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PSU Power Question

Discussion in 'Hardware' started by M_D_K, 21 Jan 2023.

  1. M_D_K

    M_D_K Modder

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    Howdy folks :),

    Just a quick one,

    I've got a Thermaltake 1200w PSU, it has 5 PCI-E 8 PIn connectors, my motherboard uses 3 of these and my GPU uses the other 2, I'm just gonna upgrade my GPU and that will need another 8pin can i use the daisy cable from one of the other cables as they split off to 2 at the ends?

    & Or are there PSUs that have 6 PCI-E 8pins on the back of them.
     
  2. Vault-Tec

    Vault-Tec Green Plastic Watering Can

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    What GPU is it?
     
  3. M_D_K

    M_D_K Modder

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    Radeon 7900XTX
     
  4. blackerthanblack

    blackerthanblack Minimodder

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    I'm confused on the PCI-e connectors used on the motherboard. Or do you mean the 8 pin motherboard connectors? The 2 are not the same (even though they can fit). The motherboard connectors will usually be split into 4+4, and GPU connectors split 6+2.
     
  5. M_D_K

    M_D_K Modder

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    I'm using a workstation motherboard it has 24-pin, 3 8-pin and 2 6-pin connectors.
     
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  6. Vault-Tec

    Vault-Tec Green Plastic Watering Can

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    I would not use piggy back cables on that, no. Does your PSU have any extra connectors for EPS etc? it might be a better idea to have a third PCIE 8 pin made.
     
  7. adidan

    adidan Guesswork is still work

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    If the PSU is anything like this
    [​IMG]

    They all look like they have the same connector in the PSU body and there's only five of them.

    I have no experience of workstation boards but if they're gobbling up three of those slots it's only two left for the GPU and that's not enough for the xtx.

    But, yeah, I'd agree with @Vault-Tec - I'd not be daisy chaining on the 7900XTX
     
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  8. The_Crapman

    The_Crapman World's worst stuntman. Lover of bit-tech

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    Ah fooey. Yeh daisy chain the 3rd one. The Thermaltake PSU cables are pretty decent, it'll be fine.
     
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  9. adidan

    adidan Guesswork is still work

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    I've always been a bit wary of daisy chaining but then I've not had a clear reason as to why tbh other than the draw on one cable.

    In that scenario is there a preference to which would be daisy chained? I would presume the third connector on the GPU rather than the first but I have no idea why.

    Or does it make no odds?
     
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  10. The_Crapman

    The_Crapman World's worst stuntman. Lover of bit-tech

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    It's more of a problem with thinner wires and cheap PSUs. Not sure which ones I'd go for, probably have to test to see if there was any difference, but it's normally pretty even.
     
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  11. M_D_K

    M_D_K Modder

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    The cables seem pretty thick gauge, I'm assuming they have the dasiy connectors for that reason but wanted to check

    my sentaments, I think it might be from the days of the old cheap PSUs with super thin wires, I can't remember the brand but one of my early pcs had a PSU that cost about £20.
     
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  12. M_D_K

    M_D_K Modder

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    This is the back of my PSU, I'm using all but 1 of the 6pin plugs with the included cables it came with,

    [​IMG]


    In for a penny in for a few pounds, Asus Rog Thor PSU ordered probably best not to cut corners :(
     
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  13. Vault-Tec

    Vault-Tec Green Plastic Watering Can

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    Yeah with what you're running I would make sure to do it all properly dude.
     

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