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i5 PSU Confusion

Discussion in 'Motherboards' started by NamelessOne, 11 Mar 2010.

  1. NamelessOne


    Joined: 11 Sep 2008

    Posts: 16

    I have been looking at some i5 motherboards for a friend's new build and I noticed all the Mobo's I find for i5's all have 24+8 ATX pins.
    However, the only PSU's I can find are 20+4's. Would it be possible to use a 20+4 for the 24+8 ATX motherboards? If not, can someone spec me a PSU to go with this?.
  2. RJC


    Joined: 29 May 2005

    Posts: 28,848

    Location: Kent

    What model is your current PSU?

    Some of the models I have below, but some will depend on rest if your spec.

    Corsair 650w
    Corsair 400w
  3. Marvin


    Joined: 27 Nov 2009

    Posts: 3,872

    Location: Maidstone, Kent

    I think you need to look at the specs more closely. The 20+4pin usually refers to the fact that the PSU is backwards compatible with older motherboards with the 20 pin design, whilst still compatable with new designs (the 4-pin splits off the 20 pin, giving either 20 pins, or 24 pins - which is what you want).

    As for the 8 pin, just make sure the PSU has an 'EPS12V 8 pin' connector.

    Here's an example: OCZ 700W PSU

    Particularly this bit:
    This means you have the 24 pin motherboard connector (the main one), and the EPS12V 8 pin connector - which is for the CPU power. Ergo, this will work.
  4. NamelessOne


    Joined: 11 Sep 2008

    Posts: 16

    Ah, overlooked those specs. I did not realise that 20+4 was just quoting backwards compatibility with older standards. Thanks for the info!

    So I assume if the specs say:
    1 x 20+4 motherboard connector
    1 x 4pin CPU connector

    then I can use both +4's to make a +8?
    Last edited: 11 Mar 2010
  5. Alex h


    Joined: 13 Jun 2009

    Posts: 5,503

    Location: Lost

    yes thats correct
  6. thingemajib

    Wise Guy

    Joined: 18 Feb 2009

    Posts: 2,466

    Location: Behind you

    close enough.

    some psu's will have an 8pin connector that splits into two fours, others will have an 8pin AND a 4 pin connector, and you just plug one in and leave the other alone.
  7. Leezy


    Joined: 9 Dec 2007

    Posts: 773

    Location: Stoke-on-Trent

    Don't mistake a CPU 8 pin (4+4) with PCIE 8 pin (full 8 or 6 + 2).

    the CPU one on mine says CPU 1 and CPU 2 on each halfs.