has 3 separate cables from psu.
    Or an 8 pin splitter, but this way it has only 2 dedicwcabkes from psu.
    I don't think there is anyway to link 2 6 pin supplies into an 8 pin? As this would in theory provide the 150w (75 x 2) of a normal 8 pin.

    I'm open to any other suggestions (other than buying a new psu). I've looked for a modular cable to fit, but seems a bit of a minefield that it will be pinned the same as my psu. Even on corsair list multiple types, and my psu is old! But it's never slipped a beat, so not looking to replace it.

    I'm probably getting too caught up in it. My understanding is the pcie can provide 75watts, each 8 pin can provide 150watts, and a 6 pin is another 75watts.

    Thanks

    Try contacting Cable mods directly and see if they can make one direct for you as the hx1000w is no listed.
    #12
    LFaWolf
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    Re: Power supply solution for 3 x pcie cables 2020/09/29 09:16:42 (permalink)
    You could use something like this and it should be okay - https://www.newegg.com/p/N82E16812198032
     
     

    My Affiliate Code: WF7SIE2ZR9


    #13
    Jonci025
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    Re: Power supply solution for 3 x pcie cables 2020/09/29 09:43:02 (permalink)
    The compatability chart has
    "The only difference between Type 3 and Type 4 cables is the pinout of the 24-pin ATX cable; all other cables (SATA, PCIe, etc) are the same.
     
    The hx series takes either the type 3 or type 4 PCIE cables you can get a pack of 2 from SCAN for just under £19.99+p&p,  choose a colour. 
     
    scan.co.uk/search?q=corsair+type+4
    post edited by Jonci025 - 2020/09/29 09:48:34
    #14
    HeavyHemi
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    Re: Power supply solution for 3 x pcie cables 2020/09/29 09:50:12 (permalink)
    I_R0M_I
    Hi,

    I, like many, am awaiting my ftw Ultra.

    Currently running a 1080ti ftw, with 2 8 pin pcie cables direct from the psu. Trying to figure the best option to get a 3rd for the 3080.

    I have an old Corsair Hx1000, the only spare cables I can find are 2 6 pin pcie cables, and a sata.

    I'm thinking either a 6 to 8 pin adapter, this way it has 3 separate cables from psu.
    Or an 8 pin splitter, but this way it has only 2 dedicwcabkes from psu.
    I don't think there is anyway to link 2 6 pin supplies into an 8 pin? As this would in theory provide the 150w (75 x 2) of a normal 8 pin.

    I'm open to any other suggestions (other than buying a new psu). I've looked for a modular cable to fit, but seems a bit of a minefield that it will be pinned the same as my psu. Even on corsair list multiple types, and my psu is old! But it's never slipped a beat, so not looking to replace it.

    I'm probably getting too caught up in it. My understanding is the pcie can provide 75watts, each 8 pin can provide 150watts, and a 6 pin is another 75watts.

    Thanks

    Considering the age of the PSU and the fact that the PSU is internally two separate 500 watt power supplies, one for each rail...I'd buy a new one. (despite what you said) They never skip a beat, until they do.  I do not know why, if you're spending that much on a GPU, you would use a substandard PSU. (it is nothing personal, I have a HX1000, probably still works fine. However, the dual 500 watt construction, was causing issues with balancing the load with SLI).
    post edited by HeavyHemi - 2020/09/29 09:53:08

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    #15
    I_R0M_I
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    Re: Power supply solution for 3 x pcie cables 2020/09/29 10:32:50 (permalink)
    HeavyHemi
    Considering the age of the PSU and the fact that the PSU is internally two separate 500 watt power supplies, one for each rail...I'd buy a new one. (despite what you said) They never skip a beat, until they do.  I do not know why, if you're spending that much on a GPU, you would use a substandard PSU. (it is nothing personal, I have a HX1000, probably still works fine. However, the dual 500 watt construction, was causing issues with balancing the load with SLI).


    I'll build a new pc next year probably, when Intel support PCIe4.
    I get what you're saying, but it's a slippery slope isn't it. Buying an £800 gpu wasn't even planned really, just got carried away in the hype!

    I mean the TDP of the card on evga site is 320w vs 280w of my current 1080ti ftw. Obviously if I get any issues, I'll have to get a new psu. I just don't want to unless I have no choice. I honestly think a dedicated 500w rail is going to be fine. Unless the card is going to draw 40% more power than advertised!
    #16
    I_R0M_I
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    Re: Power supply solution for 3 x pcie cables 2020/09/29 10:34:31 (permalink)
    Jonci025
    The compatability chart has
    "The only difference between Type 3 and Type 4 cables is the pinout of the 24-pin ATX cable; all other cables (SATA, PCIe, etc) are the same.
     
    The hx series takes either the type 3 or type 4 PCIE cables you can get a pack of 2 from SCAN for just under £19.99+p&p,  choose a colour. 
     
    scan.co.uk/search?q=corsair+type+4


    The chart shows the 'original hx' near the bottom, with no dots anywhere for PCIe though? I'm reading it as the cables will fit the psu that has the corresponding dots.
    #17
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