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6-pin to 8 pin power?

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  • 06-01-2016 5:30pm
    #1
    MiskyBoyy
    Registered Users Posts: 8,798 ✭✭✭


    I ordered a new Sapphire R9 390 which should be arriving tomorrow. Afaik It requires 2 x 8 pin PCI-E power leads.

    My current PSU (OCZ600MXSP-UK) has 2 x 6 pin PCI-E with 1 of them doubling as an 8 pin one, so effectively I have 1 x 8 pin, 1 x 6 pin.

    I know there's adapters to make a 6 pin fit an 8 pin but the wattage may be lower. What are my options?

    Realistically I'd like to be able to use it tomorrow without having to buy a brand new PSU, would a 6 pin to 8 pin adapter work? I'd be looking to pick up in maybe pc world Waterford.


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    #2
    ED E
    Registered Users Posts: 36,167 ✭✭✭✭ED E


    A quick google says maybe. If theyre both on separate rails I think we're ok but on a shared rail it'd be pushing it.

    +3.3V@25A, +5V@25A,
    +12V1@25A, +12V2@25A, -12V@0.3A,
    +5VSB@2.5A

    That works out at 300W per 12V rail. No way its actually doing that, but even if you can get 150W out of each side thats the card covered.


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    #3
    MiskyBoyy
    Registered Users Posts: 8,798 ✭✭✭MiskyBoyy


    Does this tell you anything new?

    4-Nameplate.jpg

    Do you think I'd get away with just using the 8 pin & 6 pin or would you recommend getting a 6 pin to 8 pin adapter?

    As far as I can see the adapters 2 extra slots are just blank anyway...


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    #4
    ED E
    Registered Users Posts: 36,167 ✭✭✭✭ED E


    Ok, that says you should be good as they're stating the 12v rail can support 504W by itself, plenty for a 390 that in testing pulls 258w.


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    #5
    MiskyBoyy
    Registered Users Posts: 8,798 ✭✭✭MiskyBoyy


    Thanks for your help ED E. I'll report back tomorrow to confirm it works.


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    #6
    MiskyBoyy
    Registered Users Posts: 8,798 ✭✭✭MiskyBoyy


    Not having any joy :/


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    #7
    ED E
    Registered Users Posts: 36,167 ✭✭✭✭ED E


    MiskyBoyy wrote: »
    MongoNet here in true Boards fashion PM'ed me to tell me he had a spare adapter & I could have it it if I wanted it.

    Thanks again man, it works perfectly, can now enjoy my 390 woo :D Really appreciate it, cheers! :cool:

    Just to conclude the thread, looks like it worked?


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    #8
    MiskyBoyy
    Registered Users Posts: 8,798 ✭✭✭MiskyBoyy


    ED E wrote: »
    Just to conclude the thread, looks like it worked?

    It did yeah. Just needed the right 6 pin to 8 pin adapter like mentioned.

    Thanks for your help :)


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