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    #1

    20 pin vs 24 pin PSU connector

    I have an Intel DP965LT motherboard which I recently bought and it has a 24 pin ATX connector. Only problem is that I only have a 20 pin PSU instead of a 24 pin PSU. I bought a 20+4 pin Delta made PSU for this system except the motherboard has a design flaw where the joint of the 20+4 of the PSU connector impacts onto a capacitor that sits right where the joint is.
    At the moment I am using a 20 pin Dell/ Delta PSU to power the system and so far it's been running for months without a problem.
    I even asked the store where I bought the board if using a 20 pin PSU would be OK and they said it would be fine just as long as I didn't run like a core 2 quad or something power hungry in this system. Only trouble is that I am running a P4 Prescott which is also power hungry.

    What should I do? My friend suggested getting a 20 pin to 24 pin adaptor except I've heard many people say that is not a good idea because it increases resistance and also puts more stress on the PSU because it has to power another 12V rail.

    Thanks.
    Don't find love, let love find you. That's why its called falling in love, because you don't force yourself to fall, you just fall. - Anonymous
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    #2
    Re: 20 pin vs 24 pin PSU connector

    I just opened up the tower and checked the ATX power connector and it isn't burnt or anything like that due to more current demand from the motherboard and its components due to the lack of the extra 4 pins on the ATX connector.

    Thanks.
    Don't find love, let love find you. That's why its called falling in love, because you don't force yourself to fall, you just fall. - Anonymous

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      #3
      Re: 20 pin vs 24 pin PSU connector

      why would that adaptor have to power another rail? (unless it's one that has an extra molex connector which i haven't seen in person yet.)
      if that thing put more stress on the psu your system wouldn't run in its current state.

      most probably the extra 4 pins on the mobo are in the same network as the other ones. you should be able to figure that out with a DMM.

      the extra 12V 4pin connector on modern mobos takes a lot of stress away from the conventional ATX connector anyway.

      my advice: either find a workaround for the 24pin thing or leave ot as it is.
      i assume the adaptor wouldn't change a thing (but rather add more failure points).
      "Every normal man must be tempted at times to spit on his hands, hoist the black flag, and begin slitting throats." - H.L. Mencken

      Comment

        #4
        Re: 20 pin vs 24 pin PSU connector

        24 pin was put in use to put extra voltages to divide up the load among the connections so current per pin is lower also to boost extra wattage available to board's needs.

        This was first used in server boards with multi-cpu now in consumer boards (all types including the overpriced gamer boards).

        A smart guy like me, WILL use it when I put together board and PSU with that 24 pin plug. It's Good Thing.

        Cheers, Wizard
        Last edited by Wizard; 11-12-2008, 08:24 AM.

        Comment

          #5
          Re: 20 pin vs 24 pin PSU connector

          I recently got an HP AMD dual core in here Vista equippped so it's not that old and HP used a 20 pin PSU on the 24 pin mobo!

          To add insult to inquiry it was a Bestec 250W and in addition to that it didn't even have any SATA power connectors. So what does HP do? Use Molex to SATA adapters of course!

          This really angers me it seems that HP wants to unload some old PSU stock (from what 1998?) on their customers.

          I would only use a 250W supply on a 200 mhz machine or lower .

          It also had a PCI-E X16 on it I would have loved to see the stability issues if someone ever decided to use it.

          I chucked that piece of junk and charged the customer for a decent 24 pin PSU.
          Last edited by Krankshaft; 11-12-2008, 04:48 PM.
          Elements of the past and the future combining to make something not quite as good as either.

          Comment

            #6
            Re: 20 pin vs 24 pin PSU connector

            If that's the case then I guess the 20 pin PSU will stay in there for now.

            Thanks.
            Don't find love, let love find you. That's why its called falling in love, because you don't force yourself to fall, you just fall. - Anonymous

            Comment

              #7
              Re: 20 pin vs 24 pin PSU connector

              I agree with kikkoman: I had a PSU without SATA power connector so I had to use an adapter from 4Pin Molex to SATA to supply a Maxtor 160GB SATA.
              This HD gave me problem, at least one/two days a month my system didn't recognize it.
              I changed the PS with a new one with SATA power connector and the problem disappeared. Unfortunately the PSU was an Allied and recently I replaced it with a Newton Power and this one has not SATA power connector so I came back to the adapter and guess what happen: my system start again to have problem with SATA HD.
              I use this HD just to save file, the OS is on WD 80GB PATA, so it is not a big problem but from time to time I have to restart the PC to make it working properly with SATA HD.

              I think it is not a good idea to add extra cable/junction on rails where you have a lot of current or low voltage, you add extra voltage drop.

              If the system works correctly with 20PIN connector I don't see any reason to use an adapter but if I it gave me problems, I would change the PS.

              Ciao
              Gianni
              "In the confrontation between the stream and the rock, the stream always wins...Not through strength, but through persistence."
              H. J. Brown

              Comment

                #8
                Re: 20 pin vs 24 pin PSU connector

                @ gianni: your problem with your HDD could be related to the missing 3,3V on the 4pin molex adapter (orange wire)

                Comment

                  #9
                  Re: 20 pin vs 24 pin PSU connector

                  @ Scenic: I didn't look too much at SATA power connector but you are right, on the adapter the orange cable is missing while on the SMPS cable is present.

                  I have bought some days ago a SATA/IDE to USB Adapter and also here the power connector for SATA drive has only +12V and +5V, but it doesn't give me problems.
                  Is the 3.3V necessary? If it is, why they sell such adapter?

                  By the way I find this adapter (Vantec) very help full when I have to recover data or make a back up from HD of other PC.

                  Ciao
                  Gianni
                  Last edited by Gianni; 11-16-2008, 06:31 PM. Reason: Typo
                  "In the confrontation between the stream and the rock, the stream always wins...Not through strength, but through persistence."
                  H. J. Brown

                  Comment

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