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Asus P5AD2 Premium - Bulging OSTs

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    Asus P5AD2 Premium - Bulging OSTs

    Well I'm apalled at Asus. You pay a 'premium' for this board and you get cheap caps.

    What makes it worse is I bought it used and had it shipped to me. I'm a litle peeved with the buyer. Should have been checked really but I did honestly miss it when I skimmed over it at first. Plus someone that doesnt know of this problem and also given that it is stable, the seller ran some stability benchies on it, why look for a cause with no symptoms ?

    Asus' fault too ultimately.

    Given it's age I'm certain I can have it repaired under warranty. Just thought it may be of interest here that Asus doesn't seem to get enough profit so they like to penny pinch and put cheapos on their top of the line board. Maybe they've gotten better but this really has lost any confidence I had in the quality of Asus boards.

    Looking over the board, the majority of caps are OST. I'm creating a table of caps on this board just for anyone interested and in the worst case scenario if for some reason I can't get it under warranty. Rest assured I will be kicking up a stink though if they refute it.

    A quick overview at this stage. They do have some good caps on the board, don't know why they bother though. There are some tall Chemicons. Although a look a like with poor packaging and an X rather than Y vent has me slightly worried. 2 caps that look decent but I'm not sure, they are yellow and black with a strange vent pattern, marked with an F with a line above and below. Imagine a box around an F with the left and right sides cut off.

    The rest are OST and Ltoc, yuck!

    I just don't understand Asus' logic though. Given the price for the board and it's intended market you think they'd use good quality caps. The amount saved on cheap caps must be significant enough to cover any RMA and extra support staff needed. I don't really get it though, why they bother trying to save a few cents over something that not only could cost them a lot more later on, but also damage the reliability of the product and potentially ruin customer confidence. Were those few cents worth it Asus ?

    I know I won't be buying anything Asus in future unless every single cap is of good quality. I could understand it on a cheap model, but a Premium, that's not on.

    Well enough ranting, heres a pic and a quick description in case you're blind.

    4 caps are ruptured, I'm not sure if the pic shows it as bad as they are really. Atleast a millimeter or two bulgng upwards and they are lifted off the board so bulging both at the bung and vents.

    They are blue OST, 680uF, 4V, 105C located around the CPU socket.

    I'd imagine if I can't get warranty they'll be a pain. They're so close to the fan and heatsink that I'll have to keep them at very close to the same size to avoid any fouling, of course I could put them at angles and such but there isn't a whole lot of room to play with anyway.From a look around where I can get them from only a Nichicon HE 680uF/6.3V fits the bill and that's from the US.

    Anyway that's it for now. Just thought this may be of interest.
    Attached Files
    Last edited by splaz; 07-28-2006, 09:43 AM.

    #2
    Re: Asus P5AD2 Premium - Bulging OSTs

    You wouldn't think those caps would fail without some underlying reason.
    Two possabilities come to mind, crappy power supply and higher temperature.
    Jim

    Comment


      #3
      Re: Asus P5AD2 Premium - Bulging OSTs

      OST's are a quite common one to fail. Time for a recap.
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        #4
        Re: Asus P5AD2 Premium - Bulging OSTs

        Two possabilities come to mind, crappy power supply and higher temperature.
        PSU was a PC Power and Cooling and the CPU had a waterblock on it.

        Don't think it was that.

        Well I noticed OSTs were listed here as being bad and as Topcat just said it's quite common. Plus they don't look all that good quality.

        As for a recap. As I said hopefully I can get it under warranty. Even if I do though I'd imagine they'd just put new cheapies on there or give me a replacement with cheap caps.

        So even if it is RMAed, I'll definitely recap it somewhere down the line. When it's out of warranty and more outdated most likely.

        I'm going to practice recapping on an old P2 or P3 board I have lying around. They're both working fine, no bad caps, so if I replace the caps and they don't work we'll know what caused it. Plus they don't use such small case sizes which are a PITA to get.

        Comment


          #5
          Re: Asus P5AD2 Premium - Bulging OSTs

          the CPU had a waterblock on it

          Well, there's no fan there to move the hot air away then...But that's a good brand of PSU.
          You know there's something wrong when you open up a PSU and are glad to find Teapos.
          Why I don't buy cheap cases!

          Comment


            #6
            Re: Asus P5AD2 Premium - Bulging OSTs

            Well, there's no fan there to move the hot air away then...But that's a good brand of PSU.
            True but I would thought that a waterblock would cool the CPU far better so there would be less heat in surrounding areas anyway.

            That is a point though, there still would be heat radiated to other components. As I said though I thought there would be far less given how much better cooled the CPU itself is.

            Still doesn't justify their failure even if it does get hotter. They are rated at 105C so I can't imagine it got anywhere near that.

            Comment


              #7
              Re: Asus P5AD2 Premium - Bulging OSTs

              I agree with you, those Ost caps are an very ugly choice there from Asus. If i got the picture right, these are all 820uF O/P caps. With the usuall airflow, may be they had survived longer. But for such an board, ASUS should have had an watterblock in mind.
              As due to the heat, many other similiar boards are having some polymercaps, particularely those 820uf are an very comon value for those. Probably they skimped those very expensive polymers, wich the board was probably desinged for. Not only with some may be to low rated AL caps, they used some not that good brand too.

              I would consider recaping it with some polymers, this would be the best solution on that.

              Comment


                #8
                Re: Asus P5AD2 Premium - Bulging OSTs

                No one is going to deny that OST are a crappy cap, but as for cooling...

                You have to keep in mind that caps generate their own heat while in use. Some more than others, depending on their location and values. So not only do you have to combat heat being absorbed by the caps, but being generated by another component; but also the heat generated by the caps themselves. When you remove the HSF from a processor, you may be removing the hot air from the processor, but you're also removing the cooler airflow from the caps.
                Ludicrous gibs!

                Comment


                  #9
                  Re: Asus P5AD2 Premium - Bulging OSTs

                  I wouldn't have thought the heat from caps alone could cause that. They don't even get warm on their own in small circuits I've built in the past. Of course a computer could put a cap under more strain...

                  As I said I would have considered the CPU to be the greatest source of heat, although it is a good point that the stock heatsink provides cooling to surrounding areas.

                  I'd imagine that heatsink near them may be mosfets, so that could have contributed.

                  Still ultimately the caps are rated at 105, they're cheap and they have failed in the past.

                  Plus as gonzo said Asus shouldn't rely on the stock heatsink being used to maintain some semblance of reliability in their caps.

                  I'll be testing the ESR of the bulging and not bulging caps out of interest and ringing Asus on monday.

                  Luckily I have a mate who's dad runs his own computer/electronics sales and repair business. As much as I'd like to try it myself I have a habit of wrecking things and my temp regulated iron is 320C (46W), which apparently is nowhere near enough for the job. So if they won't cover it I'll source some polymers and get it recapped.

                  edit: They're 680s gonzo. Pics not the best to go by for readings values the digital cameras not that good for close ups.
                  Last edited by splaz; 07-29-2006, 11:14 AM.

                  Comment


                    #10
                    Re: Asus P5AD2 Premium - Bulging OSTs

                    Originally posted by splaz
                    Luckily I have a mate who's dad runs his own computer/electronics sales and repair business. As much as I'd like to try it myself I have a habit of wrecking things and my temp regulated iron is 320C (46W), which apparently is nowhere near enough for the job.
                    I alternate between a 25w & 40w (DSE) iron for all my capacitor repairs, and have found them adequate... but I have to admit, I usually need to allow the iron a short period of time to 'reheat' when the going gets tough
                    Viva LA Retro!

                    Comment


                      #11
                      Re: Asus P5AD2 Premium - Bulging OSTs

                      Yeah but cheap dick smith irons get a lot hotter. I had a 25W that got insanely hot.

                      Because this is temp regualated, although I have turned it up a bit, it won't get as hot as one of those cheap irons.

                      It does have a ceramic heater so it heats up quickly but still I have had trouble with big ground planes in the past.

                      Comment


                        #12
                        Re: Asus P5AD2 Premium - Bulging OSTs

                        Well I'm getting through documenting all the caps and their positions.

                        The deal from Asus is they'll repair it but for a fee. $33AU...

                        At the moment I'm inclined to pay that. If it was much more I wouldn't bother.

                        As I said, myself or my mate's dad's repair business could do it. However the cost of caps alone would be that, let alone the possible problems. Especially given how hard it would be to get replacement caps due to the size...

                        I put on the stock heatsink to have a look and I can see how dood and other said there was a lack of cooling.

                        The stock heatsink hangs over all those caps. About 3 or 4 mils clearance from the top of the caps.

                        Well anyway. I'll pay that for now, once the board becomes more outdate and won't be so important to me I'll be having it recapped myself.

                        Just one question I had if anyone could answer it.

                        Is deformation of the board fairly common ?

                        Just looking at the board it's a little bowed in the middle up the socket end. The reason I'm assuming it occurs commonly is an old P2 which had a really light heatsink was a little bowed and that also had it down near the AGP/PCI slots.

                        As compared to the latest processors which all have fairly large heatsinks and not to mention some of the massive aftermarket coolers. The waterblock was around 450g.

                        Just looked up an Intel article and they seem to feel it's normal... of course they would though.

                        Comment


                          #13
                          Re: Asus P5AD2 Premium - Bulging OSTs

                          Well I got the board back from Asus.

                          I've been sent my board back with replacement caps around the CPU socket.

                          Almost died of a heart attack when I saw what they were replaced with.

                          Pansonic FCs !

                          Clearly the repair centre knows what they're doing. Shame they don't come from the factory like that.

                          I'm still annoyed at having to pay for it but the cost of getting good caps and then paying for the replacement would have been a lot more. I would have been furious if they replaced them with OSTs again though.

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