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Using a 20+4 pin connector with a 24 Pin Motherboard

By bobgreen5s
Nov 13, 2006
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  1. I just started building a new system by buying all new parts except using my old power supply. I realized that my old powersupply (Forton - http://www.newegg.com/Product/Product.asp?Item=N82E16817104952) only had a 20+4 pin connector instead of the 24 pin atx connector that my motherboard uses. I was wondering if I could combine the 20 pin and 4 pin connectors and plug them into the 24 pin socket, without causing any damage or malfunction.

    Any help would be appreciated.
  2. Rik

    Rik Banned Posts: 4,985

    I'm faily sure that that wont work!! You can however buy an adapter to do the job!!!!
  3. jtickner1

    jtickner1 TechSpot Chancellor Posts: 663

    hi, my psu is the same but in my mobos manual says just plug in the 20 pin cable and align correctly. i have been running mine like this for about a month now with no troubles
  4. bobgreen5s

    bobgreen5s TS Rookie Topic Starter Posts: 42

    How would I go about aligning it correctly? Theres no labling on 20+4 pin plugs although I think they only fit in 1 way
  5. N3051M

    N3051M TS Rookie Posts: 2,800

    that is correct, the pins/plugs all align in one way and only fit in whatever connector its supposed to be on.
  6. jtickner1

    jtickner1 TechSpot Chancellor Posts: 663

    mine just says align it to the right side of the port
  7. Samstoned

    Samstoned TechSpot Paladin Posts: 2,582

    power connector could have a keyed hole that will only go with hole on MB and mine aligns to the left
    IE the clip that hold it to connnetor goes to clip but to the left ,will not plug in to the right
    if your new board uses 24 pin like a server get an adapter ,before you fry it
    those pins on the end are not for power they are for off ,on at least on my board they are
    good luck
  8. dmill89

    dmill89 TS Guru Posts: 737


    That will work perfectly fine. That PSU has a 20+4 pin connector which has 4 pins ( with orenge,red,yellow,black wires) that snap off to form a 20 pin or snap back in to form a 24-pin connector. As long as your new motherboard also uses the 4-pin (2 yellow,2 black wires) CPU connector as well and not one of the 6 or 8 pin cpu connectors.
  9. Grafficks

    Grafficks TS Rookie Posts: 454

    The reply dmill89 posted is the answer you're looking for. 20+4 means there's a detatchable 4-pin connector from the 20-pin, plain and simple.

    It is indeed possible to run a PC using a 20-pin power supply connector with a 24-pin motherboard. My 24-pin motherboard is compatible with 20-pin power supplies. I've tried it, it works perfectly, it just leaves four exposed pins on the motherboard connector (the side that the 20-pin connector isn't occupying).

    Most of all connectors within a PC will only fit in one way, so unless you shove it in real hard, it's impossible to plug it in the wrong way. :)
  10. bobgreen5s

    bobgreen5s TS Rookie Topic Starter Posts: 42

    ok thanks for all the replies, my computer seems to be working fine (so far) :)
  11. ryanusky

    ryanusky TS Rookie

    so close...

    This sounds agonizingly like a problem I'm having. My motherboard has a 24-pin "ATXPWR1" slot and an 8-pin "ATX12V1" slot (next to the CPU). My PSU has a 20+4 connector that I was originally plugging in as a 24-pin connector and leaving the 12V slot empty, and my machine hangs during boot saying "Check CPU core voltage."

    From what I have gathered on other forums, I need to plug the 4-pin into the 8-pin 12V slot? Unfortunately the 20+4 cable from my PSU will not let me stretch the 4 pins over to the 12V slot...

    if someone could confirm that any of this is correct or incorrect that would be AWESOME. Thanks!
     
  12. belkin

    belkin TS Rookie

    ive had my old system like that for a long time, its been fine.
  13. ryanusky

    ryanusky TS Rookie

    resolved

    So I just wasn't powering my CPU... rookie mistake. Leaving the 20+4 in the 24 slot was fine.

    After that I had another problem (machine rebooting every 2 seconds) that was resolved by clearing my CMOS, but now everything's working. Thanks!
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